Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:23:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[Node].size(); ++ i) ^ user.cpp: In function ‘int main()’: user.cpp:99:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Euler.size() - 1; ++ i) ^ user.cpp:119:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(Ans.size() != N) ^ user.cpp:125:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Ans.size(); ++ i) ^