1 #include <iostream> 2 #include <cstdio> 3 #include <cmath> 4 using namespace std; 5 int main () 6 { 7    int x,n,p; 8    while(cin>>n) 9    {10        if (n==0)11        break;12        x=p=1;13        int sum=0;14        while(x<=n)15        {16            for(int i=x;i<x+p&&i<=n;i++)17            sum+=p;18            x=x+p;19            p++;20        }21        cout<<n<<" "<<sum<<endl;22    }23    return 0;24 }