oj.uz

답안 #218136

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
218136 2020-04-01T10:09:42 Z fedoseevtimofey 별자리 3 (JOI20_constellation3) C++14
100 / 100
 903 ms 77948 KB 
#include <iostream>
#include <string>
#include <vector>
#include <queue>
#include <deque>
#include <stack>
#include <set>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <cstring>
#include <cmath>
#include <cstdlib>
#include <algorithm>
#include <random>
#include <iomanip>
#include <functional>
#include <cassert>

using namespace std;

typedef long long ll;

const int N = 2e5 + 7;

int p[N];
int l[N], r[N];
int el[N], er[N];

int get(int a) {
  return (a == p[a] ? a : p[a] = get(p[a]));
}

void join(int a, int b) {
  a = get(a);
  b = get(b);
  p[a] = b;
  l[b] = min(l[b], l[a]);
  r[b] = max(r[b], r[a]);
}

int vert_l[N], vert_r[N];
vector <int> gs[N];
vector <int> g[N];
ll cost[N];

struct Fenwick {
  vector <ll> f;
  int n;
  Fenwick(int _n) {
    n = _n;
    f.resize(n);
  }
  void modify(int i, ll val) {
    for (; i < n; i |= i + 1) {
      f[i] += val;
    }
  }
  void update(int l, int r, ll val) {
    modify(l, val);
    if (r + 1 < n) modify(r + 1, -val);
  }
  ll get(int r) {
    ll res = 0;
    for (; r >= 0; r &= r + 1, --r) {
      res += f[r];
    }
    return res;
  }
};

int main() {
  ios_base::sync_with_stdio(false); cin.tie(0);
#ifdef LOCAL
  freopen("input.txt", "r", stdin);
#endif
  int n;
  cin >> n;
  vector <int> a(n);
  vector <vector <int>> nc(n);
  for (int i = 0; i < n; ++i) {
    cin >> a[i];
    a[i] = n - a[i] - 1;
    if (a[i] != -1) {
      nc[a[i]].push_back(i);
    }
  }
  int m;
  cin >> m;
  vector <int> x(m), y(m);
  vector <vector <pair <int, int>>> who(n);
  vector <int> c(m);
  for (int i = 0; i < m; ++i) {
    cin >> y[i] >> x[i] >> c[i];
    --y[i];
    x[i] = n - x[i];
    who[x[i]].push_back({y[i], i});
  }            
  set <pair <int, int>> seg;
  map <pair <int, int>, int> num;
  int uk = 1;
  vector <int> have(n);
  for (int i = n - 1; i >= 0; --i) {
    for (auto j : nc[i]) {
      p[j] = j;
      l[j] = j;
      r[j] = j;
      have[j] = 1;
      if (j > 0 && have[j - 1]) {
        join(j, j - 1);
      }
      if (j + 1 < n && have[j + 1]) {
        join(j, j + 1);
      }
    }
    set <pair <int, int>> cur;
    for (auto pr : who[i]) {
      int id = pr.second;
      int yc = pr.first;
      int cl = l[get(yc)];
      int cr = r[get(yc)];
      if (cur.count({cl, cr})) {
        gs[num[{cl, cr}]].push_back(id);
      } else {
        cur.insert({cl, cr});
        while (true) {
          auto it = seg.lower_bound(make_pair(cl, -1));
          if (it != seg.end() && it->second <= cr) {
            g[uk].push_back(num[*it]);
            seg.erase(it);
          } else {
            break;
          }
        }
        vert_l[uk] = cl;
        vert_r[uk] = cr;
        gs[uk].push_back(id);
        num[{cl, cr}] = uk++;
      }
    } 
    for (auto p : cur) {
      seg.insert(p);
    }
  }
  vector <bool> rt(uk, true);
  for (int i = 1; i < uk; ++i) {
    for (int j : g[i]) {
      rt[j] = false;
    }
  }
  for (int i = 1; i < uk; ++i) {
    if (rt[i]) {
      g[0].push_back(i);
    }
  }
  vert_l[0] = 0, vert_r[0] = n - 1;
  vector <int> leaf(n);
  set <int> free;
  for (int i = 0; i < n; ++i) free.insert(i);
  vector <int> par(uk);
  vector <int> e;
  function <void(int, int)> dfs = [&] (int u, int p) {
    e.push_back(u);
    el[u] = (int)e.size() - 1;
    par[u] = p;
    for (auto v : g[u]) {
      dfs(v, u);
    }
    while (true) {
      auto it = free.lower_bound(vert_l[u]);
      if (it != free.end() && (*it) <= vert_r[u]) {
        leaf[*it] = u;
        free.erase(it);
      } else {
        break;
      }
    }
    er[u] = (int)e.size() - 1;
  };  
  dfs(0, -1);
  for (int i = 0; i < uk; ++i) {
    for (int id : gs[i]) {
      cost[i] += c[id];
    }
  }
  vector <vector <ll>> dp(uk, vector <ll> (2));
  vector <ll> sum(uk);
  Fenwick f1((int)e.size()), f2((int)e.size());
  auto get_vert = [&] (Fenwick &f, int v) {
    if (v == -1) return 0LL;
    return f.get(el[v]);
  };
  function <void(int)> zhfs = [&] (int u) {
    for (auto v : g[u]) {
      zhfs(v);
      sum[u] += min(dp[v][0], dp[v][1]);
    }
    dp[u][0] = sum[u] + cost[u];
    dp[u][1] = dp[u][0];
    f1.update(el[u], er[u], sum[u] + cost[u]);
    for (int id : gs[u]) {
      int l = leaf[y[id]];
      ll total = -c[id] + get_vert(f1, l) - get_vert(f1, par[u]) + get_vert(f2, l) - get_vert(f2, u);
      dp[u][1] = min(dp[u][1], total);
    }
    f2.update(el[u], er[u], -min(dp[u][0], dp[u][1]));
  };
  zhfs(0);
  cout << dp[0][0] << '\n';
}

