結果
問題 | No.2301 Namorientation |
ユーザー |
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提出日時 | 2023-05-13 11:59:40 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 528 ms / 3,000 ms |
コード長 | 3,933 bytes |
コンパイル時間 | 1,163 ms |
コンパイル使用メモリ | 120,716 KB |
最終ジャッジ日時 | 2025-02-13 00:00:50 |
ジャッジサーバーID (参考情報) |
judge2 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 30 |
ソースコード
#include <iostream>#include <vector>#include <algorithm>#include <map>#include <queue>#include <set>#include <random>#include <iomanip>#include <string>#include <cmath>#include <complex>using namespace std;typedef long long ll;#define rep(i, n) for(int i = 0; i < (n); i++)template<class T>using vi = vector<T>;template<class T>using vii = vector<vi<T>>;template<class T>using viii = vector<vii<T>>;template<class T>using viiii = vector<viii<T>>;using P = pair<ll, int>;void chmin(ll & x, ll y) { x = min(x, y); }void chmax(ll& x, ll y) { x = max(x, y); }struct mint {const long long mod = 998244353;long long x;mint(long long x_ = 0) : x((x_% mod + mod) % mod) {}mint& operator+=(const mint& other) {x += other.x;if (x >= mod) x -= mod;return *this;}mint& operator-=(const mint& other) {x -= other.x;if (x < 0) x += mod;return *this;}mint& operator*=(const mint& other) {x *= other.x;x %= mod;return *this;}mint& operator+=(const long long n) {return *this += mint(n);}mint& operator-=(const long long n) {return *this -= mint(n);}mint& operator*=(const long long n) {return *this *= mint(n);}mint& operator=(const mint& other) {x = other.x;return *this;}mint& operator=(const long long n) {x = n % mod;return *this;}bool operator==(const mint& other) const {return x == other.x;}bool operator!=(const mint& other) const {return x != other.x;}mint operator-() const {mint res(mod - x);return res;}mint operator+(const mint& other) const {mint res(x);return res += other;}mint operator-(const mint& other) const {mint res(x);return res -= other;}mint operator*(const mint& other) const {mint res(x);return res *= other;}mint operator+(const long long n) const {mint res(x);mint other(n);return res += other;}mint operator-(const long long n) const {mint res(x);mint other(n);return res -= other;}mint operator*(const long long n) const {mint res(x);mint other(n);return res *= other;}mint pow(long long n) const {if (n == 0) return mint(1);mint res = pow(n / 2);res *= res;if (n % 2) res *= *this;return res;}mint inv() const {return pow(mod - 2);}mint& operator/=(const mint& other) {*this *= other.inv();return *this;}mint operator/(const mint& other) const {mint res(x);return res /= other;}};struct edge {int to, idx;};int dfs(int v, int p, vii<edge>& to, vi<bool>& visited) {int res = -1;visited[v] = true;for (edge nv : to[v]) {if (nv.to == p) continue;if (visited[nv.to]) return nv.idx;res = max(res, dfs(nv.to, v, to, visited));}return res;}void dfs2(int v, vii<edge>& to, vi<bool>& visited, vi<bool>& ans) {visited[v] = true;for (edge nv : to[v]) {if (visited[nv.to]) continue;if (v > nv.to) ans[nv.idx] = true;dfs2(nv.to, to, visited, ans);}}int main(){int n;cin >> n;vi<int> a(n), b(n);vii<edge> to(n);rep(i, n) {cin >> a[i] >> b[i];a[i]--, b[i]--;to[a[i]].push_back({ b[i], i });to[b[i]].push_back({ a[i], i });}vi<bool> visited(n);int pos = dfs(0, -1, to, visited);rep(i, n) visited[i] = false;vi<bool> ans(n);int rt = b[pos];dfs2(rt, to, visited, ans);rep(i, n) cout << (ans[i] ? "->" : "<-") << endl;return 0;}