Compilare: main.cpp: In function 'int main()': main.cpp:41:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<v[coada[st]].size(); i++) ~^~~~~~~~~~~~~~~~~~~~ main.cpp:13:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("amici2.in","r",stdin); ^ main.cpp:14:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("amici2.out","w",stdout); ^