// Example program
#include <iostream>
#include <string>
#include <cmath>
using namespace std;

bool isSquare(long long n){
    long long squareRootN=(long long)round((sqrt(n)));

    if(squareRootN*squareRootN == n) {
        return true;
    }
     else {
        return false;
     }
}
int main(){
    long long  n;

    cin>>n;
    int count = 0;
    for (long long i = 1; i<n; i++){
        if (isSquare(i)){
            count++;
            }
        }
    cout<<n<<" : "<<count<<endl;
}