Compilare: main.cpp: In function 'int main()': main.cpp:98:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int p=0;p<t[j].size() && ok;p++) ~^~~~~~~~~~~~ main.cpp:107:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p==t[j].size()-1) ~^~~~~~~~~~~~~~~ main.cpp:34:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("produse2.in","r",stdin); ^ main.cpp:35:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("produse2.out","w",stdout); ^