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답안 #218129

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
218129 2020-04-01T09:54:31 Z fedoseevtimofey 별자리 3 (JOI20_constellation3) C++14
35 / 100
 1500 ms 76400 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 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];

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);
  function <void(int, int)> dfs = [&] (int u, int p) {
    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;
      }
    }
  };  
  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);
  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];
    for (int id : gs[u]) {
      int l = leaf[y[id]];
      ll total = -c[id];
      int prev = -1;
      while (l != par[u]) {
        total += cost[l];
        for (auto v : g[l]) {
          if (v != prev) {
            total += min(dp[v][0], dp[v][1]);
          }
        }
        prev = l;
        l = par[l];
      }
      dp[u][1] = min(dp[u][1], total);
    }
  };
  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 16 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 11 ms 9856 KB Output is correct
7 Correct 10 ms 9856 KB Output is correct
8 Correct 13 ms 9856 KB Output is correct
9 Correct 10 ms 9856 KB Output is correct
10 Correct 13 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 13 ms 9856 KB Output is correct
21 Correct 10 ms 9856 KB Output is correct
22 Correct 11 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 16 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 11 ms 9856 KB Output is correct
7 Correct 10 ms 9856 KB Output is correct
8 Correct 13 ms 9856 KB Output is correct
9 Correct 10 ms 9856 KB Output is correct
10 Correct 13 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 13 ms 9856 KB Output is correct
21 Correct 10 ms 9856 KB Output is correct
22 Correct 11 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 10368 KB Output is correct
26 Correct 16 ms 10368 KB Output is correct
27 Correct 13 ms 10368 KB Output is correct
28 Correct 14 ms 10368 KB Output is correct
29 Correct 13 ms 10368 KB Output is correct
30 Correct 14 ms 10368 KB Output is correct
31 Correct 14 ms 10368 KB Output is correct
32 Correct 14 ms 10368 KB Output is correct
33 Correct 15 ms 10368 KB Output is correct
34 Correct 14 ms 10368 KB Output is correct
35 Correct 14 ms 10368 KB Output is correct
36 Correct 14 ms 10368 KB Output is correct
37 Correct 14 ms 10368 KB Output is correct
38 Correct 12 ms 10368 KB Output is correct
39 Correct 16 ms 10240 KB Output is correct
40 Correct 14 ms 10368 KB Output is correct
41 Correct 12 ms 10112 KB Output is correct
42 Correct 12 ms 10112 KB Output is correct
43 Correct 14 ms 10368 KB Output is correct
44 Correct 12 ms 10112 KB Output is correct

Subtask #3
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 16 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 11 ms 9856 KB Output is correct
7 Correct 10 ms 9856 KB Output is correct
8 Correct 13 ms 9856 KB Output is correct
9 Correct 10 ms 9856 KB Output is correct
10 Correct 13 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 13 ms 9856 KB Output is correct
21 Correct 10 ms 9856 KB Output is correct
22 Correct 11 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 10368 KB Output is correct
26 Correct 16 ms 10368 KB Output is correct
27 Correct 13 ms 10368 KB Output is correct
28 Correct 14 ms 10368 KB Output is correct
29 Correct 13 ms 10368 KB Output is correct
30 Correct 14 ms 10368 KB Output is correct
31 Correct 14 ms 10368 KB Output is correct
32 Correct 14 ms 10368 KB Output is correct
33 Correct 15 ms 10368 KB Output is correct
34 Correct 14 ms 10368 KB Output is correct
35 Correct 14 ms 10368 KB Output is correct
36 Correct 14 ms 10368 KB Output is correct
37 Correct 14 ms 10368 KB Output is correct
38 Correct 12 ms 10368 KB Output is correct
39 Correct 16 ms 10240 KB Output is correct
40 Correct 14 ms 10368 KB Output is correct
41 Correct 12 ms 10112 KB Output is correct
42 Correct 12 ms 10112 KB Output is correct
43 Correct 14 ms 10368 KB Output is correct
44 Correct 12 ms 10112 KB Output is correct
45 Correct 821 ms 72824 KB Output is correct
46 Correct 770 ms 71544 KB Output is correct
47 Correct 847 ms 72840 KB Output is correct
48 Correct 858 ms 71660 KB Output is correct
49 Correct 833 ms 71492 KB Output is correct
50 Correct 820 ms 70872 KB Output is correct
51 Correct 823 ms 71928 KB Output is correct
52 Correct 839 ms 72912 KB Output is correct
53 Correct 807 ms 71648 KB Output is correct
54 Execution timed out 1594 ms 76400 KB Time limit exceeded
55 Halted 0 ms 0 KB -