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답안 #219754

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
219754 2020-04-06T09:08:33 Z AlexPop28 별자리 3 (JOI20_constellation3) C++11
100 / 100
 375 ms 37864 KB 
#include <bits/stdc++.h>
#define dbg() cerr <<
#define name(x) (#x) << ": " << (x) << ' ' <<

using namespace std;

// sunt putin penal ca mergea aib
namespace SegmTree {
  int n;
  vector<int64_t> tree, lazy;

  void Init(int n_) {
    n = n_;
    tree.assign(4 * n, 0);
    lazy.assign(4 * n, 0);
  }

  void Push(int node) {
    if (lazy[node] == 0) return;
    for (int son : {2 * node + 1, 2 * node + 2}) {
      tree[son] += lazy[node];
      lazy[son] += lazy[node];
    }
    lazy[node] = 0;
  }

  void Add(int node, int left, int right, int x, int y, int64_t val) {
    if (x <= left && right <= y) {
      tree[node] += val;
      lazy[node] += val;
      return;
    }
    Push(node);
    int mid = left + (right - left) / 2;
    if (x <= mid)
      Add(2 * node + 1, left, mid, x, y, val);
    if (mid < y)
      Add(2 * node + 2, mid + 1, right, x, y, val);
  }

  int64_t Query(int node, int left, int right, int pos) {
    if (left == right) {
      return tree[node];
    }
    Push(node);
    int mid = left + (right - left) / 2;
    if (pos <= mid)
      return Query(2 * node + 1, left, mid, pos);
    else
      return Query(2 * node + 2, mid + 1, right, pos);
  }

  void Add(int left, int right, int64_t val) {
    Add(0, 0, n - 1, left, right, val);
  }

  int64_t Query(int pos) {
    return Query(0, 0, n - 1, pos);
  }
}

namespace DSU {
  int n;
  vector<int> dad, sz, lft, rgt;
  vector<int64_t> dp;

  void Init(int n_) {
    n = n_;
    dad.resize(n), sz.resize(n), lft.resize(n), rgt.resize(n), dp.resize(n);
    for (int i = 0; i < n; ++i) {
      lft[i] = rgt[i] = i;
      dad[i] = -1;
      sz[i] = 1;
      dp[i] = 0;
    }
  }

  int Find(int x) {
    if (dad[x] == -1) return x;
    return dad[x] = Find(dad[x]);
  }

  void Union(int x, int y) {
    x = Find(x), y = Find(y);
    if (x == y) return;
    if (sz[x] < sz[y]) swap(x, y);

    // dbg() "Union: " << name(x) name(y) endl;

    sz[x] += sz[y];
    dad[y] = x;

    SegmTree::Add(lft[x], rgt[x], dp[y]);
    SegmTree::Add(lft[y], rgt[y], dp[x]);

    dp[x] += dp[y];
    lft[x] = min(lft[x], lft[y]);
    rgt[x] = max(rgt[x], rgt[y]);
  }

  void Update(int x, int64_t val) {
    // dbg() "DSU Upd: " << name(x) name(val) endl;
    x = Find(x);
    dp[x] = max(dp[x], val);
  }

  int64_t Get(int node) {
    return dp[Find(node)];
  }
}

int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);

  int n; cin >> n;
  vector<int> h(n);
  vector<vector<int>> walls(n + 1);
  for (int i = 0; i < n; ++i) {
    cin >> h[i];
    walls[h[i]].emplace_back(i);
  }
  int m; cin >> m;
  vector<vector<pair<int, int>>> stars(n + 1);
  int64_t ans = 0;
  for (int i = 0; i < m; ++i) {
    int x, y, c; cin >> x >> y >> c; --x, --y;
    stars[y].emplace_back(x, c);
    ans += c;
  }

  // le sterg pe toate si incerc sa pastrez o suma cat mai mare

  DSU::Init(n);
  SegmTree::Init(n);
  for (int y = 0; y <= n; ++y) {
    for (int &x : walls[y]) {
      if (x - 1 >= 0 && h[x - 1] <= y) {
        DSU::Union(x - 1, x);
      }
      if (x + 1  < n && h[x + 1] <= y) {
        DSU::Union(x, x + 1);
      }
    }

