Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:15:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for(i = 0; i < edge[x][y].size(); i++){ | ~~^~~~~~~~~~~~~~~~~~~ main.cpp:19:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for(j = 0; j < depinde[xn][yn].size(); j++) | ~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:30:18: warning: unused variable 'l' [-Wunused-variable] 30 | int n, i, j, l, k; | ^