L1-043 阅览室

这题也是写了可长时间：
#include <stdio.h>  
#include <iostream>  
#include <stack>  
#include <string.h>  
#include <queue>  
#include <cmath>  
#include <vector>  
#include <algorithm>  
#include <map>  
#include <set>  
#include <string>  
using namespace std;  
typedef long long LL;  
map<int, char> a;  
map<int, int> b;  
int main() {  
    //freopen("in.txt", "r", stdin);  
    //freopen("out.txt","w",stdout);  
    int n;  
    cin >> n;  
    while(n--){  
        double time = 0;  
        int sum  = 0;  
        a.clear();  
        b.clear();  
        int num, begin, end;  
        char status;  
        while(scanf("%d %c %d:%d", &num, &status, &begin, &end)){  
            if(num == 0) break;  
            if(status == 'S'){  
                a[num] = 'S';  
                b[num] = begin * 60 + end;  
            }  
            if(status == 'E'){  
                if(a[num] == 'S'){  
                    time += begin * 60 + end - b[num];  
                    sum ++;  
                    a[num] = '0';  
                }  
            }  
        }  
        if(sum != 0){  
            time = time / sum;  
        }  
        int t = time + 0.5;  
        printf("%d %d
",sum,t);  
    }  
  
    return 0;  
}