結果
問題 | No.2301 Namorientation |
ユーザー |
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提出日時 | 2023-05-12 22:15:59 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,081 bytes |
コンパイル時間 | 1,215 ms |
コンパイル使用メモリ | 123,804 KB |
最終ジャッジ日時 | 2025-02-12 23:04:59 |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 10 WA * 20 |
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>>;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 main(){int n;cin >> n;vi<int> a(n), b(n);vii<edge> to(n);vi<int> deg(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 });deg[a[i]]++, deg[b[i]]++;}queue<int> q;rep(i, n) {if (deg[i] == 1) q.push(i);}vi<int> ans(n);vi<bool> visited(n);while (!q.empty()) {int v = q.front();q.pop();visited[v] = true;edge nv = to[v].front();if (v > nv.to) ans[nv.idx] = 1;else ans[nv.idx] = -1;deg[nv.to]--;if (deg[nv.to] == 1) q.push(nv.to);}rep(i, n) {if (visited[i]) continue;q.push(i);while (!q.empty()) {int v = q.front();q.pop();visited[v] = true;for (edge nv : to[v]) {if (ans[nv.idx] != 0) continue;if (v > nv.to) ans[nv.idx] = 1;else ans[nv.idx] = -1;q.push(nv.to);break;}}break;}rep(i, n) cout << (ans[i] == 1 ? "<-" : "->") << endl;return 0;}