{"id":39329,"date":"2025-05-23T09:49:25","date_gmt":"2025-05-23T01:49:25","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/39329.html"},"modified":"2025-05-23T09:49:25","modified_gmt":"2025-05-23T01:49:25","slug":"%e7%89%9b%e5%ae%a2%e5%91%a8%e8%b5%9b-round-92-%e9%a2%98%e8%a7%a3-java","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/39329.html","title":{"rendered":"\u725b\u5ba2\u5468\u8d5b Round 92 \u9898\u89e3 Java"},"content":{"rendered":"

\u76ee\u5f55<\/p>\n

A \u5c0f\u7ea2\u7684\u7b7e\u5230\u9898<\/p>\n

B \u5c0f\u7ea2\u7684\u6a21\u62df\u9898<\/p>\n

C \u5c0f\u7ea2\u7684\u65b9\u795e\u9898<\/p>\n

D \u5c0f\u7ea2\u7684\u6570\u5b66\u9898<\/p>\n

E \u5c0f\u7ea2\u7684 ds \u9898<\/p>\n

F \u5c0f\u7ea2\u7684\u5c0f\u82ef\u9898<\/p>\n

\n

A \u5c0f\u7ea2\u7684\u7b7e\u5230\u9898<\/h2>\n

\u76f4\u63a5\u6784\u9020\u7c7b\u4f3c\u4e8e a_aaaa，a_aaaaaaaa \u8fd9\u79cd \u5373\u53ef<\/p>\n

\/\/ @github https:\/\/github.com\/Dddddduo
\n\/\/ @github https:\/\/github.com\/Dddddduo\/acm-java-algorithm
\n\/\/ @github https:\/\/github.com\/Dddddduo\/Dduo-mini-data_structure
\nimport java.util.*;
\nimport java.io.*;
\nimport java.math.*;
\nimport java.lang.*;
\nimport java.time.*;<\/p>\n

\/**
\n * \u9898\u76ee\u5730\u5740
\n *
\n *\/<\/p>\n

\/\/ xixi\u2661\u897f
\npublic class Main {<\/p>\n

static IoScanner sc = new IoScanner();
\n static final int mod = (int) (1e9 + 7);
\n\/\/ static final int mod = (int) (1e9 + 7);<\/p>\n

static int n;
\n static int arr[];
\n static boolean visited[];
\n static ArrayList<ArrayList<Integer>> adj = new ArrayList<>();<\/p>\n

\/**
\n * @throws IOException
\n *\/
\n private static void solve() throws IOException {
\n \/\/ todo
\n int n=sc.nextInt();
\n dduo("a_");
\n for(int i=0;i<n-2;i++) {
\n dduo("a");
\n }
\n }<\/p>\n

public static void main(String[] args) throws Exception {
\n int t = 1;
\n\/\/ t = sc.nextInt();
\n while (t– > 0) {
\n solve();
\n }
\n }<\/p>\n

static <T> void dduo(T t) {
\n System.out.print(t);
\n }<\/p>\n

static <T> void dduoln() {
\n System.out.println("");
\n }<\/p>\n

static <T> void dduoln(T t) {
\n System.out.println(t);
\n }
\n}<\/p>\n

\/**
\n * IoScanner\u7c7b
\n *
\n * @author Dduo
\n * @version 1.0
\n * @description \u901a\u8fc7IO\u6d41\u64cd\u4f5c\u7f13\u51b2\u533a\u51cf\u5c11\u4e86\u4e0e\u5e95\u5c42\u8f93\u5165\u8f93\u51fa\u8bbe\u5907\u7684\u4ea4\u4e92\u6b21\u6570，\u65e8\u5728\u7b80\u5316 Java \u4e2d\u7684\u6807\u51c6\u8f93\u5165\u8bfb\u53d6\u64cd\u4f5c\u3002
\n *\/
\nclass IoScanner {
\n BufferedReader bf;
\n StringTokenizer st;
\n BufferedWriter bw;<\/p>\n

public IoScanner() {
\n bf = new BufferedReader(new InputStreamReader(System.in));
\n st = new StringTokenizer("");
\n bw = new BufferedWriter(new OutputStreamWriter(System.out));
\n }<\/p>\n

public String nextLine() throws IOException {
\n return bf.readLine();
\n }<\/p>\n

public String next() throws IOException {
\n while (!st.hasMoreTokens()) {
\n st = new StringTokenizer(bf.readLine());
\n }
\n return st.nextToken();
\n }<\/p>\n

public char nextChar() throws IOException {
\n return next().charAt(0);
\n }<\/p>\n

public int nextInt() throws IOException {
\n return Integer.parseInt(next());
\n }<\/p>\n

public long nextLong() throws IOException {
\n return Long.parseLong(next());
\n }<\/p>\n

public double nextDouble() throws IOException {
\n return Double.parseDouble(next());
\n }<\/p>\n

public float nextFloat() throws IOException {
\n return Float.parseFloat(next());
\n }<\/p>\n

public BigInteger nextBigInteger() throws IOException {
\n return new BigInteger(next());
\n }<\/p>\n

public BigDecimal nextDecimal() throws IOException {
\n return new BigDecimal(next());
\n }
\n} <\/p>\n

