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답안 #894259

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
894259 2023-12-28T03:08:36 Z box The short shank; Redemption (BOI21_prison) C++17
100 / 100
 515 ms 258376 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define ar array
#define sz(v) static_cast<int>(v.size())
#define all(v) (v).begin(), (v).end()
typedef long long ll;
typedef pair<ll, int> pi;
typedef vector<int> vi;
 
const int N = 2e6;
 
int n, d, t, a[N], p[N], q[N];
 
vi g[N];
int c[N], dp[N];
 
void dfs(int i) {
  c[i] = -1;
  dp[i] = 1;
  for (int j : g[i]) {
    dfs(j);
    if (dp[j] + 1 > dp[i]) {
      dp[i] = dp[j] + 1;
      c[i] = j;
    }
  }
}
 
int main() {
  cin.tie(0)->sync_with_stdio(0);
 
  cin >> n >> d >> t, d++;
  for (int i = 0; i < n; i++) cin >> a[i];
 
  vi stk;
  auto f = [&](int i) { return a[i] - i; };
  for (int i = 0; i < n; i++) {
    while (sz(stk) && f(stk.back()) >= f(i)) stk.pop_back();
    stk.push_back(i);
    if (f(stk[0]) > t - i)
      p[i] = -1;
    else {
      int low = 0, hi = sz(stk) - 1;
      while (low < hi) {
        int m = (low + hi) / 2 + 1;
        if (f(stk[m]) <= t - i)
          low = m;
        else
          hi = m - 1;
      }
      assert(f(stk[low]) <= t - i);
      p[i] = stk[low];
    }
  }
 
  vi imp;
 
  int ans = n;
 
  for (int i = 0; i < n; i++) {
    if (p[i] != -1 && p[i] < i) {
      imp.push_back(i);
    }
    if (p[i] == -1) ans--;
  }
  vi rev = imp;
  reverse(all(rev));
  stk = vi();
 
  vi all;
 
  for (int i : rev) {
    if (!sz(stk) || p[stk[0]] >= i)
      q[i] = -1;
    else {
      int low = 0, hi = sz(stk) - 1;
      while (low < hi) {
        int m = (low + hi) / 2 + 1;
        if (p[stk[m]] < i)
          low = m;
        else
          hi = m - 1;
      }
      q[i] = stk[low];
    }
    while (sz(stk) && p[stk.back()] >= p[i]) stk.pop_back();
    stk.push_back(i);
    all.push_back(i);
  }
  for (int i : imp)
    if (~q[i]) g[q[i]].push_back(i);
  priority_queue<pair<int, int>> pq;
  for (int i : imp)
    if (q[i] == -1) {
      dfs(i);
      pq.push({dp[i], i});
    }
  while (d > 1 && sz(pq)) {
    d--;
    auto [x, i] = pq.top();
    pq.pop();
    ans -= x;
    while (~i) {
      for (int j : g[i])
        if (j != c[i]) pq.push({dp[j], j});
      i = c[i];
    }
  }
  cout << ans << '\n';
}

