55A - Flea travel - CodeForces Solution

implementation math *1200

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Python Code: 

n=int(input())
if n&(n-1)==0:
    print('YES')
else:
    print('NO')

C++ Code: 

#include<bits/stdc++.h>
using namespace std;
#define ll long long 
int main()
{ 
    ios::sync_with_stdio(false); cin.tie(0);
    // ll int t;cin>>t;

    // for(int kk=0;kk<t;kk++)
    // {
    //     ll int n,m,k;cin>>n>>m>>k;
        
    // }
    int n;cin>>n;
    if(ceil(log2(n)) == floor(log2(n))) cout<<"YES"<<endl;
    else cout<<"NO"<<endl;
    
}


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