B \u5c0f\u7ea2\u7684\u6a21\u62df\u9898<\/h2>\n

\u7b2c\u4e00\u773c\u4ee5\u4e3a\u662f dfs<\/p>\n

\u4f46\u662f\u770b\u5230\u4e86<\/p>\n

\n

\"\"<\/p>\n

\u53ea\u6709\u4e00\u4e2a\u9677\u9631\u683c\u5b50<\/p>\n

\u6240\u4ee5\u53ea\u8981\u89c4\u5b9a\u4e00\u6761\u5230\u7ec8\u70b9\u7684\u8def\u7ebf \u5148\u4e00\u76f4\u5f80\u53f3\u8d70 \u518d\u4e00\u76f4\u5f80\u4e0b\u8d70<\/p>\n

\u5982\u679c\u9677\u9631\u683c\u5b50\u5728\u8fd9\u6761\u7ebf\u8def\u4e0a<\/p>\n

\u5c31\u4e00\u76f4\u5f80\u4e0b\u8d70 \u518d\u4e00\u76f4\u5f80\u53f3\u8d70 \u4ee5\u5230\u8fbe\u7ec8\u70b9<\/p>\n

\/\/ @github https:\/\/github.com\/Dddddduo
\n\/\/ @github https:\/\/github.com\/Dddddduo\/acm-java-algorithm
\n\/\/ @github https:\/\/github.com\/Dddddduo\/Dduo-mini-data_structure
\nimport java.util.*;
\nimport java.io.*;
\nimport java.math.*;
\nimport java.lang.*;
\nimport java.time.*;<\/p>\n

\/**
\n * \u9898\u76ee\u5730\u5740
\n *
\n *\/<\/p>\n

\/\/ xixi\u2661\u897f
\npublic class Main {<\/p>\n

static IoScanner sc = new IoScanner();
\n static final int mod = (int) (1e9 + 7);
\n\/\/ static final int mod = (int) (1e9 + 7);<\/p>\n

static int n;
\n static int arr[];
\n static boolean visited[];
\n static ArrayList<ArrayList<Integer>> adj = new ArrayList<>();<\/p>\n

\/**
\n * @throws IOException
\n *\/
\n private static void solve() throws IOException {
\n \/\/ todo
\n int n=sc.nextInt();
\n int m=sc.nextInt();<\/p>\n

char arr[][]=new char[n][m];
\n for(int i=0;i<n;i++) {
\n String str=sc.next();
\n arr[i]=str.toCharArray();
\n }<\/p>\n

int x=0;
\n int y=0;
\n for(int i=0;i<n;i++) {
\n for(int j=0;j<m;j++) {
\n if(arr[i][j]=='#') {
\n x=i;
\n y=j;
\n }
\n }
\n }<\/p>\n

if(x==0||y==m-1) {
\n for(int i=0;i<n-1;i++) {
\n dduo("S");
\n }
\n for(int i=0;i<m-1;i++) {
\n dduo("D");
\n }
\n }else if(y==0||x==n-1){
\n for(int i=0;i<m-1;i++) {
\n dduo("D");
\n }
\n for(int i=0;i<n-1;i++) {
\n dduo("S");
\n }
\n }else {
\n for(int i=0;i<n-1;i++) {
\n dduo("S");
\n }
\n for(int i=0;i<m-1;i++) {
\n dduo("D");
\n }
\n }<\/p>\n

