# 用for循环不就行了吗？
```cpp
#include<bits/stdc++.h>
using namespace std;
int main(){
int a,b=0,c;
for(int i=1;i<=12;i++){
cin>>a;
c+=300-a;
if(c<0){
cout<<"-"<<i<<endl;
return 0;
}
while(c/100!=0){
b++;
c-=100;
}
}
cout<<b*120+c<<endl;
return 0;
}
```
by 123123bao @ 2022-06-07 21:26:48