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답안 #1038641

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1038641 2024-07-30T04:37:52 Z phong 3단 점프 (JOI19_jumps) C++17
100 / 100
 424 ms 88948 KB 
#include <bits/stdc++.h>

using namespace std;

typedef array<int, 3> Node; // 0/1/2: c/ab/abc

const int maxn = 1 << 19;
const int INF = 1e9;

int n, q;
int A[maxn];
vector<int> p[maxn];
vector<pair<int, int>> query[maxn];

struct segtree {
  Node T[maxn << 1];

  Node upd(const Node&x, const Node& y) {
    return {max(x[0], y[0]), max(x[1], y[1]), max({x[1] + y[0], x[2], y[2]})};
  }

  void init() {
    for (int i = maxn; i < maxn << 1; ++i) T[i] = {A[i - maxn], -INF, -INF};
    for (int i = maxn - 1; i > 0; --i) T[i] = upd(T[2 * i], T[2 * i + 1]);
  }

  void update(int i, int v) {
    i += maxn;
    T[i][1] = max(T[i][1], v);
    T[i][2] = max(T[i][2], T[i][1]  + T[i][0]);
    for (i >>= 1; i > 0; i >>= 1) {
      T[i] = upd(T[2 * i], T[2 * i + 1]);
    }
  }

  int get(int l, int r) {
    Node L = {-INF, -INF, -INF};
    Node R = L;
    for (l += maxn, r += maxn; l < r; l >>= 1, r >>= 1) {
      if (l & 1) {
        L = upd(L, T[l]);
        l++;
      }
      if (r & 1) {
        r--;
        R = upd(T[r], R);
      }
    }
    return upd(L, R)[2];
  }
} seg;
#define task "code"

int main() {
  ios_base::sync_with_stdio(0); cin.tie(NULL);
//  freopen(task".inp", "r", stdin);
//    freopen(task".ans", "w", stdout);
  cin >> n;

  stack<int> st;
  for (int i = 0; i < n; ++i) {
    cin >> A[i];

    while (!st.empty()) {
      int j = st.top(), k = 2 * i - j;
      if (k < n) p[j].push_back(k);
      if (A[j] <= A[i]) st.pop();
      else break;
    }
    st.push(i);
  }
  seg.init();

  cin >> q;
  vector<int> answer(q, 0);
  for (int i = 0; i < q; ++i) {
    int l, r; cin >> l >> r;
    query[l - 1].emplace_back(r - 1, i);
  }

