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답안 #441511

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
441511 2021-07-05T09:41:08 Z peijar 3단 점프 (JOI19_jumps) C++17
100 / 100
 1756 ms 125080 KB 
#include <bits/stdc++.h>
#define int long long
using namespace std;

const int MAXN = (1 << 20) + 1;
const int INF = -1e18;
int iDeb[MAXN], iFin[MAXN], lazyMax[MAXN], maxVal[MAXN], strengh[MAXN],
    maxStrength[MAXN];

void buildTree(int iNoeud, int deb, int fin) {
  iDeb[iNoeud] = deb, iFin[iNoeud] = fin;
  lazyMax[iNoeud] = INF;

  if (deb == fin) {
    maxStrength[iNoeud] = strengh[deb];
    maxVal[iNoeud] = INF;
    return;
  }
  buildTree(2 * iNoeud, deb, (deb + fin) / 2);
  buildTree(2 * iNoeud + 1, (deb + fin) / 2 + 1, fin);
  maxVal[iNoeud] = INF;
  maxStrength[iNoeud] =
      max(maxStrength[2 * iNoeud], maxStrength[2 * iNoeud + 1]);
}

void push(int iNoeud) {
  if (lazyMax[iNoeud] == INF)
    return;

  maxVal[iNoeud] = max(maxVal[iNoeud], maxStrength[iNoeud] + lazyMax[iNoeud]);
  if (iDeb[iNoeud] < iFin[iNoeud]) {
    lazyMax[iNoeud * 2] = max(lazyMax[2 * iNoeud], lazyMax[iNoeud]);
    lazyMax[1 + iNoeud * 2] = max(lazyMax[2 * iNoeud], lazyMax[iNoeud]);
  }
  lazyMax[iNoeud] = INF;
}

void upd(int iNoeud, int deb, int fin, int v) {
  push(iNoeud);
  if (deb > iFin[iNoeud] or fin < iDeb[iNoeud])
    return;
  if (iDeb[iNoeud] >= deb and iFin[iNoeud] <= fin) {
    lazyMax[iNoeud] = v;
    push(iNoeud);
    return;
  }
  upd(2 * iNoeud, deb, fin, v);
  upd(1 + 2 * iNoeud, deb, fin, v);
  maxVal[iNoeud] = max(maxVal[2 * iNoeud], maxVal[2 * iNoeud + 1]);
}

int query(int iNoeud, int deb, int fin) {
  push(iNoeud);
  if (deb > iFin[iNoeud] or fin < iDeb[iNoeud])
    return INF;
  if (iDeb[iNoeud] >= deb and iFin[iNoeud] <= fin)
    return maxVal[iNoeud];
  return max(query(2 * iNoeud, deb, fin), query(2 * iNoeud + 1, deb, fin));
}

signed main(void) {
  ios_base::sync_with_stdio(false);
  cin.tie(0);

  int N;
  cin >> N;
  for (int i = 0; i < N; ++i)
    cin >> strengh[i];

  vector<vector<int>> interessants(N);
  vector<pair<int, int>> curRecords;
  for (int b = 1; b < N; ++b) {
    while (!curRecords.empty() and curRecords.back().first <= strengh[b - 1])
      curRecords.pop_back();
    curRecords.emplace_back(strengh[b - 1], b - 1);
    for (int i = (int)curRecords.size() - 1; i >= 0; --i) {
      auto [val, pos] = curRecords[i];
      if (b - pos + b < N)
        interessants[pos].push_back(b);
      if (val >= strengh[b])
        break;
    }
  }

  int Q;
  cin >> Q;
  vector<vector<pair<int, int>>> queries(N);
  vector<int> ret(Q);
  for (int i = 0; i < Q; ++i) {
    int l, r;
    cin >> l >> r;
    --l, --r;
    queries[l].emplace_back(r, i);
  }
  buildTree(1, 0, N - 1);
  for (int a = N - 1; a >= 0; --a) {
    for (int b : interessants[a]) {
      if (b + b - a < N)
        upd(1, 2 * b - a, N - 1, strengh[a] + strengh[b]);
    }
    for (auto [r, id] : queries[a])
      ret[id] = query(1, a + 2, r);
  }

