結果
問題 | No.2543 Many Meetings |
ユーザー | karinohito |
提出日時 | 2023-11-24 21:49:33 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,785 bytes |
コンパイル時間 | 5,187 ms |
コンパイル使用メモリ | 284,048 KB |
実行使用メモリ | 102,592 KB |
最終ジャッジ日時 | 2024-09-26 09:07:46 |
合計ジャッジ時間 | 16,175 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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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 | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 224 ms
31,488 KB |
testcase_04 | AC | 223 ms
31,360 KB |
testcase_05 | AC | 225 ms
31,488 KB |
testcase_06 | AC | 226 ms
31,488 KB |
testcase_07 | AC | 225 ms
31,360 KB |
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 | - |
testcase_28 | WA | - |
testcase_29 | WA | - |
testcase_30 | WA | - |
testcase_31 | AC | 50 ms
15,488 KB |
testcase_32 | AC | 211 ms
42,880 KB |
testcase_33 | AC | 2 ms
5,376 KB |
testcase_34 | AC | 2 ms
5,376 KB |
testcase_35 | AC | 2 ms
5,376 KB |
testcase_36 | WA | - |
testcase_37 | AC | 2 ms
5,376 KB |
testcase_38 | AC | 2 ms
5,376 KB |
testcase_39 | WA | - |
testcase_40 | AC | 3 ms
5,376 KB |
testcase_41 | AC | 2 ms
5,376 KB |
testcase_42 | AC | 3 ms
5,376 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #include <atcoder/all> #include <time.h> using namespace atcoder; using ll = long long; using vll = vector<ll>; using vvll = vector<vll>; using vvvll = vector<vvll>; using vb = vector<bool>; using vvb = vector<vb>; using vvvb = vector<vvb>; #define all(A) A.begin(),A.end() #define rep(i, n) for (ll i = 0; i < (ll) (n); i++) template<class T> bool chmax(T& p, T q, bool C = 1) { if (C == 0 && p == q) { return 1; } if (p < q) { p = q; return 1; } else { return 0; } } template<class T> bool chmin(T& p, T q, bool C = 1) { if (C == 0 && p == q) { return 1; } if (p > q) { p = q; return 1; } else { return 0; } } ll modPow(long long a, long long n, long long p) { if (n == 0) return 1; // 0乗にも対応する場合 if (n == 1) return a % p; if (n % 2 == 1) return (a * modPow(a, n - 1, p)) % p; long long t = modPow(a, n / 2, p); return (t * t) % p; } ll cnt = 0; ll gcd(ll(a), ll(b)) { cnt++; if (a == 0)return b; if (b == 0)return a; ll c = a; while (a % b != 0) { c = a % b; a = b; b = c; } return b; } ll sqrtz(ll N) { ll L = 0; ll R = sqrt(N) + 10000; while (abs(R - L) > 1) { ll mid = (R + L) / 2; if (mid * mid <= N)L = mid; else R = mid; } return L; } using mint = modint998244353; using vm = vector<mint>; using vvm = vector<vm>; using vvvm = vector<vvm>; vector<mint> fact, factinv, inv; const ll mod = 998244353; void prenCkModp(ll n) { fact.resize(n + 5); factinv.resize(n + 5); inv.resize(n + 5); fact[0] = fact[1] = 1; factinv[0] = factinv[1] = 1; inv[1] = 1; for (ll i = 2; i < n + 5; i++) { fact[i] = (fact[i - 1] * i); inv[i] = (mod - ((inv[mod % i] * (mod / i)))); factinv[i] = (factinv[i - 1] * inv[i]); } } mint nCk(ll n, ll k) { if (n < k || k < 0) return 0; return (fact[n] * ((factinv[k] * factinv[n - k]))); } bool DEB = 0; vvm mul(vvm A, vvm B) { ll n = A.size(); vvm res(n, vm(n, 0)); rep(i, n)rep(j, n)rep(k, n)res[i][j] += A[i][k] * B[k][j]; return res; } using pll = pair<ll, ll>; pair<ll, ll> op(pll a, pll b) { if (a.first < b.first)return a; else return b; }; pll e() { return { ll(1e18),-1 }; }; int main() { cin.tie(nullptr); ios::sync_with_stdio(false); ll N, K; cin >> N >> K; vector<pair<ll, ll>> P(N); rep(i, N)cin >> P[i].second >> P[i].first; sort(all(P)); ll R = -1e18; map<ll, ll> MP; ll an = 0; rep(i, N) { MP[P[i].first] = 1; MP[P[i].second] = 1; if (P[i].second >= R) { an++; chmax(R, P[i].first); } } ll k = 0; for (auto m : MP)MP[m.first] = k, k++; if (an < K) { cout << "-1" << endl; return 0; } segtree<pll, op, e> seg(k); rep(i, N)swap(P[i].first, P[i].second); sort(all(P)); vvll DB(N, vll(30, -1)); for (ll i = N - 1; i >= 0; i--) { ll d = MP[P[i].second]; pll res = seg.prod(d - 1, k); DB[i][0] = res.second; pll g = seg.get(d); seg.set(d, op(g, { P[i].second,i })); } rep(d, 29) { rep(n, N) { if (DB[n][d] < N && DB[n][d] >= 0) { DB[n][d + 1] = DB[DB[n][d]][d]; } } } an = 1e18; K--; rep(i, N) { ll x = i; rep(k, 30) { if (K & (1 << k)) { x = DB[x][k]; if (x < 0 || x >= N)break; } } if (x < 0 || x >= N)continue; chmin(an, P[x].second - P[i].first); } cout << an << endl; }