Compilare: user.cpp: In function ‘void DFS(int, int, std::multiset<int, std::less<int>, std::allocator<int> >, std::multiset<int, std::less<int>, std::allocator<int> >)’: user.cpp:43: warning: comparison between signed and unsigned integer expressions user.cpp:17: warning: unused variable ‘j’ user.cpp: In function ‘int main()’: user.cpp:61: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:64: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result