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 55640 KB Output is correct
2 Correct 12 ms 55644 KB Output is correct
3 Correct 12 ms 55640 KB Output is correct
4 Correct 12 ms 55644 KB Output is correct
5 Correct 14 ms 55892 KB Output is correct
6 Correct 12 ms 55644 KB Output is correct
7 Correct 12 ms 55888 KB Output is correct
8 Correct 12 ms 55644 KB Output is correct
9 Correct 12 ms 55644 KB Output is correct
10 Correct 12 ms 55644 KB Output is correct
11 Correct 11 ms 55792 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 55856 KB Output is correct
2 Correct 82 ms 79444 KB Output is correct
3 Correct 84 ms 76308 KB Output is correct
4 Correct 116 ms 81048 KB Output is correct
5 Correct 82 ms 80492 KB Output is correct
6 Correct 73 ms 80488 KB Output is correct
7 Correct 117 ms 122924 KB Output is correct
8 Correct 84 ms 81944 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 55640 KB Output is correct
2 Correct 12 ms 55644 KB Output is correct
3 Correct 12 ms 55640 KB Output is correct
4 Correct 12 ms 55644 KB Output is correct
5 Correct 14 ms 55892 KB Output is correct
6 Correct 12 ms 55644 KB Output is correct
7 Correct 12 ms 55888 KB Output is correct
8 Correct 12 ms 55644 KB Output is correct
9 Correct 12 ms 55644 KB Output is correct
10 Correct 12 ms 55644 KB Output is correct
11 Correct 11 ms 55792 KB Output is correct
12 Correct 12 ms 55644 KB Output is correct
13 Correct 12 ms 55876 KB Output is correct
14 Correct 12 ms 55644 KB Output is correct
15 Correct 12 ms 55860 KB Output is correct
16 Correct 12 ms 55644 KB Output is correct
17 Correct 12 ms 55644 KB Output is correct
18 Correct 12 ms 55644 KB Output is correct
19 Correct 13 ms 55644 KB Output is correct
20 Correct 12 ms 55644 KB Output is correct
21 Correct 12 ms 55860 KB Output is correct
22 Correct 14 ms 55640 KB Output is correct
23 Correct 13 ms 55904 KB Output is correct
24 Correct 12 ms 55900 KB Output is correct
25 Correct 12 ms 56000 KB Output is correct
26 Correct 14 ms 55896 KB Output is correct
27 Correct 14 ms 55992 KB Output is correct
28 Correct 12 ms 55896 KB Output is correct
29 Correct 13 ms 55900 KB Output is correct
30 Correct 12 ms 55896 KB Output is correct
31 Correct 13 ms 55896 KB Output is correct
32 Correct 13 ms 55972 KB Output is correct
33 Correct 12 ms 55900 KB Output is correct
34 Correct 12 ms 55900 KB Output is correct
35 Correct 12 ms 55900 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 55864 KB Output is correct
2 Correct 22 ms 60676 KB Output is correct
3 Correct 25 ms 60244 KB Output is correct
4 Correct 35 ms 62756 KB Output is correct
5 Correct 28 ms 64008 KB Output is correct
6 Correct 36 ms 64028 KB Output is correct
7 Correct 22 ms 59992 KB Output is correct
8 Correct 19 ms 59996 KB Output is correct
9 Correct 25 ms 66392 KB Output is correct
10 Correct 19 ms 59740 KB Output is correct