    // for (int i = 0; i < n; ++i) {
      // dbg() name(i) name(DSU::Get(i)) endl;
    // }


    for (auto &star : stars[y]) {
      int x, c; tie(x, c) = star;
      DSU::Update(x, c + SegmTree::Query(x));
    }
  }

  for (int i = 1; i < n; ++i) {
    DSU::Union(i - 1, i);
  }

  cout << ans - DSU::Get(0) << endl;
}

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct

Subtask #2
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 7 ms 640 KB Output is correct
24 Correct 7 ms 768 KB Output is correct
25 Correct 7 ms 768 KB Output is correct
26 Correct 8 ms 768 KB Output is correct
27 Correct 7 ms 768 KB Output is correct
28 Correct 7 ms 768 KB Output is correct
29 Correct 7 ms 768 KB Output is correct
30 Correct 7 ms 768 KB Output is correct
31 Correct 7 ms 768 KB Output is correct
32 Correct 7 ms 768 KB Output is correct
33 Correct 8 ms 768 KB Output is correct
34 Correct 7 ms 768 KB Output is correct
35 Correct 7 ms 768 KB Output is correct
36 Correct 6 ms 640 KB Output is correct
37 Correct 8 ms 660 KB Output is correct
38 Correct 6 ms 768 KB Output is correct
39 Correct 6 ms 640 KB Output is correct
40 Correct 7 ms 640 KB Output is correct
41 Correct 6 ms 640 KB Output is correct
42 Correct 6 ms 768 KB Output is correct
43 Correct 6 ms 640 KB Output is correct
44 Correct 6 ms 640 KB Output is correct

Subtask #3
65.0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 7 ms 640 KB Output is correct
24 Correct 7 ms 768 KB Output is correct
25 Correct 7 ms 768 KB Output is correct
26 Correct 8 ms 768 KB Output is correct
27 Correct 7 ms 768 KB Output is correct
28 Correct 7 ms 768 KB Output is correct
29 Correct 7 ms 768 KB Output is correct
30 Correct 7 ms 768 KB Output is correct
31 Correct 7 ms 768 KB Output is correct
32 Correct 7 ms 768 KB Output is correct
33 Correct 8 ms 768 KB Output is correct
34 Correct 7 ms 768 KB Output is correct
35 Correct 7 ms 768 KB Output is correct
36 Correct 6 ms 640 KB Output is correct
37 Correct 8 ms 660 KB Output is correct
38 Correct 6 ms 768 KB Output is correct
39 Correct 6 ms 640 KB Output is correct
40 Correct 7 ms 640 KB Output is correct
41 Correct 6 ms 640 KB Output is correct
42 Correct 6 ms 768 KB Output is correct
43 Correct 6 ms 640 KB Output is correct
44 Correct 6 ms 640 KB Output is correct
45 Correct 375 ms 35448 KB Output is correct
46 Correct 375 ms 35192 KB Output is correct
47 Correct 354 ms 34552 KB Output is correct
48 Correct 371 ms 35576 KB Output is correct
49 Correct 355 ms 34296 KB Output is correct
50 Correct 354 ms 34296 KB Output is correct
51 Correct 350 ms 34424 KB Output is correct
52 Correct 356 ms 35064 KB Output is correct
53 Correct 358 ms 35064 KB Output is correct
54 Correct 298 ms 37864 KB Output is correct
55 Correct 298 ms 37064 KB Output is correct
56 Correct 280 ms 36600 KB Output is correct
57 Correct 289 ms 36472 KB Output is correct
58 Correct 258 ms 31480 KB Output is correct
59 Correct 263 ms 31352 KB Output is correct
60 Correct 213 ms 37752 KB Output is correct
61 Correct 235 ms 31096 KB Output is correct
62 Correct 283 ms 34168 KB Output is correct
63 Correct 237 ms 30720 KB Output is correct
64 Correct 238 ms 30200 KB Output is correct
65 Correct 281 ms 34552 KB Output is correct
66 Correct 238 ms 29936 KB Output is correct