oj.uz

답안 #909879

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
909879 2024-01-17T14:13:53 Z nima_aryan 3단 점프 (JOI19_jumps) C++17
100 / 100
 930 ms 52864 KB 
/**
 *    author:  NimaAryan
 *    created: 2024-01-16 23:23:10  
**/
#include <bits/stdc++.h>

using namespace std;

#ifdef LOCAL
#include "algo/debug.h"
#endif

using i64 = long long;

struct Tag {
  int add = 0;

  void apply(const Tag& t) {
    add = max(add, t.add);
  }
};
struct Info {
  int val = 0;
  int best = 0;

  void apply(const Tag& t) {
    best = max(best, val + t.add);
  }
};
Info operator+(const Info& a, const Info& b) {
  return {max(a.val, b.val), max(a.best, b.best)};
}

struct LazySegmentTree {
  int n;
  vector<Info> info;
  vector<Tag> tag;

  LazySegmentTree(int n) : n(n) {
    info.assign(4 << __lg(n), Info());
    tag.assign(4 << __lg(n), Tag());
  }

  void pull(int p) {
    info[p] = info[2 * p] + info[2 * p + 1];
  }
  void apply(int p, const Tag& v) {
    info[p].apply(v);
    tag[p].apply(v);
  }
  void push(int p) {
    apply(2 * p, tag[p]);
    apply(2 * p + 1, tag[p]);
  }

  void modify(int p, int l, int r, int x, const Info& v) {
    if (r - l == 1) {
      info[p] = v;
      return;
    }
    push(p);
    int m = (l + r) / 2;
    if (x < m) {
      modify(2 * p, l, m, x, v);
    } else {
      modify(2 * p + 1, m, r, x, v);
    }
    pull(p);
  }
  void modify(int x, const Info& v) {
    modify(1, 0, n, x, v);
  }

  void range_apply(int p, int l, int r, int lx, int rx, const Tag& v) {
    if (l >= rx || r <= lx) {
      return;
    }
    if (l >= lx && r <= rx) {
      apply(p, v);
      return;
    }
    push(p);
    int m = (l + r) / 2;
    range_apply(2 * p, l, m, lx, rx, v);
    range_apply(2 * p + 1, m, r, lx, rx, v);
    pull(p);
  }
  void range_apply(int lx, int rx, const Tag& v) {
    range_apply(1, 0, n, lx, rx, v);
  }

  Info range_query(int p, int l, int r, int lx, int rx) {
    if (l >= rx || r <= lx) {
      return Info();
    }
    if (l >= lx && r <= rx) {
      return info[p];
    }
    push(p);
    int m = (l + r) / 2;
    return range_query(2 * p, l, m, lx, rx) +
           range_query(2 * p + 1, m, r, lx, rx);
  }
  Info range_query(int lx, int rx) {
    return range_query(1, 0, n, lx, rx);
  }
};

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  
  int n;
  cin >> n;

  vector<int> a(n);
  for (int i = 0; i < n; ++i) {
    cin >> a[i];
  }

  int q;
  cin >> q;

  vector<int> l(q), r(q);
  vector<vector<int>> qs(n);
  for (int i = 0; i < q; ++i) {
    cin >> l[i] >> r[i];
    --l[i];
    qs[l[i]].push_back(i);
  }

  vector<int> ans(q);
  LazySegmentTree seg(n);
  for (int i = 0; i < n; ++i) {
    seg.modify(i, {a[i], 0});
  }
  vector<int> stk;
  for (int i = n - 1; i >= 0; --i) {
    while (!stk.empty()) {
      int j = stk.back();
      stk.pop_back();
      seg.range_apply(j + (j - i), n, Tag{a[i] + a[j]});
      if (a[j] > a[i]) {
        stk.push_back(j);
        break;
      }
    }
    stk.push_back(i);
    for (int p : qs[i]) {
      ans[p] = seg.range_query(i, r[p]).best;
    }
  }

  for (int i = 0; i < q; ++i) {
    cout << ans[i] << "\n";
  }

  return 0;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 212 ms 15040 KB Output is correct
12 Correct 217 ms 15188 KB Output is correct
13 Correct 209 ms 14928 KB Output is correct
14 Correct 203 ms 15184 KB Output is correct
15 Correct 233 ms 15092 KB Output is correct
16 Correct 207 ms 14416 KB Output is correct
17 Correct 217 ms 14300 KB Output is correct
18 Correct 207 ms 14448 KB Output is correct
19 Correct 223 ms 14928 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 158 ms 11868 KB Output is correct
2 Correct 96 ms 13096 KB Output is correct
3 Correct 98 ms 12116 KB Output is correct
4 Correct 146 ms 12088 KB Output is correct
5 Correct 138 ms 11952 KB Output is correct
6 Correct 134 ms 11864 KB Output is correct
7 Correct 163 ms 12092 KB Output is correct
8 Correct 138 ms 12088 KB Output is correct
9 Correct 136 ms 12088 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 212 ms 15040 KB Output is correct
12 Correct 217 ms 15188 KB Output is correct
13 Correct 209 ms 14928 KB Output is correct
14 Correct 203 ms 15184 KB Output is correct
15 Correct 233 ms 15092 KB Output is correct
16 Correct 207 ms 14416 KB Output is correct
17 Correct 217 ms 14300 KB Output is correct
18 Correct 207 ms 14448 KB Output is correct
19 Correct 223 ms 14928 KB Output is correct
20 Correct 158 ms 11868 KB Output is correct
21 Correct 96 ms 13096 KB Output is correct
22 Correct 98 ms 12116 KB Output is correct
23 Correct 146 ms 12088 KB Output is correct
24 Correct 138 ms 11952 KB Output is correct
25 Correct 134 ms 11864 KB Output is correct
26 Correct 163 ms 12092 KB Output is correct
27 Correct 138 ms 12088 KB Output is correct
28 Correct 136 ms 12088 KB Output is correct
29 Correct 877 ms 46164 KB Output is correct
30 Correct 810 ms 48152 KB Output is correct
31 Correct 778 ms 46440 KB Output is correct
32 Correct 848 ms 46180 KB Output is correct
33 Correct 887 ms 46308 KB Output is correct
34 Correct 878 ms 45676 KB Output is correct
35 Correct 839 ms 45512 KB Output is correct
36 Correct 930 ms 45424 KB Output is correct
37 Correct 901 ms 46188 KB Output is correct
38 Correct 609 ms 52800 KB Output is correct
39 Correct 609 ms 52864 KB Output is correct
40 Correct 630 ms 51260 KB Output is correct
41 Correct 597 ms 51024 KB Output is correct
42 Correct 606 ms 51012 KB Output is correct
43 Correct 609 ms 51940 KB Output is correct
44 Correct 637 ms 52132 KB Output is correct
45 Correct 640 ms 52156 KB Output is correct
46 Correct 630 ms 50648 KB Output is correct
47 Correct 644 ms 50712 KB Output is correct
48 Correct 655 ms 50764 KB Output is correct
49 Correct 643 ms 51712 KB Output is correct
50 Correct 727 ms 49856 KB Output is correct
51 Correct 763 ms 49868 KB Output is correct
52 Correct 729 ms 49084 KB Output is correct
53 Correct 723 ms 49232 KB Output is correct
54 Correct 753 ms 49008 KB Output is correct
55 Correct 781 ms 49860 KB Output is correct