}<\/p>\n

public static void main(String[] args) throws Exception {
\n int t = 1;
\n\/\/ t = sc.nextInt();
\n while (t– > 0) {
\n solve();
\n }
\n }<\/p>\n

static <T> void dduo(T t) {
\n System.out.print(t);
\n }<\/p>\n

static <T> void dduoln() {
\n System.out.println("");
\n }<\/p>\n

static <T> void dduoln(T t) {
\n System.out.println(t);
\n }
\n}<\/p>\n

\/**
\n * IoScanner\u7c7b
\n *
\n * @author Dduo
\n * @version 1.0
\n * @description \u901a\u8fc7IO\u6d41\u64cd\u4f5c\u7f13\u51b2\u533a\u51cf\u5c11\u4e86\u4e0e\u5e95\u5c42\u8f93\u5165\u8f93\u51fa\u8bbe\u5907\u7684\u4ea4\u4e92\u6b21\u6570，\u65e8\u5728\u7b80\u5316 Java \u4e2d\u7684\u6807\u51c6\u8f93\u5165\u8bfb\u53d6\u64cd\u4f5c\u3002
\n *\/
\nclass IoScanner {
\n BufferedReader bf;
\n StringTokenizer st;
\n BufferedWriter bw;<\/p>\n

public IoScanner() {
\n bf = new BufferedReader(new InputStreamReader(System.in));
\n st = new StringTokenizer("");
\n bw = new BufferedWriter(new OutputStreamWriter(System.out));
\n }<\/p>\n

public String nextLine() throws IOException {
\n return bf.readLine();
\n }<\/p>\n

public String next() throws IOException {
\n while (!st.hasMoreTokens()) {
\n st = new StringTokenizer(bf.readLine());
\n }
\n return st.nextToken();
\n }<\/p>\n

public char nextChar() throws IOException {
\n return next().charAt(0);
\n }<\/p>\n

public int nextInt() throws IOException {
\n return Integer.parseInt(next());
\n }<\/p>\n

public long nextLong() throws IOException {
\n return Long.parseLong(next());
\n }<\/p>\n

public double nextDouble() throws IOException {
\n return Double.parseDouble(next());
\n }<\/p>\n

public float nextFloat() throws IOException {
\n return Float.parseFloat(next());
\n }<\/p>\n

public BigInteger nextBigInteger() throws IOException {
\n return new BigInteger(next());
\n }<\/p>\n

public BigDecimal nextDecimal() throws IOException {
\n return new BigDecimal(next());
\n }
\n} <\/p>\n

C \u5c0f\u7ea2\u7684\u65b9\u795e\u9898<\/h2>\n

\u5176\u5b9e\u6211\u60f3\u4e86\u4e00\u4f1a<\/p>\n

\u7136\u540e\u6839\u636e\u6837\u4f8b\u8bd5\u4e86\u8bd5<\/p>\n

\n

\"\"<\/p>\n

\u8f93\u5165 4<\/p>\n

1 4 3 2<\/p>\n

\u8f93\u5165 5<\/p>\n

1 5 4 3 2<\/p>\n

\u90fd\u662f\u7b26\u5408\u7684<\/p>\n

\/\/ @github https:\/\/github.com\/Dddddduo
\n\/\/ @github https:\/\/github.com\/Dddddduo\/acm-java-algorithm
\n\/\/ @github https:\/\/github.com\/Dddddduo\/Dduo-mini-data_structure
\nimport java.util.*;
\nimport java.io.*;
\nimport java.math.*;
\nimport java.lang.*;
\nimport java.time.*;<\/p>\n

\/**
\n * \u9898\u76ee\u5730\u5740
\n *
\n *\/<\/p>\n

\/\/ xixi\u2661\u897f
\npublic class Main {<\/p>\n

static IoScanner sc = new IoScanner();
\n static final int mod = (int) (1e9 + 7);
\n\/\/ static final int mod = (int) (1e9 + 7);<\/p>\n

static int n;
\n static int arr[];
\n static boolean visited[];
\n static ArrayList<ArrayList<Integer>> adj = new ArrayList<>();<\/p>\n

\/**
\n * @throws IOException
\n *\/
\n private static void solve() throws IOException {
\n \/\/ todo
\n int n=sc.nextInt();<\/p>\n

if(n==1||n==2) {
\n dduoln("-1");
\n return;
\n }<\/p>\n

dduo(1+" ");<\/p>\n

for(int i=n;i>=2;i–) {
\n dduo(i+" ");
\n }
\n }<\/p>\n

public static void main(String[] args) throws Exception {
\n int t = 1;
\n\/\/ t = sc.nextInt();
\n while (t– > 0) {
\n solve();
\n }
\n }<\/p>\n

