#include <bits/stdc++.h>   using namespace std;   int main() {     int x, y, z;     cin >> x >> y >> z;     int total = x - y;     if (total < 0) {       if (total + z < 0) {         cout <<  - ;       } else {         cout <<  ? ;       }     }     if (total > 0) {       if (total - z > 0) {         cout <<  + ;       } else {         cout <<  ? ;       }     }     if (total == 0) {       if (total + z == 0) {         cout <<  0 ;       } else {         cout <<  ? ;       }     }     return 0;   }   