#include <bits/stdc++.h>   using namespace std;   using namespace std;   int get_type(int a, int b, int c) {     if (a == 0 && b == 0 && c != 0) return 0;     if (a == 0 && b == 0 && c == 0) return -1;     if (a == 0) return 1;     if (b == 0) return 2;     return 3;   }   int main() {     int a1, b1, c1, a2, b2, c2;     cin >> a1 >> b1 >> c1 >> a2 >> b2 >> c2;     int t1 = get_type(a1, b1, c1);     int t2 = get_type(a2, b2, c2);     if (t1 == 0 || t2 == 0)       cout <<  0 ;     else if (t1 == -1 || t2 == -1)       cout <<  -1 ;     else if (t1 != t2)       cout <<  1 ;     else {       if (t1 == 1) {         if (c1 * b2 == c2 * b1)           cout <<  -1 ;         else           cout <<  0 ;       } else if (t1 == 2) {         if (c1 * a2 == c2 * a1)           cout <<  -1 ;         else           cout <<  0 ;       } else {         if (b1 * a2 != a1 * b2)           cout <<  1 ;         else {           if (c1 * b2 == c2 * b1)             cout <<  -1 ;           else             cout <<  0 ;         }       }     }     return 0;   }   