static <T> void dduo(T t) {
\n System.out.print(t);
\n }<\/p>\n

static <T> void dduoln() {
\n System.out.println("");
\n }<\/p>\n

static <T> void dduoln(T t) {
\n System.out.println(t);
\n }
\n}<\/p>\n

\/**
\n * IoScanner\u7c7b
\n *
\n * @author Dduo
\n * @version 1.0
\n * @description \u901a\u8fc7IO\u6d41\u64cd\u4f5c\u7f13\u51b2\u533a\u51cf\u5c11\u4e86\u4e0e\u5e95\u5c42\u8f93\u5165\u8f93\u51fa\u8bbe\u5907\u7684\u4ea4\u4e92\u6b21\u6570，\u65e8\u5728\u7b80\u5316 Java \u4e2d\u7684\u6807\u51c6\u8f93\u5165\u8bfb\u53d6\u64cd\u4f5c\u3002
\n *\/
\nclass IoScanner {
\n BufferedReader bf;
\n StringTokenizer st;
\n BufferedWriter bw;<\/p>\n

public IoScanner() {
\n bf = new BufferedReader(new InputStreamReader(System.in));
\n st = new StringTokenizer("");
\n bw = new BufferedWriter(new OutputStreamWriter(System.out));
\n }<\/p>\n

public String nextLine() throws IOException {
\n return bf.readLine();
\n }<\/p>\n

public String next() throws IOException {
\n while (!st.hasMoreTokens()) {
\n st = new StringTokenizer(bf.readLine());
\n }
\n return st.nextToken();
\n }<\/p>\n

public char nextChar() throws IOException {
\n return next().charAt(0);
\n }<\/p>\n

public int nextInt() throws IOException {
\n return Integer.parseInt(next());
\n }<\/p>\n

public long nextLong() throws IOException {
\n return Long.parseLong(next());
\n }<\/p>\n

public double nextDouble() throws IOException {
\n return Double.parseDouble(next());
\n }<\/p>\n

public float nextFloat() throws IOException {
\n return Float.parseFloat(next());
\n }<\/p>\n

public BigInteger nextBigInteger() throws IOException {
\n return new BigInteger(next());
\n }<\/p>\n

public BigDecimal nextDecimal() throws IOException {
\n return new BigDecimal(next());
\n }
\n} <\/p>\n

D \u5c0f\u7ea2\u7684\u6570\u5b66\u9898<\/h2>\n

\n

\"\"<\/p>\n

\u6211\u7684\u9996\u5148\u60f3\u5230\u7684\u662f\u97e6\u8fbe\u5b9a\u7406<\/p>\n

\u8981\u6c42\u662f x1 x2 \u4e92\u4e0d\u76f8\u540c \u800c\u4e14 x1+x2+x1*x2==k<\/p>\n

\u4e4b\u540e x1+x2 \u4e3a p ，x1*x2 \u4e3a q<\/p>\n

\n

\"\"<\/p>\n

\u5176\u6b21\u8fdb\u884c\u4e86\u6253\u8868<\/p>\n

\u83b7\u53d6\u4e86\u5927\u91cf\u6570\u636e<\/p>\n

\n

\"\"<\/p>\n

\u53d1\u73b0\u5947\u6570\u7684\u8bdd \u662f\u4e00\u5b9a\u53ef\u4ee5\u7684 \u53ea\u8981\u6784\u9020\u5176\u4e2d\u4e00\u4e2a\u6570\u4e3a 1 \u5373\u53ef<\/p>\n

\u63a5\u7740\u662f\u5076\u6570<\/p>\n

\u6211\u627e\u51fa\u7684\u89c4\u5f8b\u662f\u8fd9\u6837\u7684<\/p>\n

\n

\"\"<\/p>\n

\u7136\u540e\u6839\u636e\u89c4\u5f8b\u63a8<\/p>\n

\u653e\u5927\u5faa\u73af\u7684\u6b21\u6570 \u5c31\u8fc7\u4e86<\/p>\n

\/\/ @github https:\/\/github.com\/Dddddduo
\n\/\/ @github https:\/\/github.com\/Dddddduo\/acm-java-algorithm
\n\/\/ @github https:\/\/github.com\/Dddddduo\/Dduo-mini-data_structure
\nimport java.util.*;
\nimport java.io.*;
\nimport java.math.*;
\nimport java.lang.*;
\nimport java.time.*;<\/p>\n

\/**
\n * \u9898\u76ee\u5730\u5740
\n *
\n *\/<\/p>\n

\/\/ xixi\u2661\u897f
\npublic class Main {<\/p>\n

static IoScanner sc = new IoScanner();
\n static final int mod = (int) (1e9 + 7);
\n\/\/ static final int mod = (int) (1e9 + 7);<\/p>\n

static int n;
\n static int arr[];
\n static boolean visited[];
\n static ArrayList<ArrayList<Integer>> adj = new ArrayList<>();<\/p>\n

