pat甲级打卡-1006 Sign In and Sign Out

#include<bits/stdc++.h>
using namespace std;
int mina=25,minb=25,minc=25;
int maxa=-1,maxb=-1,maxc=-1;
string minstr,maxstr;
int m;
int main(){
    cin>>m;
    while(m--){
        string s,s1,s2;
        int a,b,c,d,e,f;
        cin>>s>>s1>>s2;
       a=stoi(s1.substr(0,2)); 
       b=stoi(s1.substr(3,2));
       c=stoi(s1.substr(6,2));
        
       d=stoi(s2.substr(0,2));
       e=stoi(s2.substr(3,2));
       f=stoi(s2.substr(6,2));
        
       //cout<<a<<" "<<b<<" "<<c<<" "<<d<<" "<<e<<" "<<f<<endl;
        if(mina>a){
            minstr=s;
            mina=a,minb=b,minc=c;
        }else if(mina==a){
            if(minb>b){
                minstr=s;
                mina=a,minb=b,minc=c;
            }else if(minb==b){
                if(minc>c){
                    minstr=s;
                    mina=a,minb=b,minc=c;
                } 
            }
        }
        
        if(maxa<d){
            maxstr=s;
            maxa=d,maxb=e,maxc=f;
        }else if(maxa==d){
            if(maxb<e){
                maxstr=s;
                maxa=d,maxb=e,maxc=f;
            }else if(maxb==e){
                if(maxc<f) {
                      maxstr=s;maxa=d,maxb=e,maxc=f;
                }
            }
        }
    }
    cout<<minstr<<" "<<maxstr;
    
    
    return 0;
}