Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:28:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < graph[nod].size(); ++i) ^ user.cpp:26:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, prod = 1; ^ user.cpp: In function ‘int main()’: user.cpp:63:22: warning: ‘ret’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << dp[ret][1]; ^