Compilare: user.cpp: In function ‘int main()’: user.cpp:65:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 2; i < zrs.size(); ++ i) { ~~^~~~~~~~~~~~ user.cpp:71:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i + 1 == zrs.size() && k < b) ~~~~~~^~~~~~~~~~~~~ user.cpp:28:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("antivirus.in", "r", stdin); ^ user.cpp:29:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("antivirus.out", "w", stdout); ^