\/**
\n * @throws IOException
\n *\/
\n private static void solve() throws IOException {
\n \/\/ todo<\/p>\n

\/\/ TreeSet<Integer>hs=new TreeSet<>();
\n\/\/ for(int i=1;i<=100;i++) {
\n\/\/ for(int j=i+1;j<=100;j++) {
\n\/\/ \/\/ k
\n\/\/ if( (i+j+i*j) %2==0) {
\n\/\/ dduoln((i+j)+" "+(i*j)+" "+(i+j+i*j));
\n\/\/ }
\n\/\/ hs.add((i+j+i*j));
\n\/\/ }
\n\/\/ }
\n\/\/
\n\/\/ for(Integer i:hs) {
\n\/\/ if(i%2==0) {
\n\/\/ dduoln(i);
\n\/\/ }
\n\/\/ }<\/p>\n

long k=sc.nextLong();
\n if(k%2!=0) {
\n \/\/ \u5947\u6570
\n if(k==1||k==3) {
\n dduoln("-1");
\n return;
\n }
\n long ans1=k-1;
\n ans1\/=2;
\n long ans2=(1+ans1);
\n dduoln((ans1)+" "+(ans2));
\n }else {
\n \/\/ \u5076\u6570
\n long zuobian=14;
\n long youbian=6;<\/p>\n

long zuopbianjia=12;
\n long youbianjia=4;<\/p>\n

\/\/ todo
\n for(int i=0;i<1000000;i++) {
\n if(k-zuobian<0) {
\n dduoln("-1");
\n return;
\n }
\n long youbianshengxialai=k-zuobian;
\n if(youbianshengxialai%youbian==0) {
\n long nn=youbianshengxialai\/youbian;
\n\/\/ dduoln(nn);
\n\/\/ dduoln((zuobian-youbian)+" "+nn*(youbian-2));
\n dduoln((youbian+2*nn)+" "+((zuobian-youbian)+(nn*(youbian-2))));
\n return;
\n }
\n zuopbianjia+=8;
\n zuobian+=zuopbianjia;
\n youbian+=youbianjia;
\n }
\n }<\/p>\n

}<\/p>\n

public static void main(String[] args) throws Exception {
\n int t = 1;
\n\/\/ t = sc.nextInt();
\n while (t– > 0) {
\n solve();
\n }
\n }<\/p>\n

static <T> void dduo(T t) {
\n System.out.print(t);
\n }<\/p>\n

static <T> void dduoln() {
\n System.out.println("");
\n }<\/p>\n

static <T> void dduoln(T t) {
\n System.out.println(t);
\n }
\n}<\/p>\n

\/**
\n * IoScanner\u7c7b
\n *
\n * @author Dduo
\n * @version 1.0
\n * @description \u901a\u8fc7IO\u6d41\u64cd\u4f5c\u7f13\u51b2\u533a\u51cf\u5c11\u4e86\u4e0e\u5e95\u5c42\u8f93\u5165\u8f93\u51fa\u8bbe\u5907\u7684\u4ea4\u4e92\u6b21\u6570，\u65e8\u5728\u7b80\u5316 Java \u4e2d\u7684\u6807\u51c6\u8f93\u5165\u8bfb\u53d6\u64cd\u4f5c\u3002
\n *\/
\nclass IoScanner {
\n BufferedReader bf;
\n StringTokenizer st;
\n BufferedWriter bw;<\/p>\n

public IoScanner() {
\n bf = new BufferedReader(new InputStreamReader(System.in));
\n st = new StringTokenizer("");
\n bw = new BufferedWriter(new OutputStreamWriter(System.out));
\n }<\/p>\n

public String nextLine() throws IOException {
\n return bf.readLine();
\n }<\/p>\n

public String next() throws IOException {
\n while (!st.hasMoreTokens()) {
\n st = new StringTokenizer(bf.readLine());
\n }
\n return st.nextToken();
\n }<\/p>\n

public char nextChar() throws IOException {
\n return next().charAt(0);
\n }<\/p>\n

public int nextInt() throws IOException {
\n return Integer.parseInt(next());
\n }<\/p>\n

public long nextLong() throws IOException {
\n return Long.parseLong(next());
\n }<\/p>\n

public double nextDouble() throws IOException {
\n return Double.parseDouble(next());
\n }<\/p>\n

public float nextFloat() throws IOException {
\n return Float.parseFloat(next());
\n }<\/p>\n

public BigInteger nextBigInteger() throws IOException {
\n return new BigInteger(next());
\n }<\/p>\n

public BigDecimal nextDecimal() throws IOException {
\n return new BigDecimal(next());
\n }
\n} <\/p>\n

