Compilare: main.cpp: In function 'void dfs(int)': main.cpp:18:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | for (int i = 0; i < v[k].size(); i++) | ~~^~~~~~~~~~~~~ main.cpp: In function 'void dfst(int)': main.cpp:30:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for (int i = 0; i < vt[k].size(); i++) | ~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:61:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for (i = 0; i < ctct.size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:63:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | for (x = 0; x < ctct[i].size(); x++) | ~~^~~~~~~~~~~~~~~~