Subtask #5
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 55640 KB Output is correct
2 Correct 12 ms 55644 KB Output is correct
3 Correct 12 ms 55640 KB Output is correct
4 Correct 12 ms 55644 KB Output is correct
5 Correct 14 ms 55892 KB Output is correct
6 Correct 12 ms 55644 KB Output is correct
7 Correct 12 ms 55888 KB Output is correct
8 Correct 12 ms 55644 KB Output is correct
9 Correct 12 ms 55644 KB Output is correct
10 Correct 12 ms 55644 KB Output is correct
11 Correct 11 ms 55792 KB Output is correct
12 Correct 12 ms 55644 KB Output is correct
13 Correct 12 ms 55876 KB Output is correct
14 Correct 12 ms 55644 KB Output is correct
15 Correct 12 ms 55860 KB Output is correct
16 Correct 12 ms 55644 KB Output is correct
17 Correct 12 ms 55644 KB Output is correct
18 Correct 12 ms 55644 KB Output is correct
19 Correct 13 ms 55644 KB Output is correct
20 Correct 12 ms 55644 KB Output is correct
21 Correct 12 ms 55860 KB Output is correct
22 Correct 14 ms 55640 KB Output is correct
23 Correct 13 ms 55904 KB Output is correct
24 Correct 12 ms 55900 KB Output is correct
25 Correct 12 ms 56000 KB Output is correct
26 Correct 14 ms 55896 KB Output is correct
27 Correct 14 ms 55992 KB Output is correct
28 Correct 12 ms 55896 KB Output is correct
29 Correct 13 ms 55900 KB Output is correct
30 Correct 12 ms 55896 KB Output is correct
31 Correct 13 ms 55896 KB Output is correct
32 Correct 13 ms 55972 KB Output is correct
33 Correct 12 ms 55900 KB Output is correct
34 Correct 12 ms 55900 KB Output is correct
35 Correct 12 ms 55900 KB Output is correct
36 Correct 12 ms 55864 KB Output is correct
37 Correct 22 ms 60676 KB Output is correct
38 Correct 25 ms 60244 KB Output is correct
39 Correct 35 ms 62756 KB Output is correct
40 Correct 28 ms 64008 KB Output is correct
41 Correct 36 ms 64028 KB Output is correct
42 Correct 22 ms 59992 KB Output is correct
43 Correct 19 ms 59996 KB Output is correct
44 Correct 25 ms 66392 KB Output is correct
45 Correct 19 ms 59740 KB Output is correct
46 Correct 11 ms 55640 KB Output is correct
47 Correct 11 ms 55644 KB Output is correct
48 Correct 11 ms 55644 KB Output is correct
49 Correct 12 ms 55644 KB Output is correct
50 Correct 11 ms 55644 KB Output is correct
51 Correct 11 ms 55896 KB Output is correct
52 Correct 11 ms 55640 KB Output is correct
53 Correct 11 ms 55888 KB Output is correct
54 Correct 11 ms 55640 KB Output is correct
55 Correct 11 ms 55892 KB Output is correct
56 Correct 11 ms 55752 KB Output is correct
57 Correct 14 ms 55900 KB Output is correct
58 Correct 12 ms 55900 KB Output is correct
59 Correct 12 ms 55900 KB Output is correct
60 Correct 12 ms 55876 KB Output is correct
61 Correct 13 ms 55896 KB Output is correct
62 Correct 12 ms 55908 KB Output is correct
63 Correct 12 ms 55900 KB Output is correct
64 Correct 12 ms 55872 KB Output is correct
65 Correct 12 ms 55900 KB Output is correct
66 Correct 12 ms 55900 KB Output is correct
67 Correct 12 ms 55900 KB Output is correct
68 Correct 15 ms 55900 KB Output is correct
69 Correct 14 ms 55868 KB Output is correct
70 Correct 13 ms 55640 KB Output is correct
71 Correct 22 ms 60500 KB Output is correct
72 Correct 22 ms 60252 KB Output is correct
73 Correct 28 ms 62668 KB Output is correct
74 Correct 28 ms 64076 KB Output is correct
75 Correct 29 ms 64068 KB Output is correct
76 Correct 21 ms 60164 KB Output is correct
77 Correct 21 ms 59960 KB Output is correct
78 Correct 26 ms 66392 KB Output is correct
79 Correct 21 ms 59740 KB Output is correct
80 Correct 28 ms 60212 KB Output is correct
81 Correct 24 ms 60580 KB Output is correct
82 Correct 29 ms 60252 KB Output is correct
83 Correct 26 ms 61512 KB Output is correct
84 Correct 21 ms 59956 KB Output is correct
85 Correct 28 ms 64344 KB Output is correct
86 Correct 23 ms 61012 KB Output is correct
87 Correct 26 ms 59764 KB Output is correct
88 Correct 25 ms 64860 KB Output is correct
89 Correct 24 ms 66144 KB Output is correct
90 Correct 30 ms 64032 KB Output is correct

