蒟蒻p1089求条

#include<iostream>
using namespace std;
int main(){
    int a[12],m,mt,mum;
    bool flag=1;
    cin>>a[1]>>a[2]>>a[3]>>a[4]>>a[5]>>a[6]>>a[7]>>a[8]>>a[9]>>a[10]>>a[11]>>a[12];
    for(int i=0;i<12;i++){
        m+=300;
        m-=a[i];
        if(m<0){
            mt=i+1;
            flag=0;
            break;
        }
        mum+=m/100;
        m-=m/100*100;
    }
    if(!flag){
        cout<<-mt;
    }
    else{
        cout<<m+mum*120;
    }
    return 0;
}