Compilare: user.cpp: In function ‘int main()’: user.cpp:17:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int cntrlKey = 1; p <= y; ++cntrlKey) { ^ user.cpp:21:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (key * p >= x && key * p <= y) ^ user.cpp:21:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (key * p >= x && key * p <= y) ^ user.cpp:9:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("taste.in", "r", stdin); ^ user.cpp:10:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("taste.out", "w", stdout); ^ user.cpp:12:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld", &x, &y); ^