Eroare de compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:14:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<gr[k].size(); i++) ^ user.cpp: In function ‘void dfs2(int, int)’: user.cpp:29:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<gr[k].size(); i++) ^ user.cpp:31:7: error: ‘viz’ was not declared in this scope if(!viz[gr[k][i]]) ^ user.cpp:33:3: error: ‘viz’ was not declared in this scope viz[gr[k][i]]=1; ^