E \u5c0f\u7ea2\u7684 ds \u9898<\/h2>\n

\u6211\u611f\u89c9\u8fd9\u9898\u7684\u96be\u5ea6\u5c0f\u4e8e D<\/p>\n

\u7ed9\u51fa\u4e8c\u53c9\u6811\u6bcf\u4e00\u5c42\u7684\u8282\u70b9<\/p>\n

\u7136\u540e\u6784\u9020\u51fa\u4e8c\u53c9\u6811<\/p>\n

\u6bcf\u4e2a\u8282\u70b9\u6709 0 \u4e2a 1 \u4e2a 2 \u4e2a\u8282\u70b9<\/p>\n

\u6211\u4eec\u76f4\u63a5\u987a\u7740\u5f80\u4e0b\u6784\u9020\u5c31\u884c<\/p>\n

\u76f4\u63a5\u4e00\u5c42\u4e00\u5c42\u63a8<\/p>\n

\u4ec0\u4e48\u60c5\u51b5\u4e0b\u6784\u9020\u4e0d\u51fa\u6765\u5462<\/p>\n

\u5f53\u8fd9\u4e0b\u5c42\u7684\u8282\u70b9\u6570\u5927\u4e8e\u8fd9\u4e00\u5c42\u7684\u4e24\u500d\u65f6\u65e0\u6cd5\u6784\u9020 \u56e0\u4e3a\u8fd9\u4e00\u5c42\u7684\u6bcf\u4e2a\u8282\u70b9\u6700\u591a\u8fde\u4e0b\u4e00\u5c42\u7684\u4e24\u4e2a\u8282\u70b9<\/p>\n

\u63a5\u7740\u5c31\u662f\u4e00\u4e2a\u4e2a\u6784\u9020<\/p>\n

\n

\"\"<\/p>\n

\/\/ @github https:\/\/github.com\/Dddddduo
\n\/\/ @github https:\/\/github.com\/Dddddduo\/acm-java-algorithm
\n\/\/ @github https:\/\/github.com\/Dddddduo\/Dduo-mini-data_structure
\nimport java.util.*;
\nimport java.io.*;
\nimport java.math.*;
\nimport java.lang.*;
\nimport java.time.*;<\/p>\n

\/**
\n * \u9898\u76ee\u5730\u5740
\n *
\n *\/<\/p>\n

\/\/ xixi\u2661\u897f
\npublic class Main {<\/p>\n

static IoScanner sc = new IoScanner();
\n static final int mod = (int) (1e9 + 7);
\n\/\/ static final int mod = (int) (1e9 + 7);<\/p>\n

static int n;
\n static int arr[];
\n static boolean visited[];
\n static ArrayList<ArrayList<Integer>> adj = new ArrayList<>();<\/p>\n

\/**
\n * @throws IOException
\n *\/
\n private static void solve() throws IOException {
\n \/\/ todo
\n int n=sc.nextInt();
\n long arr[]=new long[n+1];
\n for(int i=1;i<=n;i++) {
\n arr[i]=sc.nextLong();
\n }<\/p>\n

for(int i=2;i<=n;i++) {
\n if( (arr[i]) > (arr[i-1]*2) ) {
\n dduoln("-1");
\n return;
\n }
\n }<\/p>\n

dduoln("1");<\/p>\n

long cnt=2;<\/p>\n

for(int i=1;i<=n;i++) {
\n long ans=arr[i]; \/\/ \u5f53\u524d\u5c42\u6709\u591a\u5c11\u8282\u70b9
\n if(i==n) {
\n \/\/ \u6700\u540e\u4e00\u5c42
\n for(int j=0;j<ans;j++) {
\n dduoln("-1 -1");
\n }
\n }else {
\n \/\/ \u4e0b\u4e00\u5c42\u6709\u591a\u5c11\u4e2a\u8282\u70b9
\n long next=arr[i+1];
\n\/\/ cnt+=ans;
\n for(int j=0;j<ans;j++) {
\n if(next>=2) {
\n dduo(cnt);
\n dduo(" ");
\n cnt++;
\n dduoln(cnt);
\n cnt++;
\n next-=2;
\n }else if(next==1){
\n dduo(cnt);
\n dduo(" ");
\n cnt++;
\n dduoln("-1");
\n next-=1;
\n }else {
\n dduoln("-1 -1");
\n }
\n }
\n }
\n\/\/cnt+=ans;
\n }<\/p>\n

