Compilare: user.cpp: In function ‘int main()’: user.cpp:6:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define minim(a, b) (a < b ? a : b) ^ user.cpp:55:27: note: in expansion of macro ‘minim’ for (int it = 0; it < minim(1000, ans.size()); ++it) { ^ user.cpp:29:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.in", "r", stdin); ^ user.cpp:30:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.out", "w", stdout); ^