#include<iostream>
#include<cstdlib>
#include<cmath>
using namespace std;

int main(void){
    long N;
    long *b;
    long i;
    long double m;
    cin>>N;
    b=new long[N];
    for(i=0;i<N;i++){
        cin>>b[i];
    }
    for(i=0;i<N;i++){
        m=(sqrt(long double(8.0*long double(b[i])-7.0))-1.0)/2.0;
        if(fabs(m-ceil(m))<0.0001) if(i!=N-1){cout<<"1"<<" ";} else{cout<<"1";}
        else if(i!=N-1)cout<<"0"<<" ";else{cout<<"0";}
    }

    cout<<endl;
    system("pause");
    return 0;
}


Why WA#3?

low accuary i think, work with integers numbers

in 3 test need use LONG...