Compilare: main.cpp: In function 'bool dfs1(int, int)': main.cpp:16:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for( int i = 0; i < adj[u].size(); i++ ){ | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int, int, int)': main.cpp:32:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | for( int i = 0; i < adj[u].size(); i++ ){ | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:42:32: warning: variable 'start' set but not used [-Wunused-but-set-variable] 42 | int n, u, v, i, k, nod, x, start, cnt; | ^~~~~