hdu 1702 水水

水啊水~水啊水~~~~

AC代码如下：

#include <iostream>
#include <cstring>
#include <cstdio>
#include <algorithm>
#include <queue>
#include <stack>
using namespace std;

int main(){
    int T, N;
    char s[10];
    cin >> T;
    while( T-- ){
        cin >> N >> s;
        if( strcmp( s, "FIFO" ) == 0 ){
            queue<int> q;
            for( int i = 0; i < N; i++ ){
                cin >> s;
                if( strcmp( s, "IN" ) == 0 ){
                    int temp;
                    cin >> temp;
                    q.push( temp );
                }else{
                    if( !q.empty() ){
                        cout << q.front() << endl;
                        q.pop();
                    }else{
                        cout << "None" << endl;
                    }
                }
            }
        }else{
            stack<int> q;
            for( int i = 0; i < N; i++ ){
                cin >> s;
                if( strcmp( s, "IN" ) == 0 ){
                    int temp;
                    cin >> temp;
                    q.push( temp );
                }else{
                    if( !q.empty() ){
                        cout << q.top() << endl;
                        q.pop();
                    }else{
                        cout << "None" << endl;
                    }
                }
            }
        }
    }
    return 0;
}