  for (int i = n - 1; i >= 0; --i) {
    for (int j : p[i]) {
      seg.update(j, A[i] + A[(i + j) / 2]);    }
    for (auto it : query[i]) {
      answer[it.second] = seg.get(i, it.first + 1);
    }
  }
  for (int i = 0; i < q; ++i) cout << answer[i] << "\n";
  return 0;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 37208 KB Output is correct
2 Correct 12 ms 37212 KB Output is correct
3 Correct 13 ms 37212 KB Output is correct
4 Correct 13 ms 37340 KB Output is correct
5 Correct 13 ms 37388 KB Output is correct
6 Correct 12 ms 37164 KB Output is correct
7 Correct 12 ms 37364 KB Output is correct
8 Correct 12 ms 37208 KB Output is correct
9 Correct 12 ms 37212 KB Output is correct
10 Correct 12 ms 37212 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 37208 KB Output is correct
2 Correct 12 ms 37212 KB Output is correct
3 Correct 13 ms 37212 KB Output is correct
4 Correct 13 ms 37340 KB Output is correct
5 Correct 13 ms 37388 KB Output is correct
6 Correct 12 ms 37164 KB Output is correct
7 Correct 12 ms 37364 KB Output is correct
8 Correct 12 ms 37208 KB Output is correct
9 Correct 12 ms 37212 KB Output is correct
10 Correct 12 ms 37212 KB Output is correct
11 Correct 125 ms 56020 KB Output is correct
12 Correct 124 ms 56148 KB Output is correct
13 Correct 119 ms 56144 KB Output is correct
14 Correct 126 ms 56144 KB Output is correct
15 Correct 125 ms 56184 KB Output is correct
16 Correct 123 ms 55380 KB Output is correct
17 Correct 148 ms 55316 KB Output is correct
18 Correct 134 ms 55376 KB Output is correct
19 Correct 132 ms 56044 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 75 ms 46416 KB Output is correct
2 Correct 49 ms 45964 KB Output is correct
3 Correct 49 ms 46932 KB Output is correct
4 Correct 74 ms 46344 KB Output is correct
5 Correct 79 ms 46164 KB Output is correct
6 Correct 70 ms 45648 KB Output is correct
7 Correct 72 ms 45520 KB Output is correct
8 Correct 69 ms 45404 KB Output is correct
9 Correct 70 ms 45904 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 37208 KB Output is correct
2 Correct 12 ms 37212 KB Output is correct
3 Correct 13 ms 37212 KB Output is correct
4 Correct 13 ms 37340 KB Output is correct
5 Correct 13 ms 37388 KB Output is correct
6 Correct 12 ms 37164 KB Output is correct
7 Correct 12 ms 37364 KB Output is correct
8 Correct 12 ms 37208 KB Output is correct
9 Correct 12 ms 37212 KB Output is correct
10 Correct 12 ms 37212 KB Output is correct
11 Correct 125 ms 56020 KB Output is correct
12 Correct 124 ms 56148 KB Output is correct
13 Correct 119 ms 56144 KB Output is correct
14 Correct 126 ms 56144 KB Output is correct
15 Correct 125 ms 56184 KB Output is correct
16 Correct 123 ms 55380 KB Output is correct
17 Correct 148 ms 55316 KB Output is correct
18 Correct 134 ms 55376 KB Output is correct
19 Correct 132 ms 56044 KB Output is correct
20 Correct 75 ms 46416 KB Output is correct
21 Correct 49 ms 45964 KB Output is correct
22 Correct 49 ms 46932 KB Output is correct
23 Correct 74 ms 46344 KB Output is correct
24 Correct 79 ms 46164 KB Output is correct
25 Correct 70 ms 45648 KB Output is correct
26 Correct 72 ms 45520 KB Output is correct
27 Correct 69 ms 45404 KB Output is correct
28 Correct 70 ms 45904 KB Output is correct
29 Correct 424 ms 83396 KB Output is correct
30 Correct 316 ms 82724 KB Output is correct
31 Correct 327 ms 84820 KB Output is correct
32 Correct 424 ms 83308 KB Output is correct
33 Correct 381 ms 83280 KB Output is correct
34 Correct 378 ms 80980 KB Output is correct
35 Correct 388 ms 80736 KB Output is correct
36 Correct 384 ms 80724 KB Output is correct
37 Correct 373 ms 82092 KB Output is correct
38 Correct 285 ms 88948 KB Output is correct
39 Correct 262 ms 88920 KB Output is correct
40 Correct 267 ms 85764 KB Output is correct
41 Correct 277 ms 85216 KB Output is correct
42 Correct 290 ms 85264 KB Output is correct
43 Correct 269 ms 86912 KB Output is correct
44 Correct 322 ms 88552 KB Output is correct
45 Correct 298 ms 88656 KB Output is correct
46 Correct 298 ms 85332 KB Output is correct
47 Correct 285 ms 84772 KB Output is correct
48 Correct 275 ms 84900 KB Output is correct
49 Correct 274 ms 86868 KB Output is correct
50 Correct 318 ms 86612 KB Output is correct
51 Correct 311 ms 86460 KB Output is correct
52 Correct 317 ms 83984 KB Output is correct
53 Correct 312 ms 83748 KB Output is correct
54 Correct 320 ms 83796 KB Output is correct
55 Correct 342 ms 85412 KB Output is correct