Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:34:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for(int i=0;i<L[x].size();i++) | ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:85:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | for(j=0;j<ccb[i].size();j++) | ~^~~~~~~~~~~~~~