Compilare: main.cpp: In function 'int dfs(int)': main.cpp:18:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | for(int i=0;i<v[x].size();i++) | ~^~~~~~~~~~~~ main.cpp:40:1: warning: no return statement in function returning non-void [-Wreturn-type] 40 | } | ^ main.cpp: In function 'int main()': main.cpp:54:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for(j=0;j<sol[i].size();j++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int dfs(int)': main.cpp:11:5: warning: infinite recursion detected [-Winfinite-recursion] 11 | int dfs(int x) | ^~~ main.cpp:21:16: note: recursive call 21 | dfs(v[x][i]); | ~~~^~~~~~~~~