Compilare: main.cpp: In function 'void dfs(std::vector<int>&, int, int, int&)': main.cpp:40:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(int i=0;i<adj_list[node].size();i++){ | ~^~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void read()': main.cpp:68:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 68 | for(int j=0;j<leaves.size();j++){ | ~^~~~~~~~~~~~~~ main.cpp:69:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 69 | for(int k=0;k<adj_list[leaves[j]].size();k++) | ~^~~~~~~~~~~~~~~~~~~~~~~~~~~