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 9856 KB Output is correct
2 Correct 10 ms 9856 KB Output is correct
3 Correct 10 ms 9856 KB Output is correct
4 Correct 10 ms 9856 KB Output is correct
5 Correct 10 ms 9856 KB Output is correct
6 Correct 10 ms 9856 KB Output is correct
7 Correct 10 ms 9856 KB Output is correct
8 Correct 10 ms 9856 KB Output is correct
9 Correct 10 ms 9856 KB Output is correct
10 Correct 10 ms 9856 KB Output is correct
11 Correct 10 ms 9856 KB Output is correct
12 Correct 10 ms 9856 KB Output is correct
13 Correct 10 ms 9856 KB Output is correct
14 Correct 10 ms 9856 KB Output is correct
15 Correct 10 ms 9856 KB Output is correct
16 Correct 10 ms 9856 KB Output is correct
17 Correct 10 ms 9856 KB Output is correct
18 Correct 10 ms 9856 KB Output is correct
19 Correct 10 ms 9856 KB Output is correct
20 Correct 10 ms 9856 KB Output is correct
21 Correct 10 ms 9856 KB Output is correct
22 Correct 10 ms 9856 KB Output is correct

Subtask #2
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 9856 KB Output is correct
2 Correct 10 ms 9856 KB Output is correct
3 Correct 10 ms 9856 KB Output is correct
4 Correct 10 ms 9856 KB Output is correct
5 Correct 10 ms 9856 KB Output is correct
6 Correct 10 ms 9856 KB Output is correct
7 Correct 10 ms 9856 KB Output is correct
8 Correct 10 ms 9856 KB Output is correct
9 Correct 10 ms 9856 KB Output is correct
10 Correct 10 ms 9856 KB Output is correct
11 Correct 10 ms 9856 KB Output is correct
12 Correct 10 ms 9856 KB Output is correct
13 Correct 10 ms 9856 KB Output is correct
14 Correct 10 ms 9856 KB Output is correct
15 Correct 10 ms 9856 KB Output is correct
16 Correct 10 ms 9856 KB Output is correct
17 Correct 10 ms 9856 KB Output is correct
18 Correct 10 ms 9856 KB Output is correct
19 Correct 10 ms 9856 KB Output is correct
20 Correct 10 ms 9856 KB Output is correct
21 Correct 10 ms 9856 KB Output is correct
22 Correct 10 ms 9856 KB Output is correct
23 Correct 13 ms 10368 KB Output is correct
24 Correct 14 ms 10368 KB Output is correct
25 Correct 13 ms 10496 KB Output is correct
26 Correct 14 ms 10496 KB Output is correct
27 Correct 14 ms 10496 KB Output is correct
28 Correct 13 ms 10488 KB Output is correct
29 Correct 13 ms 10368 KB Output is correct
30 Correct 15 ms 10496 KB Output is correct
31 Correct 14 ms 10368 KB Output is correct
32 Correct 14 ms 10368 KB Output is correct
33 Correct 12 ms 10368 KB Output is correct
34 Correct 12 ms 10368 KB Output is correct
35 Correct 12 ms 10368 KB Output is correct
36 Correct 12 ms 10368 KB Output is correct
37 Correct 12 ms 10368 KB Output is correct
38 Correct 13 ms 10496 KB Output is correct
39 Correct 13 ms 10112 KB Output is correct
40 Correct 14 ms 10360 KB Output is correct
41 Correct 12 ms 10112 KB Output is correct
42 Correct 12 ms 10112 KB Output is correct
43 Correct 12 ms 10368 KB Output is correct
44 Correct 12 ms 10112 KB Output is correct

