Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:26:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < g[u].size(); ++i) ~~^~~~~~~~~~~~~ user.cpp:50:3: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] for (add = 1; dp[v][add]; ++add); --add; ^~~ user.cpp:50:37: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ for (add = 1; dp[v][add]; ++add); --add; ^~