Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:19:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for(int i = 0; i < v[node].size(); i++) { | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void erase_leaves()': main.cpp:37:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for(int it = 0; it < v[i].size(); it++) | ~~~^~~~~~~~~~~~~