Compilare: user.cpp: In function ‘bool ok(long long int)’: user.cpp:24:29: warning: unused variable ‘hB’ [-Wunused-variable] long long hA = val / A, hB = min(val / B, (long long)N), j; ^ user.cpp:24:62: warning: unused variable ‘j’ [-Wunused-variable] long long hA = val / A, hB = min(val / B, (long long)N), j; ^ user.cpp: In function ‘int main()’: user.cpp:94:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("provocare.in", "r", stdin); ^ user.cpp:95:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("provocare.out", "w", stdout); ^ user.cpp:97:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &tests); ^ user.cpp:99:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &N, &A, &B); ^