#include <bits/stdc++.h>
using namespace std;
int main(){
    double distancia,velGuard,velFuj;
    while(cin>>distancia){
        cin>>velFuj;
        cin>>velGuard;
        double v2 = (double)(distancia*distancia)+(velFuj*velFuj);
        double time1 = (double)12.0/velFuj;
        double time2 = (double)v2/(velGuard*velGuard);
        if(time1>=time2){
            cout<<"S"<<"\n";
        }
        else{
            cout<<"N"<<"\n";
        }
    }
}