Compilare: main.cpp: In function 'int main()': main.cpp:40:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<v.size(); j++) ~^~~~~~~~~ main.cpp:23:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("stele.in","r",stdin); ^ main.cpp:24:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("stele.out","w",stdout); ^