859B - Lazy Security Guard - CodeForces Solution

brute force geometry math *1000

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C++ Code: 

#include<bits/stdc++.h>
using namespace std;

int main()
{
    long long int n,t,x, y;

    cin>>n;

    x = ceil(sqrt(n));

    y = ceil((double)n/(double)x);

    cout<<2*(x+y)<<endl;

}


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