Compilare: main.cpp: In function 'void disconnect(int, int)': main.cpp:28:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | while( ix[na] < adj[na].size() && | ~~~~~~~^~~~~~~~~~~~~~~~ main.cpp:31:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | if(ix[na] == adj[na].size()) stka.pop(); | ~~~~~~~^~~~~~~~~~~~~~~~~ main.cpp:38:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | while(ix[nb]<adj[nb].size()&& | ~~~~~~^~~~~~~~~~~~~~~ main.cpp:41:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | if(ix[nb]==adj[nb].size()) stkb.pop(); | ~~~~~~^~~~~~~~~~~~~~~~