Compilare: user.cpp: In function ‘void MarkVertex(std::vector<std::vector<int> >&, std::vector<int>&, std::vector<bool>&, std::queue<int>&, std::vector<int>&, std::vector<bool>&, int)’: user.cpp:49:85: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(marked[*itr] == true && inQ[*itr] == false && G[*itr].size() > markedGrade[*itr]) ^ user.cpp:51:76: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(value[*itr] == 0 || value[*itr] > (G[*itr].size() - markedGrade[*itr])) ^ user.cpp: In function ‘std::vector<int> Solve(std::vector<std::vector<int> >&, std::vector<int>&, std::vector<bool>&, int, int)’: user.cpp:83:65: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(!(value[x] == 0 || value[x] > (G[x].size() - markedGrade[x]))) ^