Eroare de compilare: user.cpp: In function ‘int dfs1(int)’: user.cpp:31:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vec[x].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:63:13: error: ‘j’ was not declared in this scope int(j = 1; j++ <= n; j++) ^ user.cpp:63:33: error: expected ‘;’ before ‘)’ token int(j = 1; j++ <= n; j++) ^