}<\/p>\n

public static void main(String[] args) throws Exception {
\n int t = 1;
\n\/\/ t = sc.nextInt();
\n while (t– > 0) {
\n solve();
\n }
\n }<\/p>\n

static <T> void dduo(T t) {
\n System.out.print(t);
\n }<\/p>\n

static <T> void dduoln() {
\n System.out.println("");
\n }<\/p>\n

static <T> void dduoln(T t) {
\n System.out.println(t);
\n }
\n}<\/p>\n

\/**
\n * IoScanner\u7c7b
\n *
\n * @author Dduo
\n * @version 1.0
\n * @description \u901a\u8fc7IO\u6d41\u64cd\u4f5c\u7f13\u51b2\u533a\u51cf\u5c11\u4e86\u4e0e\u5e95\u5c42\u8f93\u5165\u8f93\u51fa\u8bbe\u5907\u7684\u4ea4\u4e92\u6b21\u6570，\u65e8\u5728\u7b80\u5316 Java \u4e2d\u7684\u6807\u51c6\u8f93\u5165\u8bfb\u53d6\u64cd\u4f5c\u3002
\n *\/
\nclass IoScanner {
\n BufferedReader bf;
\n StringTokenizer st;
\n BufferedWriter bw;<\/p>\n

public IoScanner() {
\n bf = new BufferedReader(new InputStreamReader(System.in));
\n st = new StringTokenizer("");
\n bw = new BufferedWriter(new OutputStreamWriter(System.out));
\n }<\/p>\n

public String nextLine() throws IOException {
\n return bf.readLine();
\n }<\/p>\n

public String next() throws IOException {
\n while (!st.hasMoreTokens()) {
\n st = new StringTokenizer(bf.readLine());
\n }
\n return st.nextToken();
\n }<\/p>\n

public char nextChar() throws IOException {
\n return next().charAt(0);
\n }<\/p>\n

public int nextInt() throws IOException {
\n return Integer.parseInt(next());
\n }<\/p>\n

public long nextLong() throws IOException {
\n return Long.parseLong(next());
\n }<\/p>\n

public double nextDouble() throws IOException {
\n return Double.parseDouble(next());
\n }<\/p>\n

public float nextFloat() throws IOException {
\n return Float.parseFloat(next());
\n }<\/p>\n

public BigInteger nextBigInteger() throws IOException {
\n return new BigInteger(next());
\n }<\/p>\n

public BigDecimal nextDecimal() throws IOException {
\n return new BigDecimal(next());
\n }
\n} <\/p>\n

F \u5c0f\u7ea2\u7684\u5c0f\u82ef\u9898<\/h2>\n

\n

\"\"<\/p>\n

\u6784\u9020\u4e00\u4e2a\u77e9\u9635 \u6bcf\u884c\u6bcf\u5217\u7684\u5f02\u6216\u548c\u6784\u6210\u6392\u5217<\/p>\n

\u8fd9\u6837\u6784\u9020 \u7136\u540e\u6b63\u597d\u8981\u6ee1\u8db3\u8fd9\u4e2a\u60c5\u51b5<\/p>\n

\u5c31\u662f \u884c\u52a0\u5217%4==3<\/p>\n

\u5f88\u5947\u5999！<\/p>\n

\n

\"\"<\/p>\n

\/\/ @github https:\/\/github.com\/Dddddduo
\n\/\/ @github https:\/\/github.com\/Dddddduo\/acm-java-algorithm
\n\/\/ @github https:\/\/github.com\/Dddddduo\/Dduo-mini-data_structure
\nimport java.util.*;
\nimport java.io.*;
\nimport java.math.*;
\nimport java.lang.*;
\nimport java.time.*;<\/p>\n

\/**
\n * \u9898\u76ee\u5730\u5740
\n *
\n *\/<\/p>\n

\/\/ xixi\u2661\u897f
\npublic class Main {<\/p>\n

static IoScanner sc = new IoScanner();
\n static final int mod = (int) (1e9 + 7);
\n\/\/ static final int mod = (int) (1e9 + 7);<\/p>\n

static int n;
\n static int arr[];
\n static boolean visited[];
\n static ArrayList<ArrayList<Integer>> adj = new ArrayList<>();<\/p>\n

\/**
\n * @throws IOException
\n *\/<\/p>\n

\/\/ 2 5
\n \/\/ 0 0 0 0 7
\n \/\/ 1 2 3 4 2
\n private static void solve() throws IOException {
\n \/\/ todo
\n int n = sc.nextInt();
\n int m = sc.nextInt();
\n int k = n + m;<\/p>\n

if (k % 4 != 3) {
\n dduoln("-1");
\n return;
\n }<\/p>\n

\/\/ \u884c
\n int[] rows = new int[n];
\n for (int i = 0; i < n; i++) {
\n rows[i] = k – i;
\n }<\/p>\n

