Compilare: user.cpp: In member function ‘void Tree::dfs(int)’: user.cpp:71:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i - 1 > dp[v].size()) break; ~~~~~~^~~~~~~~~~~~~~ user.cpp:72:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i - 1 == dp[v].size()) ~~~~~~^~~~~~~~~~~~~~~ user.cpp:65:5: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation] if (sons[u].size()) ^~ user.cpp:84:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’ for (int v : sons[u]) ^~~ user.cpp: In function ‘int main()’: user.cpp:92:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:98:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &val); ^ user.cpp:106:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &u); ^