编译失败QWQ

#include<bits/stdc++.h>
using namespace std;
long long n,a,b,he,jian{
    cin>>n;
    for(int i=1'i<=n;i++){
        cin>>a>>b;
        jian=jian+A+b-8;
        he+=jian;
    }
    cout<<he;
    return 0;
}