\/\/ \u5217
\n int[] cols = new int[m];
\n for (int i = 0; i < m; i++) {
\n cols[i] = i + 1;
\n }<\/p>\n

int[][] arr = new int[n][m];
\n for (int i = 0; i < n – 1; i++) {
\n for (int j = 0; j < m – 1; j++) {
\n arr[i][j] = 0;
\n }
\n arr[i][m – 1] = rows[i];
\n }<\/p>\n

if (m == 0) {
\n dduoln("-1");
\n return;
\n }<\/p>\n

\/\/ \u5217\u5904\u7406
\n for (int j = 0; j < m – 1; j++) {
\n arr[n – 1][j] = cols[j];
\n }<\/p>\n

int ans = 0;
\n for (int i = 0; i < n – 1; i++) {
\n ans ^= rows[i];
\n }<\/p>\n

int x = cols[m – 1] ^ ans;
\n arr[n – 1][m – 1] = x;<\/p>\n

for (int i = 0; i < n; i++) {
\n int xor = 0;
\n for (int num : arr[i]) {
\n xor ^= num;
\n }
\n assert xor == rows[i] : "Row " + i + " xor error";
\n }<\/p>\n

for (int j = 0; j < m; j++) {
\n int xor = 0;
\n for (int i = 0; i < n; i++) {
\n xor ^= arr[i][j];
\n }
\n assert xor == cols[j] : "Col " + j + " xor error";
\n }<\/p>\n

for (int[] row : arr) {
\n StringBuilder sb = new StringBuilder();
\n for (int num : row) {
\n sb.append(num).append(" ");
\n }
\n dduoln(sb.toString());
\n }<\/p>\n

}<\/p>\n

public static void main(String[] args) throws Exception {
\n int t = 1;
\n\/\/ t = sc.nextInt();
\n while (t– > 0) {
\n solve();
\n }
\n }<\/p>\n

static <T> void dduo(T t) {
\n System.out.print(t);
\n }<\/p>\n

static <T> void dduoln() {
\n System.out.println("");
\n }<\/p>\n

static <T> void dduoln(T t) {
\n System.out.println(t);
\n }
\n}<\/p>\n

\/**
\n * IoScanner\u7c7b
\n *
\n * @author Dduo
\n * @version 1.0
\n * @description \u901a\u8fc7IO\u6d41\u64cd\u4f5c\u7f13\u51b2\u533a\u51cf\u5c11\u4e86\u4e0e\u5e95\u5c42\u8f93\u5165\u8f93\u51fa\u8bbe\u5907\u7684\u4ea4\u4e92\u6b21\u6570，\u65e8\u5728\u7b80\u5316 Java \u4e2d\u7684\u6807\u51c6\u8f93\u5165\u8bfb\u53d6\u64cd\u4f5c\u3002
\n *\/
\nclass IoScanner {
\n BufferedReader bf;
\n StringTokenizer st;
\n BufferedWriter bw;<\/p>\n

public IoScanner() {
\n bf = new BufferedReader(new InputStreamReader(System.in));
\n st = new StringTokenizer("");
\n bw = new BufferedWriter(new OutputStreamWriter(System.out));
\n }<\/p>\n

public String nextLine() throws IOException {
\n return bf.readLine();
\n }<\/p>\n

public String next() throws IOException {
\n while (!st.hasMoreTokens()) {
\n st = new StringTokenizer(bf.readLine());
\n }
\n return st.nextToken();
\n }<\/p>\n

public char nextChar() throws IOException {
\n return next().charAt(0);
\n }<\/p>\n

public int nextInt() throws IOException {
\n return Integer.parseInt(next());
\n }<\/p>\n

public long nextLong() throws IOException {
\n return Long.parseLong(next());
\n }<\/p>\n

public double nextDouble() throws IOException {
\n return Double.parseDouble(next());
\n }<\/p>\n

public float nextFloat() throws IOException {
\n return Float.parseFloat(next());
\n }<\/p>\n

public BigInteger nextBigInteger() throws IOException {
\n return new BigInteger(next());
\n }<\/p>\n

public BigDecimal nextDecimal() throws IOException {
\n return new BigDecimal(next());
\n }
\n}<\/p>\n","protected":false},"excerpt":{"rendered":"

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