PAT 1006 Sign In and Sign Out

#include<iostream>

#include<cstring>

using namespace std;

 

 

int main()

{

    char stu_in[15],stu_out[15],stu[15];

    char sign_in[10] = "23:59:59";

    char sign_out[10] = "00:00:00";

    char tmp_in[10],tmp_out[10];

    int num,i;

 

    cin>>num;

    for(i=0; i<num; i++)

    {

        cin>>stu>>tmp_in>>tmp_out;

        if(strcmp(tmp_in,sign_in) <= 0)

        {

            strcpy(stu_in,stu);

            strcpy(sign_in,tmp_in);

        }

        if(strcmp(tmp_out, sign_out) >= 0)

        {

            strcpy(stu_out,stu);

            strcpy(sign_out,tmp_out);

        }

    }

    cout<<stu_in<<" "<<stu_out<<endl;

    return 0;

}