Compilare: main.cpp: In function 'int main()': main.cpp:24:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=i;j<=n && crt < Q.size(); j++){ ~~~~^~~~~~~~~~ main.cpp:27:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (crt >= Q.size()){ ~~~~^~~~~~~~~~~ main.cpp:11:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("secv.in","r",stdin); ^ main.cpp:12:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("secv.out","w",stdout); ^