Compilare: user.cpp: In function ‘int Solve(int)’: user.cpp:48:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<Graph[node].size();j++) ^ user.cpp: In function ‘int main()’: user.cpp:71:22: 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:23:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,1,MAX,IN),pos=0; ^ user.cpp:30:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,1,MAX,IN),pos=0; ^