Compilare: main.cpp: In function 'void dfs2(int, int, int)': main.cpp:42:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | for(int h=0;h<v[x].size();++h) | ~^~~~~~~~~~~~ main.cpp: In function 'void up(int, int, int)': main.cpp:62:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for(int h=0;h<v[x].size();++h) | ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:128:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 128 | for(int h=0;h<s[nod].size();++h) | ~^~~~~~~~~~~~~~