【PAT甲级】1006 Sign In and Sign Out (25 分)

题意：

给出学生人数M，输入M组学生ID，到机房的时间，离开机房的时间。输出最早到机房的学生的ID，空格，最后离开机房的学生的ID。（M大小未给出，就用了1e5）

AAAAAccepted code：

 #include<bits/stdc++.h>
 using namespace std;
 string name[];
 string time1[],time2[];
 pair<int,int>t1[],t2[];
 int main(){
     int n;
     cin>>n;
     for(int i=;i<=n;++i){
         cin>>name[i]>>time1[i]>>time2[i];
         t1[i].second=t2[i].second=i;
         t1[i].first=((time1[i][]-'')*+time1[i][]-'')*+((time1[i][]-'')*+time1[i][]-'')*+(time1[i][]-'')*+time1[i][]-'';
         t2[i].first=((time2[i][]-'')*+time2[i][]-'')*+((time2[i][]-'')*+time2[i][]-'')*+(time2[i][]-'')*+time2[i][]-'';
     }
     sort(t1+,t1++n);
     sort(t2+,t2++n);
     cout<<name[t1[].second]<<" "<<name[t2[n].second];
     return ;
 }