include

using namespace std; typedef long long ll; int main() { ll n,m,i,a[100010],no,sum; cin>>n>>m; for(i=1;i<=n;i++) { cin>>a[i]; } sum=m; for(i=0;i<m;i++) { cin>>no; sum+=no; } if(sum>n) { cout<<"-1"; return 0; } for(i=sum;i<=n;i++) { if(a[i]!=0) { cout<<i; return 0; } } cout<<"-1"; return 0; }

Case: 7 2 0 0 0 0 0 1 2 1 2

This Code's Output: 6

Correct Ans: 7

But this code still got AC.Why?