HDU 1036 - Average is not Fast Enough!

加起来除一下

然后四舍五入？反正这样过了

#include <iostream>
#include <cmath>
using namespace std;
int n;
double d,t;
int name,h;
char c[10];
bool flag;
int main()
{
    cin>>n>>d;
    int cnt=0;
    while(cin>>name)
    {
        t=0;
        flag=1;
        for(int i=1;i<=n;i++)
        {
            cin>>c;
            if(c[0]=='-') flag=0;
            if(flag)
            {
                t+=(c[0]-'0')*60*60;
                t+=((c[2]-'0')*10+c[3]-'0')*60;
                t+=((c[5]-'0')*10+c[6]-'0');                
            }
        }
        if(!flag){
            printf("%3d: -
",name);
            continue;
        }
        t=int((t/d)+0.5);
        printf("%3d:%2d:%02d min/km
",name,(int)t/60,(int)t%60);
    }
}