你的i是比月份小1的，
cout<<-(i+1)就行了
by jiajiaaixue @ 2023-01-14 10:17:05
```
#include<iostream>
using namespace std;
int main()
{
int x=0,n,m=0,c=0;
for(int x=1;x<=12;x++)
{
cin>>n;
m=m+300-n;
c=c+m/100;
m=m%100;
if(m<0)
{
cout<<-x;
return 0;
}
}
cout<<m+100*c*1.2;
return 0;
}
```
by wuzehui123456 @ 2023-02-02 16:20:15
```cpp
#include<bits/stdc++.h>
using namespace std;
int mo[13];
int money,mum,l,v,ll;
int main()
{
for(int i=1;i<=12;i++)
{
cin>>mo[i];
if(ll==0)
{
money+=300;
if(mo[i]>money)
{
v=i;ll=1;
}
else money-=mo[i];
if(money/100!=0)
{
l=money/100;
mum+=l*100;
money-=l*100;
}
if(i==12&&v==0) {cout<<mum*1.2+money;return 0;}
}
}
cout<<"-"<<v;
return 0;
}
```
by ceqowows @ 2023-02-19 11:52:43
@[jiajiaaixue](/user/717627) 通过了，谢谢！
by wangyb2011 @ 2023-04-03 19:19:24