Subtask #6
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 55640 KB Output is correct
2 Correct 12 ms 55644 KB Output is correct
3 Correct 12 ms 55640 KB Output is correct
4 Correct 12 ms 55644 KB Output is correct
5 Correct 14 ms 55892 KB Output is correct
6 Correct 12 ms 55644 KB Output is correct
7 Correct 12 ms 55888 KB Output is correct
8 Correct 12 ms 55644 KB Output is correct
9 Correct 12 ms 55644 KB Output is correct
10 Correct 12 ms 55644 KB Output is correct
11 Correct 11 ms 55792 KB Output is correct
12 Correct 13 ms 55856 KB Output is correct
13 Correct 82 ms 79444 KB Output is correct
14 Correct 84 ms 76308 KB Output is correct
15 Correct 116 ms 81048 KB Output is correct
16 Correct 82 ms 80492 KB Output is correct
17 Correct 73 ms 80488 KB Output is correct
18 Correct 117 ms 122924 KB Output is correct
19 Correct 84 ms 81944 KB Output is correct
20 Correct 12 ms 55644 KB Output is correct
21 Correct 12 ms 55876 KB Output is correct
22 Correct 12 ms 55644 KB Output is correct
23 Correct 12 ms 55860 KB Output is correct
24 Correct 12 ms 55644 KB Output is correct
25 Correct 12 ms 55644 KB Output is correct
26 Correct 12 ms 55644 KB Output is correct
27 Correct 13 ms 55644 KB Output is correct
28 Correct 12 ms 55644 KB Output is correct
29 Correct 12 ms 55860 KB Output is correct
30 Correct 14 ms 55640 KB Output is correct
31 Correct 13 ms 55904 KB Output is correct
32 Correct 12 ms 55900 KB Output is correct
33 Correct 12 ms 56000 KB Output is correct
34 Correct 14 ms 55896 KB Output is correct
35 Correct 14 ms 55992 KB Output is correct
36 Correct 12 ms 55896 KB Output is correct
37 Correct 13 ms 55900 KB Output is correct
38 Correct 12 ms 55896 KB Output is correct
39 Correct 13 ms 55896 KB Output is correct
40 Correct 13 ms 55972 KB Output is correct
41 Correct 12 ms 55900 KB Output is correct
42 Correct 12 ms 55900 KB Output is correct
43 Correct 12 ms 55900 KB Output is correct
44 Correct 12 ms 55864 KB Output is correct
45 Correct 22 ms 60676 KB Output is correct
46 Correct 25 ms 60244 KB Output is correct
47 Correct 35 ms 62756 KB Output is correct
48 Correct 28 ms 64008 KB Output is correct
49 Correct 36 ms 64028 KB Output is correct
50 Correct 22 ms 59992 KB Output is correct
51 Correct 19 ms 59996 KB Output is correct
52 Correct 25 ms 66392 KB Output is correct
53 Correct 19 ms 59740 KB Output is correct
54 Correct 11 ms 55640 KB Output is correct
55 Correct 11 ms 55644 KB Output is correct
56 Correct 11 ms 55644 KB Output is correct
57 Correct 12 ms 55644 KB Output is correct
58 Correct 11 ms 55644 KB Output is correct
59 Correct 11 ms 55896 KB Output is correct
60 Correct 11 ms 55640 KB Output is correct
61 Correct 11 ms 55888 KB Output is correct
62 Correct 11 ms 55640 KB Output is correct
63 Correct 11 ms 55892 KB Output is correct
64 Correct 11 ms 55752 KB Output is correct
65 Correct 14 ms 55900 KB Output is correct
66 Correct 12 ms 55900 KB Output is correct
67 Correct 12 ms 55900 KB Output is correct
68 Correct 12 ms 55876 KB Output is correct
69 Correct 13 ms 55896 KB Output is correct
70 Correct 12 ms 55908 KB Output is correct
71 Correct 12 ms 55900 KB Output is correct
72 Correct 12 ms 55872 KB Output is correct
73 Correct 12 ms 55900 KB Output is correct
74 Correct 12 ms 55900 KB Output is correct
75 Correct 12 ms 55900 KB Output is correct
76 Correct 15 ms 55900 KB Output is correct
77 Correct 14 ms 55868 KB Output is correct
78 Correct 13 ms 55640 KB Output is correct
79 Correct 22 ms 60500 KB Output is correct
80 Correct 22 ms 60252 KB Output is correct
81 Correct 28 ms 62668 KB Output is correct
