Compilare: main.cpp: In function 'void dfs1(int)': main.cpp:14:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | for (int i=0;i<l[nod].size();i++) { | ~^~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int, int, int)': main.cpp:55:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 55 | for (int i=0;i<l[nod].size();i++) { | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:69:25: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 69 | viz[i]=l1[i]=l2[i]=fiu[i]=0; | ~~~~~^~~~~~~~~~~~~~~