符号配对

```
#include<iostream>
#include<stack>
using namespace std;
int main()
{
    stack<char> c;
    string s = "";
    char ch;
    int i, len;
    while (1)
    {
        if ((ch = getchar()) == '.')
            if ((ch = getchar()) == '\n')
                break;
        if (ch == '{' || ch == '[' || ch == '(' || ch == '}' || ch == ']' || ch == ')')
            s += ch;
        else if (ch == '/')
        {
            if ((ch = getchar()) == '*')
                s += '<';
        }
        else if (ch == '*')
        {
            if ((ch = getchar()) == '/')
                s += '>';
        }
    }
    len = s.length();
    for (i = 0; i < len; i++)
    {
        if (s[i] == '{' || s[i] == '[' || s[i] == '(' || s[i] == '<')
            c.push(s[i]);
        else if (s[i] == ']' || s[i] == ')' || s[i] == '}' || s[i] == '>')
        {
            if (c.empty())
                break;
            if ((s[i] == ']' && c.top() == '[') || (s[i] == ')' && c.top() == '(') || (s[i] == '}' && c.top() == '{') || (s[i] == '>' && c.top() == '<'))
                c.pop();
            else
                break;
        }
    }
    if (c.empty() && i == len)
        cout << "YES";
    else
    {
        cout << "NO" << endl;
        if (c.empty())
        {
            if (s[i] == '<')
                cout << "/*-?";
            else if (s[i] == '>')
                cout << "?-*/";
            else if (s[i] == '(' || s[i] == '[' || s[i] == '{')
                cout << s[i] << "-?";
            else
                cout << "?-" << s[i];
        }
        else
        {
            if (c.top() == '<')
                cout << "/*-?";
            else if (c.top() == '>')
                cout << "?-*/";
            else if (c.top() == '(' || c.top() == '[' || c.top() == '{')
                cout << c.top() << "-?";
            else
                cout << "?-" << c.top();
        }
    }
}

```

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