Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:66:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(top > 0 && Stack[top].second == G[Stack[top].first].size() - 1) ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ user.cpp:74:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(top2 > 0 && Stack2[top2].second == G[Stack2[top2].first].size() - 1) ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ user.cpp:96:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < X.size(); i++) ~~^~~~~~~~~~ user.cpp:108:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < X2.size(); i++) ~~^~~~~~~~~~~