#include <bits/stdc++.h>
using namespace std;
#define ll long long
ll t, k, i, x, y, z, b;
int main ()
{
    cin >> t >> k;
    for (i=0; i<t; i++){
        ll m, n;
        cin >> m >> n;
        x=min(m,n);
        y=min(m,n);
        z=max(m,n);
        k++;
        if (x%k==0) x--;
        x/=k;
        b=x;
        x*=k;
        y-=x;
        z-=x;
        z+=(b+y-2);
        cout << ((z%2==0) ? "-" : "+") << endl;
    }
    return 0;
}