Compilare: main.cpp: In function 'int main()': main.cpp:46:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for (int v = 0; v < g[u].size(); ++v) | ~~^~~~~~~~~~~~~ main.cpp:66:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | for (int v = 0; v < g[u].size(); ++v) | ~~^~~~~~~~~~~~~ main.cpp:14:27: warning: unused variable 'j' [-Wunused-variable] 14 | int n, m, x, y, c, i, j; | ^