Compilare: user.cpp: In function ‘int countAccess(std::pair<int, int>)’: user.cpp:61:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<adj[p.f][p.s].size();i++) { ^ user.cpp: In function ‘int findCoresp(std::pair<int, int>, std::pair<int, int>)’: user.cpp:72:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<adj[p2.f][p2.s].size();i++) { ^ user.cpp: In function ‘void printPath()’: user.cpp:87:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<adj[p.f][p.s].size()&&!ok;i++) { ^ user.cpp: In function ‘std::pair<int, int> findEntrance()’: user.cpp:47:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int findCoresp(std::pair<int, int>, std::pair<int, int>)’: user.cpp:77:1: warning: control reaches end of non-void function [-Wreturn-type] } ^