82 Correct 28 ms 64076 KB Output is correct
83 Correct 29 ms 64068 KB Output is correct
84 Correct 21 ms 60164 KB Output is correct
85 Correct 21 ms 59960 KB Output is correct
86 Correct 26 ms 66392 KB Output is correct
87 Correct 21 ms 59740 KB Output is correct
88 Correct 28 ms 60212 KB Output is correct
89 Correct 24 ms 60580 KB Output is correct
90 Correct 29 ms 60252 KB Output is correct
91 Correct 26 ms 61512 KB Output is correct
92 Correct 21 ms 59956 KB Output is correct
93 Correct 28 ms 64344 KB Output is correct
94 Correct 23 ms 61012 KB Output is correct
95 Correct 26 ms 59764 KB Output is correct
96 Correct 25 ms 64860 KB Output is correct
97 Correct 24 ms 66144 KB Output is correct
98 Correct 30 ms 64032 KB Output is correct
99 Correct 11 ms 55644 KB Output is correct
100 Correct 12 ms 55644 KB Output is correct
101 Correct 13 ms 55644 KB Output is correct
102 Correct 12 ms 55644 KB Output is correct
103 Correct 13 ms 55644 KB Output is correct
104 Correct 11 ms 55640 KB Output is correct
105 Correct 12 ms 55884 KB Output is correct
106 Correct 11 ms 55860 KB Output is correct
107 Correct 12 ms 55640 KB Output is correct
108 Correct 12 ms 55888 KB Output is correct
109 Correct 13 ms 55644 KB Output is correct
110 Correct 11 ms 55816 KB Output is correct
111 Correct 83 ms 79544 KB Output is correct
112 Correct 75 ms 76320 KB Output is correct
113 Correct 110 ms 81044 KB Output is correct
114 Correct 92 ms 80400 KB Output is correct
115 Correct 74 ms 80288 KB Output is correct
116 Correct 107 ms 122908 KB Output is correct
117 Correct 75 ms 82044 KB Output is correct
118 Correct 12 ms 55900 KB Output is correct
119 Correct 12 ms 55908 KB Output is correct
120 Correct 12 ms 56040 KB Output is correct
121 Correct 15 ms 55816 KB Output is correct
122 Correct 13 ms 55900 KB Output is correct
123 Correct 12 ms 55900 KB Output is correct
124 Correct 15 ms 55872 KB Output is correct
125 Correct 13 ms 55900 KB Output is correct
126 Correct 12 ms 55808 KB Output is correct
127 Correct 12 ms 55900 KB Output is correct
128 Correct 12 ms 55900 KB Output is correct
129 Correct 12 ms 55900 KB Output is correct
130 Correct 13 ms 55900 KB Output is correct
131 Correct 12 ms 55868 KB Output is correct
132 Correct 25 ms 60508 KB Output is correct
133 Correct 27 ms 60252 KB Output is correct
134 Correct 28 ms 62680 KB Output is correct
135 Correct 28 ms 64024 KB Output is correct
136 Correct 27 ms 64148 KB Output is correct
137 Correct 20 ms 59996 KB Output is correct
138 Correct 20 ms 59996 KB Output is correct
139 Correct 32 ms 66392 KB Output is correct
140 Correct 19 ms 59736 KB Output is correct
141 Correct 22 ms 60216 KB Output is correct
142 Correct 24 ms 60484 KB Output is correct
143 Correct 23 ms 60252 KB Output is correct
144 Correct 28 ms 61404 KB Output is correct
145 Correct 20 ms 60180 KB Output is correct
146 Correct 28 ms 64332 KB Output is correct
147 Correct 23 ms 61020 KB Output is correct
148 Correct 22 ms 59736 KB Output is correct
149 Correct 25 ms 64860 KB Output is correct
150 Correct 27 ms 66108 KB Output is correct
151 Correct 24 ms 63904 KB Output is correct
152 Correct 295 ms 137404 KB Output is correct
153 Correct 310 ms 147092 KB Output is correct
154 Correct 302 ms 134056 KB Output is correct
155 Correct 515 ms 180428 KB Output is correct
156 Correct 314 ms 147708 KB Output is correct
157 Correct 245 ms 128656 KB Output is correct
158 Correct 276 ms 156220 KB Output is correct
159 Correct 378 ms 258376 KB Output is correct
160 Correct 375 ms 242824 KB Output is correct
161 Correct 258 ms 121552 KB Output is correct
162 Correct 239 ms 128960 KB Output is correct