#include <iostream>
#include <stack>
#include <cstring>
using namespace std;

int main()
{
    int N;
    stack <char> s;
    char a[1000];
    s.push('@');
    cin>>N;
    getchar();
    while(N--)
    {
        gets(a);
        int len=strlen(a);
        if(len%2!=0)
            cout<<"No"<<endl;
        else
        {
            for(int i=0;i<len;i++)
                if(a[i]=='['||a[i]=='(')
                    s.push(a[i]);
                else if((a[i]=='['&&s.top()==']')||(a[i]=='('&&s.top()==')'))
                    s.pop();
                else
                    s.push(a[i]);
            
            if(s.top()=='@')        
                cout<<"Yes"<<endl;
            else
                cout<<"No"<<endl;
               
        
        }
    }
    return 0;
}

不应该是Yes吗、

提交程序时总出现是RunTimeError是怎么回事呀

#include <iostream>
#include <stack>
#include <cstring>
using namespace std;

int main()
{
    int N;
    stack <char> s;
    char a[1000];
    s.push('@');
    cin>>N;
    getchar();
    while(N--)
    {
        gets(a);
        int len=strlen(a);
        if(len%2!=0)
        {
            cout<<"No"<<endl;
            break;
        }
        else
        {
            for(int i=0;a[i]!='\0';i++)
                if(a[i]=='['||a[i]=='(')
                    s.push(a[i]);
                else if((a[i]=='['&&s.top()==']')||(a[i]=='('&&s.top()==')'))
                    s.pop();
                else
                    s.push(a[i]);
            
            if(s.top()=='@')        
                cout<<"Yes"<<endl;
            else
                cout<<"No"<<endl;
               
        
        }
    }
    return 0;
}

改成这样提交时又出现编译时出错。。

int k[ 1<<CHAR_BIT-1];

这是什么意思呢？

谢谢。

你为什么这样来定义数组

匹配字符所对应的映射值

又是什么

谢谢 似乎明白了