poj 3751 时间日期格式转换

#include <iostream>        //水题
using namespace std;    //12:00pm 表示正午，12:00am表示午夜
int main()
{
    int t,y,mm,d,h,m,s,tag;char ch[2][3]={"am","pm"};
    cin>>t;
    while(t--)
    {
        scanf("%d/%d/%d-%d:%d:%d",&y,&mm,&d,&h,&m,&s);
        if(h<12)
            tag=0,h=(h==0)?12:h;
        else
            tag=1,h=(h==12)?12:h-12;
        printf("%02d/%02d/%04d-%02d:%02d:%02d%s\n",mm,d,y,h,m,s,ch[tag]);
    }
    return 0;
}