oj.uz

답안 #728218

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
728218 2023-04-22T04:49:55 Z jampm 운세 보기 2 (JOI14_fortune_telling2) C++17
4 / 100
 3000 ms 2516 KB 
#include <bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
using ll = long long int;
#define all(a) a.begin(), a.end()
const int Mxn = 6e5 + 2;

struct segtree_sum {
  vector<int> segs;
  segtree_sum() {segs.assign(Mxn<<1, 0);}
  void upd(int i, int x) {
    i += Mxn; segs[i] += x;
    for (i >>= 1; i; i >>= 1) {
      segs[i] = segs[i<<1] + segs[i<<1|1];
    }
  }
  int query(int l, int r, int ans = 0) {
    for (l += Mxn, r += Mxn + 1; l < r; l >>= 1, r >>= 1) {
      if (l&1) ans += segs[l++];
      if (r&1) ans += segs[--r];
    }
    return ans;
  }
};

struct segtree_max {
  vector<int> segs;
  segtree_max() {segs.assign(Mxn<<1, -1);}
  void upd(int i, int x) {
    i += Mxn; segs[i] = x;
    for (i >>= 1; i; i >>= 1) {
      segs[i] = max(segs[i<<1], segs[i<<1|1]);
    }
  }
  int query(int l, int r, int ans = -1) {
    for (l += Mxn, r += Mxn + 1; l < r; l >>= 1, r >>= 1) {
      if (l&1) ans = max(segs[l++], ans);
      if (r&1) ans = max(segs[--r], ans);
    }
    return ans;
  }
};

struct query {
  int idx, sufix, val;
  bool operator<(const query & X) {return sufix > X.sufix;}
};

//stress test brute force
ll brute_force(ll n, ll k, vector<pii> A, vector<int> B, ll ans = 0, ll idx = 0) {
  ll card[2][n], oper[k];
  for (int i = 0; i < n; i++) card[0][i] = A[i].first, card[1][i] = A[i].second;
  for (int i = 0; i < k; i++) oper[i] = B[i];
  for (int i = 0; i < n; i++, idx = 0) {
    for (int j = 0; j < k; j++) {
      idx ^= (card[idx][i] <= oper[j]);
    }
    ans += card[idx][i];
  }
  return ans;
}

int main() {
  ios_base::sync_with_stdio(0); cin.tie(0);
  int n, k, cnt = 0; cin >> n >> k; 
  ll ans = 0;
  map<int, int> cc;
  map<ll, ll> anti;
  vector<pii> A(n);
  for (auto &[x, y] : A) cin >> x >> y;
  vector<int> T(k);
  for (auto &e : T) cin >> e;
  if (k < 40000 && n < 40000) {
    cout << brute_force(n, k, A, T) << '\n';
    return 0;
  }
  for (auto [x, y] : A) cc[x], cc[y];
  for (auto e : T) cc[e];
  for (auto &[x, y] : cc) y = cnt++;
  for (auto &[x, y] : A) x = cc[x], y = cc[y];
  for (auto &e : T) e = cc[e];
  for (auto [x, y] : cc) anti[y] = x;

  segtree_max St_max;
  vector<query> Count(n);
  for (int i = 0; i < k; i++) {
    St_max.upd(T[i], i);
  }
  for (int i = 0; i < n; i++) {
    auto &[idx, sufix, val] = Count[i];
    idx = i;
    auto [l, r] = A[i];
    if (l > r) {
      sufix = St_max.query(r, l - 1);
      val = l;
    } else {
      sufix = St_max.query(l, r - 1);
      val = r;
    }
  }
  sort(all(Count));
  segtree_sum St_sum; vector<int> Ans(n);
  for (int i = k - 1; i >= 0; i--) {
    while (Count[cnt].sufix == i) {
      auto &[idx, sufix, val] = Count[cnt++];
      Ans[idx] = St_sum.query(val, Mxn - 1);
    }
    St_sum.upd(T[i], 1);
  }
  for (int i = 0; i < n; i++) {
    auto [l, r] = A[i];
    if (l > r) {
      swap(l, r);
      if (St_max.query(l, r - 1) == -1) {
        if (St_sum.query(r, Mxn - 1)%2 == 1) ans += anti[l];
        else ans += anti[r];
      } else {
        if (Ans[i]%2 == 1) ans += anti[l];
        else ans += anti[r];
      }
    } else {
      if (St_max.query(l, r - 1) == -1) {
        if (St_sum.query(r, Mxn - 1)%2 == 1) ans += anti[r];
        else ans += anti[l];
      } else {
        if (Ans[i]%2 == 1) ans += anti[l];
        else ans += anti[r];
      }
    }
  }
  cout << ans << '\n';
}

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 4 ms 340 KB Output is correct
3 Correct 6 ms 340 KB Output is correct
4 Correct 6 ms 396 KB Output is correct
5 Correct 6 ms 396 KB Output is correct
6 Correct 6 ms 336 KB Output is correct
7 Correct 5 ms 340 KB Output is correct
8 Correct 5 ms 332 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 340 KB Output is correct
11 Correct 6 ms 364 KB Output is correct
12 Correct 5 ms 356 KB Output is correct
13 Correct 5 ms 340 KB Output is correct

Subtask #2
0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 4 ms 340 KB Output is correct
3 Correct 6 ms 340 KB Output is correct
4 Correct 6 ms 396 KB Output is correct
5 Correct 6 ms 396 KB Output is correct
6 Correct 6 ms 336 KB Output is correct
7 Correct 5 ms 340 KB Output is correct
8 Correct 5 ms 332 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 340 KB Output is correct
11 Correct 6 ms 364 KB Output is correct
12 Correct 5 ms 356 KB Output is correct
13 Correct 5 ms 340 KB Output is correct
14 Correct 456 ms 1060 KB Output is correct
15 Correct 1736 ms 1840 KB Output is correct
16 Execution timed out 3067 ms 2516 KB Time limit exceeded
17 Halted 0 ms 0 KB -

Subtask #3
0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 4 ms 340 KB Output is correct
3 Correct 6 ms 340 KB Output is correct
4 Correct 6 ms 396 KB Output is correct
5 Correct 6 ms 396 KB Output is correct
6 Correct 6 ms 336 KB Output is correct
7 Correct 5 ms 340 KB Output is correct
8 Correct 5 ms 332 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 340 KB Output is correct
11 Correct 6 ms 364 KB Output is correct
12 Correct 5 ms 356 KB Output is correct
13 Correct 5 ms 340 KB Output is correct
14 Correct 456 ms 1060 KB Output is correct
15 Correct 1736 ms 1840 KB Output is correct
16 Execution timed out 3067 ms 2516 KB Time limit exceeded
17 Halted 0 ms 0 KB -