答案在这

#include<bits/stdc++.h>
using namespace std;
int a,b,c,maxn,day;
int main(){
for(int i = 1;i <= 7;i++)
{
cin >> a >> b;
c = a + b;
if(c > maxn && c > 8)
{
maxn = c;
day = i;
}
}
cout << day;
return 0;
}