結果
問題 | No.1553 Lovely City |
ユーザー | au7777 |
提出日時 | 2021-12-16 19:07:35 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,068 bytes |
コンパイル時間 | 4,154 ms |
コンパイル使用メモリ | 245,772 KB |
実行使用メモリ | 30,076 KB |
最終ジャッジ日時 | 2024-09-13 16:51:32 |
合計ジャッジ時間 | 24,206 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 5 ms
8,192 KB |
testcase_01 | AC | 5 ms
8,320 KB |
testcase_02 | WA | - |
testcase_03 | WA | - |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | RE | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | WA | - |
testcase_25 | WA | - |
testcase_26 | WA | - |
testcase_27 | WA | - |
ソースコード
#include <bits/stdc++.h> #include <atcoder/all> typedef long long int ll; typedef long long int ull; #define MP make_pair using namespace std; using namespace atcoder; typedef pair<ll, ll> P; const ll MOD = 998244353; // const ll MOD = 1000000007; using mint = modint998244353; // using mint = modint1000000007; const double pi = 3.1415926536; const int MAX = 2000003; long long fac[MAX], finv[MAX], inv[MAX]; // テーブルを作る前処理 void COMinit() { fac[0] = fac[1] = 1; finv[0] = finv[1] = 1; inv[1] = 1; for (int i = 2; i < MAX; i++){ fac[i] = fac[i - 1] * i % MOD; inv[i] = MOD - inv[MOD%i] * (MOD / i) % MOD; finv[i] = finv[i - 1] * inv[i] % MOD; } } // 二項係数計算 long long COM(int n, int k){ if (n < k) return 0; if (n < 0 || k < 0) return 0; return fac[n] * (finv[k] * finv[n - k] % MOD) % MOD; } void comp(vector<ll>&a){ set<ll>s(a.begin(),a.end()); map<ll,ll>d; ll cnt=0; for(auto x:s)d[x]=cnt++; for(auto&x:a)x=d[x]; } ll gcd (ll x, ll y) { if (y == 0) return x; else if (y > x) { return gcd (y, x); } else return gcd(x % y, y); } ll lcm (ll x, ll y) { return x / gcd(x, y) * y; } ll my_sqrt(ll x) { ll m = 0; ll M = 1000000001; while (M - m > 1) { ll now = (M + m) / 2; if (now * now <= x) { m = now; } else { M = now; } } return m; } ll keta(ll n) { ll ret = 0; while (n) { n /= 10; ret++; } return ret; } ll ceil(ll n, ll m) { ll ret = n / m; if (n % m) ret++; return ret; } ll pow_ll(ll x, ll n) { if (n == 0) return 1; if (n % 2) { return pow_ll(x, n - 1) * x; } else { ll tmp = pow_ll(x, n / 2); return tmp * tmp; } } vector<int> e[200001]; int nyuuji[200001]; int main() { int n, m; cin >> n >> m; int u[m]; int v[m]; for (int i = 1; i <= n; i++) nyuuji[i] = 0; map<ll, ll> mp; for (int i = 0; i < m; i++) { cin >> u[i] >> v[i]; e[u[i]].push_back(v[i]); nyuuji[v[i]]++; mp[u[i]]++; mp[v[i]]++; } queue<int> que; for (int i = 1; i <= n; i++) { if (mp[i] == 0) continue; if (nyuuji[i] == 0) { que.push(i); } } vector<int> ans; while (que.size()) { int x = que.front(); que.pop(); ans.push_back(x); for (auto nex : e[x]) { if (mp[nex] == 0) continue; nyuuji[nex]--; if (nyuuji[nex] == 0) que.push(nex); } } if (ans.size() == mp.size()) { int k = ans.size(); cout << k - 1 << endl; for (int i = 0; i < k - 1; i++) { cout << ans[i] << ' ' << ans[i + 1] << endl; } } else { int k = ans.size(); cout << k << endl; for (int i = 0; i < k - 1; i++) { cout << ans[i] << ' ' << ans[i + 1] << endl; } cout << ans[k - 1] << ' ' << ans[0] << endl; } return 0; }