結果
問題 | No.1817 Reversed Edges |
ユーザー |
![]() |
提出日時 | 2022-01-21 22:36:29 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 122 ms / 2,000 ms |
コード長 | 2,309 bytes |
コンパイル時間 | 3,264 ms |
コンパイル使用メモリ | 175,864 KB |
最終ジャッジ日時 | 2025-01-27 14:10:21 |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 23 |
ソースコード
#include <algorithm>#include <bitset>#include <cassert>#include <cmath>#include <cstdio>#include <fstream>#include <functional>#include <iomanip>#include <iostream>#include <iterator>#include <map>#include <numeric>#include <queue>#include <set>#include <sstream>#include <stack>#include <unordered_set>using namespace std;#if __has_include(<atcoder/all>)#include <atcoder/all>using namespace atcoder;#endif#define GET_MACRO(_1, _2, _3, NAME, ...) NAME#define _rep(i, n) _rep2(i, 0, n)#define _rep2(i, a, b) for(int i = (int)(a); i < (int)(b); i++)#define rep(...) GET_MACRO(__VA_ARGS__, _rep2, _rep)(__VA_ARGS__)#define all(x) (x).begin(), (x).end()#define rall(x) (x).rbegin(), (x).rend()using i64 = long long;template<class T, class U>bool chmin(T& a, const U& b) { return (b < a) ? (a = b, true) : false; }template<class T, class U>bool chmax(T& a, const U& b) { return (b > a) ? (a = b, true) : false; }inline void YesNo(bool f) { std::cout << (f? "Yes": "No") << std::endl; }template<typename T>istream& operator>>(istream&i,vector<T>&v){rep(j,v.size())i>>v[j];return i;}template<typename T>string join(vector<T>&v){stringstream s;rep(i,v.size())s<<' '<<v[i];return s.str().substr(1);}template<typename T>ostream& operator<<(ostream&o,vector<T>&v){if(v.size())o<<join(v);return o;}template<typename T>string join(vector<vector<T>>&vv){string s="\n";rep(i,vv.size())s+=join(vv[i])+"\n";return s;}template<typename T>ostream& operator<<(ostream&o,vector<vector<T>>&vv){if(vv.size())o<<join(vv);return o;}vector<int> edge[100010];int ans[100010];int dfs(int now, int p){int res = 0;for (auto e: edge[now]){if (e == p) continue;if (now > e){res++;}res += dfs(e, now);}return res;}void dfs2(int now, int p){for (auto e: edge[now]){if (e == p) continue;if (now > e){ans[e] = ans[now] - 1;}else{ans[e] = ans[now] + 1;}dfs2(e, now);}}int main(){int n;cin >> n;rep(i, n - 1){int a, b;cin >> a >> b;a--, b--;edge[a].emplace_back(b);edge[b].emplace_back(a);}ans[0] = dfs(0, -1);dfs2(0, -1);rep(i, n) cout << ans[i] << "\n";}