Compilare: main.cpp: In function 'void dfs(int)': main.cpp:35:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<int, int>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for (int i=0;i<q[nod].size();++i) | ~^~~~~~~~~~~~~~ main.cpp:39:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<int, int>, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for (int i=0;i<v[nod].size();++i) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:50:39: warning: operation on 'poz[0]' may be undefined [-Wsequence-point] 50 | if (cer==1) {in>>x>>y>>z; poz[++poz[0]]=poz[0]; v[poz[poz[0]-1]].push_back({{poz[0],z},{x,y}});} | ^~~~~~~~ main.cpp:52:26: warning: operation on 'poz[0]' may be undefined [-Wsequence-point] 52 | else {in>>x; poz[++poz[0]]=poz[poz[0]-1-x];} | ^~~~~~~~