Compilare: user.cpp: In function ‘int main()’: user.cpp:54:41: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(j = find_Hash(x[i], y[i] - 1)){ ^ user.cpp:57:41: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(j = find_Hash(x[i] - 1, y[i])){ ^ user.cpp:60:41: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(j = find_Hash(x[i] + 1, y[i])){ ^ user.cpp:63:41: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(j = find_Hash(x[i], y[i] + 1)){ ^ user.cpp:44:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("banana.in", "r", stdin); ^ user.cpp:45:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("banana.out", "w", stdout); ^ user.cpp:46:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ user.cpp:48:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x[i], &y[i]); ^