  for (auto v : ret)
    cout << v << '\n';
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 320 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 320 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 320 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 320 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 405 ms 28216 KB Output is correct
12 Correct 398 ms 28356 KB Output is correct
13 Correct 412 ms 28488 KB Output is correct
14 Correct 406 ms 28356 KB Output is correct
15 Correct 407 ms 28532 KB Output is correct
16 Correct 407 ms 27980 KB Output is correct
17 Correct 404 ms 27836 KB Output is correct
18 Correct 388 ms 27844 KB Output is correct
19 Correct 400 ms 28384 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 226 ms 39676 KB Output is correct
2 Correct 129 ms 38340 KB Output is correct
3 Correct 139 ms 41384 KB Output is correct
4 Correct 234 ms 39524 KB Output is correct
5 Correct 234 ms 39572 KB Output is correct
6 Correct 221 ms 39440 KB Output is correct
7 Correct 224 ms 39492 KB Output is correct
8 Correct 225 ms 39616 KB Output is correct
9 Correct 223 ms 39536 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 320 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 320 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 405 ms 28216 KB Output is correct
12 Correct 398 ms 28356 KB Output is correct
13 Correct 412 ms 28488 KB Output is correct
14 Correct 406 ms 28356 KB Output is correct
15 Correct 407 ms 28532 KB Output is correct
16 Correct 407 ms 27980 KB Output is correct
17 Correct 404 ms 27836 KB Output is correct
18 Correct 388 ms 27844 KB Output is correct
19 Correct 400 ms 28384 KB Output is correct
20 Correct 226 ms 39676 KB Output is correct
21 Correct 129 ms 38340 KB Output is correct
22 Correct 139 ms 41384 KB Output is correct
23 Correct 234 ms 39524 KB Output is correct
24 Correct 234 ms 39572 KB Output is correct
25 Correct 221 ms 39440 KB Output is correct
26 Correct 224 ms 39492 KB Output is correct
27 Correct 225 ms 39616 KB Output is correct
28 Correct 223 ms 39536 KB Output is correct
29 Correct 1711 ms 120448 KB Output is correct
30 Correct 1463 ms 117288 KB Output is correct
31 Correct 1432 ms 125080 KB Output is correct
32 Correct 1702 ms 120432 KB Output is correct
33 Correct 1650 ms 120384 KB Output is correct
34 Correct 1665 ms 118168 KB Output is correct
35 Correct 1669 ms 117828 KB Output is correct
36 Correct 1643 ms 117764 KB Output is correct
37 Correct 1756 ms 119248 KB Output is correct
38 Correct 1064 ms 123008 KB Output is correct
39 Correct 1063 ms 123076 KB Output is correct
40 Correct 1060 ms 119728 KB Output is correct
41 Correct 1055 ms 119208 KB Output is correct
42 Correct 1051 ms 119204 KB Output is correct
43 Correct 1041 ms 121124 KB Output is correct
44 Correct 1162 ms 123460 KB Output is correct
45 Correct 1151 ms 123440 KB Output is correct
46 Correct 1137 ms 120124 KB Output is correct
47 Correct 1170 ms 119656 KB Output is correct
48 Correct 1145 ms 119740 KB Output is correct
49 Correct 1137 ms 121940 KB Output is correct
50 Correct 1282 ms 123588 KB Output is correct
51 Correct 1291 ms 123584 KB Output is correct
52 Correct 1265 ms 121024 KB Output is correct
53 Correct 1265 ms 120820 KB Output is correct
54 Correct 1252 ms 120772 KB Output is correct
55 Correct 1260 ms 122432 KB Output is correct