Compilare: user.cpp: In function ‘void dfst(int)’: user.cpp:20:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<gt[x].size();i++) ^ user.cpp: In function ‘void dfs(int)’: user.cpp:28:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[x].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:35:8: warning: unused variable ‘j’ [-Wunused-variable] {int i,j,n,m,x,y; ^