Subtask #3
65.0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 9856 KB Output is correct
2 Correct 10 ms 9856 KB Output is correct
3 Correct 10 ms 9856 KB Output is correct
4 Correct 10 ms 9856 KB Output is correct
5 Correct 10 ms 9856 KB Output is correct
6 Correct 10 ms 9856 KB Output is correct
7 Correct 10 ms 9856 KB Output is correct
8 Correct 10 ms 9856 KB Output is correct
9 Correct 10 ms 9856 KB Output is correct
10 Correct 10 ms 9856 KB Output is correct
11 Correct 10 ms 9856 KB Output is correct
12 Correct 10 ms 9856 KB Output is correct
13 Correct 10 ms 9856 KB Output is correct
14 Correct 10 ms 9856 KB Output is correct
15 Correct 10 ms 9856 KB Output is correct
16 Correct 10 ms 9856 KB Output is correct
17 Correct 10 ms 9856 KB Output is correct
18 Correct 10 ms 9856 KB Output is correct
19 Correct 10 ms 9856 KB Output is correct
20 Correct 10 ms 9856 KB Output is correct
21 Correct 10 ms 9856 KB Output is correct
22 Correct 10 ms 9856 KB Output is correct
23 Correct 13 ms 10368 KB Output is correct
24 Correct 14 ms 10368 KB Output is correct
25 Correct 13 ms 10496 KB Output is correct
26 Correct 14 ms 10496 KB Output is correct
27 Correct 14 ms 10496 KB Output is correct
28 Correct 13 ms 10488 KB Output is correct
29 Correct 13 ms 10368 KB Output is correct
30 Correct 15 ms 10496 KB Output is correct
31 Correct 14 ms 10368 KB Output is correct
32 Correct 14 ms 10368 KB Output is correct
33 Correct 12 ms 10368 KB Output is correct
34 Correct 12 ms 10368 KB Output is correct
35 Correct 12 ms 10368 KB Output is correct
36 Correct 12 ms 10368 KB Output is correct
37 Correct 12 ms 10368 KB Output is correct
38 Correct 13 ms 10496 KB Output is correct
39 Correct 13 ms 10112 KB Output is correct
40 Correct 14 ms 10360 KB Output is correct
41 Correct 12 ms 10112 KB Output is correct
42 Correct 12 ms 10112 KB Output is correct
43 Correct 12 ms 10368 KB Output is correct
44 Correct 12 ms 10112 KB Output is correct
45 Correct 886 ms 72952 KB Output is correct
46 Correct 838 ms 71672 KB Output is correct
47 Correct 903 ms 72988 KB Output is correct
48 Correct 849 ms 71928 KB Output is correct
49 Correct 829 ms 71676 KB Output is correct
50 Correct 820 ms 71032 KB Output is correct
51 Correct 844 ms 72184 KB Output is correct
52 Correct 843 ms 73464 KB Output is correct
53 Correct 823 ms 71800 KB Output is correct
54 Correct 362 ms 72308 KB Output is correct
55 Correct 387 ms 76016 KB Output is correct
56 Correct 361 ms 74612 KB Output is correct
57 Correct 372 ms 73964 KB Output is correct
58 Correct 298 ms 65904 KB Output is correct
59 Correct 300 ms 66032 KB Output is correct
60 Correct 343 ms 77948 KB Output is correct
61 Correct 346 ms 49272 KB Output is correct
62 Correct 355 ms 69652 KB Output is correct
63 Correct 312 ms 48356 KB Output is correct
64 Correct 331 ms 48120 KB Output is correct
65 Correct 338 ms 69620 KB Output is correct
66 Correct 317 ms 47604 KB Output is correct