Compilare: user.cpp: In function ‘int main()’: user.cpp:90:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<g[nod].size();j++) ~^~~~~~~~~~~~~~ user.cpp:102:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<g[nod].size();j++) ~^~~~~~~~~~~~~~ user.cpp: In function ‘void inc()’: user.cpp:38:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(pars,1,Buffer,stdin); ^ user.cpp: In function ‘int main()’: user.cpp:52:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("countfefete.in","r",stdin); ^ user.cpp:53:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("countfefete.out","w",stdout); ^ user.cpp:54:31: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(pars,1,Buffer,stdin); ^