Compilare: user.cpp: In function ‘int main()’: user.cpp:14:18: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if((x1&1 != x2&1) || (y1&1 != y2&1)) printf("0\n"); ^ user.cpp:14:36: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if((x1&1 != x2&1) || (y1&1 != y2&1)) printf("0\n"); ^ user.cpp:7:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("taxi.in", "r", stdin); ^ user.cpp:8:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("taxi.out", "w", stdout); ^ user.cpp:10:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp:13:63: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d %d %d", &a, &b, &x1, &y1, &x2, &y2); ^