hdu1036

#include<stdio.h> int main() { int n; double d; int num; char h,m1,m2,s1,s2; scanf("%d",&n); scanf("%lf",&d); while(scanf("%d",&num)!=EOF) { printf("%3d: ",num); bool flag=true; int sumtime=0; for(int i=0;i<n;i++) {getchar(); scanf("%c:%c%c:%c%c",&h,&m1,&m2,&s1,&s2); if(h=='-') flag=false; if(flag==false)continue; sumtime+=(h-'0')*3600+((m1-'0')*10+(m2-'0'))*60+(s1-'0')*10+(s2-'0'); } if(flag==false)printf("-\n"); else { double t1=sumtime/d; int t2=(int)(t1+0.5); printf("%d:%02d min/km\n",t2/60,t2%60); } } return 0; }