Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:59:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp: In function ‘void precalcTree()’: user.cpp:104:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < GG[i].size(); j++) ^ user.cpp:111:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < Bic[i].size(); j++) ^ user.cpp: In function ‘void DFS2(int)’: user.cpp:118:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < GG[node].size(); i++) ^ user.cpp:135:57: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < G[Bic[node][j]].size(); k++) ^ user.cpp:157:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < GG[node].size(); j++) ^ user.cpp: In function ‘void DFS3(int, int)’: user.cpp:194:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < GG[node].size(); j++) ^ user.cpp:196:57: warning: unused variable ‘x’ [-Wunused-variable] int f = Pos[node][F2[GG[node][j]]] - 1, x = F2[GG[node][j]]; ^ user.cpp: In function ‘int main()’: user.cpp:209:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < GG[i].size(); j++) ^