Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:53:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graph[node].size();i++) ^ user.cpp: In function ‘int Solve(int)’: user.cpp:83:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<Graph[Comp[c][i]].size();k++) ^ user.cpp: In function ‘int main()’: user.cpp:113:22: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,1,MAX,IN); ^ user.cpp: In function ‘void Read(int&)’: user.cpp:26:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,MAX,1,IN),pos=0; ^ user.cpp:32:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,MAX,1,IN),pos=0; ^