Compilare: user.cpp: In function ‘void Write()’: user.cpp:20:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<Answer.size();i++) { ^ user.cpp:22:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<Answer[i].size();j++) ^ user.cpp: In function ‘void Euler(int)’: user.cpp:39:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(it[Nod]<G[Nod].size()) { ^ user.cpp:47:64: warning: operation on ‘it[Nod]’ may be undefined [-Wsequence-point] Euler( X[G[Nod][it[Nod]]] + Y[G[Nod][it[Nod]++]] - Nod); ^ user.cpp: In function ‘void DFS(int)’: user.cpp:63:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[Nod].size();i++) ^ user.cpp: In function ‘void Solve()’: user.cpp:82:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<Component.size();j++) { ^