Compilare: user.cpp: In function ‘int main()’: user.cpp:63:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < adjList[N + N + 1].size(); j++) ^ user.cpp:15:15: warning: unused variable ‘x’ [-Wunused-variable] int N, i, x, y, j; ^ user.cpp:15:18: warning: unused variable ‘y’ [-Wunused-variable] int N, i, x, y, j; ^ user.cpp: In function ‘bool BFS(int, int, std::vector<int>*, int (*)[202], int (*)[202], int*, bool*)’: user.cpp:120:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < adjList[x].size(); i++) ^