#include <iostream>
#include<bits/stdc++.h>
using namespace std;
int main() {
// your code goes here
vector<int>arr={1,1,1,1,2};
int k=3;
int maxlen=0;
for(int i=0;i<arr.size();i++){
int sum=0;
for(int j=i;j<arr.size();j++){
sum+=arr[j];
if(sum==k){
maxlen=max(maxlen,j-i+1);
}
}
}
cout<<maxlen;
return 0;
}
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