Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:24:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for(int i=0; i<g[nod].size(); i++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int altdfs(int, int)': main.cpp:61:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for(int i=0; i<g[nod].size(); i++) | ~^~~~~~~~~~~~~~ main.cpp:70:1: warning: control reaches end of non-void function [-Wreturn-type] 70 | } | ^