• [原]NYOJ-括号匹配-2(java)


    大学生程序代写 //http://acm.nyist.net/JudgeOnline/problem.php?pid=2
    括号配对问题
    时间限制:3000 ms  |  内存限制:65535 KB 
    难度:3
    描述 
    现在,有一行括号序列,请你检查这行括号是否配对。 
    输入 
    第一行输入一个数N(0<N<=100),表示有N组测试数据。后面的N行输入多组输入数据,每组输入数据都是一个字符串S(S的长度小于10000,且S不是空串),测试数据组数少于5组。数据保证S中只含有"[","]","(",")"四种字符 
    输出 
    每组输入数据的输出占一行,如果该字符串中所含的括号是配对的,则输出Yes,如果不配对则输出No 
    样例输入 
    3
    [(])
    (])
    ([[]()])样例输出 
    No
    No
    Yes来源 
    网络 
    上传者 
    naonao 




    import java.util.*;
    public class 括号匹配2_2013_5_23 {//
    public static void main(String[] args) {
    //Bracket B=new Bracket();
    Scanner input = new Scanner(System.in);
    int n = input.nextInt();
    while (n-- > 0) {
    String a = input.next();
    if (Bracket.isMatch(a))
    System.out.println("Yes");
    else
    System.out.println("No");
    }
    }
    public static class Bracket{
    static boolean isMatch(String b){
    boolean m = true;
    Stack<Character> st = new Stack<Character>();
    for (int i = 0; i < b.length(); i++) {
    char p = b.charAt(i);
    if (p == '[' || p == '(')
    st.push(p);
    if (p == ']' || p == ')') {
    if (st.isEmpty()) {
    m = false;
    break;

    else {
    if ((p == ']' && st.peek() == '[')
    || (p == ')' && st.peek() == '('))
    st.pop();
    else {
    m = false;
    break;
    }
    }
    }
    }
    if(!st.isEmpty())m=false;
    return m;
    }

    }


    }








      /*//BufferedReader读取字符速度更快
     import java.io.BufferedReader;
    import java.io.InputStreamReader;
    import java.util.Scanner;
    import java.util.Stack;


    public class 括号匹配2013_5_23  {


    public static void main(String[] args) {//==========效率更高===========,


    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String str = null;
    Stack<Character> stack = new Stack<Character>();


    try{
    int cases = Integer.valueOf(br.readLine());
    while(cases-->0){


    str = br.readLine();
    int strLength = str.length();
    boolean isMatch = true;
    stack.clear();
    stack.push('#');
    for(int i = 0; i < strLength; ++i){
    char ch = str.charAt(i);
    switch(ch){
    case '(':
    stack.push(ch);
    break;
    case '[':
    stack.push(ch);
    break;
    case ')':
    if(stack.pop() != '('){
    isMatch = false;
    }
    break;
    case ']':
    if(stack.pop() != '['){
    isMatch = false;
    }
    break;
    default:
    isMatch = false;
    break;
    }
    if(!isMatch){
    break;
    }
    }
    if(isMatch&&stack.pop()=='#'){
    System.out.println("Yes");
    }else{
    System.out.println("No");
    }
    }
    }catch(Exception e){
    e.printStackTrace();
    }
    }
    }
    */
     
    作者:chao1983210400 发表于2013-7-10 13:49:50 原文链接
    阅读:17 评论:0 查看评论
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  • 原文地址:https://www.cnblogs.com/java20130726/p/3218715.html
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