Compilare: main.cpp: In function 'int main()': main.cpp:62:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(rez.size()!=m+1) ~~~~~~~~~~^~~~~ main.cpp:64:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else for(i=0;i<rez.size()-1;i++) ~^~~~~~~~~~~~~ main.cpp:21:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ciclueuler.in","r",stdin); ^ main.cpp:22:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ciclueuler.out","w",stdout); ^