PAT 1006. Sign In and Sign Out (25)

#include <stdio.h>#include <string.h>int early,late,n;char earlyP[20],lateP[20];int time(int hh,int mm,int ss){    int ans=hh*60*60+mm*60+ss;    return ans;}int main(){    //freopen("/Users/pantingting/Documents/code/data/input", "r", stdin);    early=123123123;    late=0;    scanf("%d",&n);    char tmp[20];    int hh,mm,ss;    int t;    for (int i=0; i<n; i++) {        scanf("%s",tmp);        scanf("%d:%d:%d",&hh,&mm,&ss);        t=time(hh, mm, ss);        if (t<early) {            strcpy(earlyP,tmp);            early=t;        }        scanf("%d:%d:%d",&hh,&mm,&ss);        t=time(hh, mm, ss);        if (t>late) {            strcpy(lateP,tmp);            late=t;        }    }    printf("%s %s\n",earlyP,lateP);    return 0;}