oj.uz

답안 #807544

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
807544 2023-08-04T19:13:13 Z dong_liu The short shank; Redemption (BOI21_prison) C++17
100 / 100
 501 ms 256584 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 24 ms 47304 KB Output is correct
2 Correct 24 ms 47260 KB Output is correct
3 Correct 23 ms 47324 KB Output is correct
4 Correct 25 ms 47228 KB Output is correct
5 Correct 24 ms 47316 KB Output is correct
6 Correct 25 ms 47316 KB Output is correct
7 Correct 25 ms 47332 KB Output is correct
8 Correct 24 ms 47316 KB Output is correct
9 Correct 25 ms 47332 KB Output is correct
10 Correct 24 ms 47296 KB Output is correct
11 Correct 24 ms 47232 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 47304 KB Output is correct
2 Correct 95 ms 69904 KB Output is correct
3 Correct 92 ms 66760 KB Output is correct
4 Correct 121 ms 72008 KB Output is correct
5 Correct 98 ms 71484 KB Output is correct
6 Correct 85 ms 70064 KB Output is correct
7 Correct 117 ms 113624 KB Output is correct
8 Correct 104 ms 72260 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 47304 KB Output is correct
2 Correct 24 ms 47260 KB Output is correct
3 Correct 23 ms 47324 KB Output is correct
4 Correct 25 ms 47228 KB Output is correct
5 Correct 24 ms 47316 KB Output is correct
6 Correct 25 ms 47316 KB Output is correct
7 Correct 25 ms 47332 KB Output is correct
8 Correct 24 ms 47316 KB Output is correct
9 Correct 25 ms 47332 KB Output is correct
10 Correct 24 ms 47296 KB Output is correct
11 Correct 24 ms 47232 KB Output is correct
12 Correct 22 ms 47300 KB Output is correct
13 Correct 24 ms 47348 KB Output is correct
14 Correct 23 ms 47308 KB Output is correct
15 Correct 23 ms 47260 KB Output is correct
16 Correct 23 ms 47316 KB Output is correct
17 Correct 24 ms 47248 KB Output is correct
18 Correct 25 ms 47312 KB Output is correct
19 Correct 25 ms 47308 KB Output is correct
20 Correct 24 ms 47292 KB Output is correct
21 Correct 25 ms 47316 KB Output is correct
22 Correct 24 ms 47304 KB Output is correct
23 Correct 24 ms 47548 KB Output is correct
24 Correct 25 ms 47436 KB Output is correct
25 Correct 26 ms 47520 KB Output is correct
26 Correct 25 ms 47444 KB Output is correct
27 Correct 28 ms 47428 KB Output is correct
28 Correct 24 ms 47444 KB Output is correct
29 Correct 24 ms 47440 KB Output is correct
30 Correct 25 ms 47448 KB Output is correct
31 Correct 27 ms 47448 KB Output is correct
32 Correct 25 ms 47436 KB Output is correct
33 Correct 25 ms 47436 KB Output is correct
34 Correct 25 ms 47444 KB Output is correct
35 Correct 25 ms 47476 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 47304 KB Output is correct
2 Correct 42 ms 51280 KB Output is correct
3 Correct 36 ms 50888 KB Output is correct
4 Correct 42 ms 53432 KB Output is correct
5 Correct 41 ms 54600 KB Output is correct
6 Correct 41 ms 54720 KB Output is correct
7 Correct 33 ms 50752 KB Output is correct
8 Correct 33 ms 50340 KB Output is correct
9 Correct 42 ms 57204 KB Output is correct
10 Correct 33 ms 50416 KB Output is correct

Subtask #5
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 47304 KB Output is correct
2 Correct 24 ms 47260 KB Output is correct
3 Correct 23 ms 47324 KB Output is correct
4 Correct 25 ms 47228 KB Output is correct
5 Correct 24 ms 47316 KB Output is correct
6 Correct 25 ms 47316 KB Output is correct
7 Correct 25 ms 47332 KB Output is correct
8 Correct 24 ms 47316 KB Output is correct
9 Correct 25 ms 47332 KB Output is correct
10 Correct 24 ms 47296 KB Output is correct
11 Correct 24 ms 47232 KB Output is correct
12 Correct 22 ms 47300 KB Output is correct
13 Correct 24 ms 47348 KB Output is correct
14 Correct 23 ms 47308 KB Output is correct
15 Correct 23 ms 47260 KB Output is correct
16 Correct 23 ms 47316 KB Output is correct
17 Correct 24 ms 47248 KB Output is correct
18 Correct 25 ms 47312 KB Output is correct
19 Correct 25 ms 47308 KB Output is correct
20 Correct 24 ms 47292 KB Output is correct
21 Correct 25 ms 47316 KB Output is correct
22 Correct 24 ms 47304 KB Output is correct
23 Correct 24 ms 47548 KB Output is correct
24 Correct 25 ms 47436 KB Output is correct
25 Correct 26 ms 47520 KB Output is correct
26 Correct 25 ms 47444 KB Output is correct
27 Correct 28 ms 47428 KB Output is correct
28 Correct 24 ms 47444 KB Output is correct
29 Correct 24 ms 47440 KB Output is correct
30 Correct 25 ms 47448 KB Output is correct
31 Correct 27 ms 47448 KB Output is correct
32 Correct 25 ms 47436 KB Output is correct
33 Correct 25 ms 47436 KB Output is correct
34 Correct 25 ms 47444 KB Output is correct
35 Correct 25 ms 47476 KB Output is correct
36 Correct 24 ms 47304 KB Output is correct
37 Correct 42 ms 51280 KB Output is correct
38 Correct 36 ms 50888 KB Output is correct
39 Correct 42 ms 53432 KB Output is correct
40 Correct 41 ms 54600 KB Output is correct
41 Correct 41 ms 54720 KB Output is correct
42 Correct 33 ms 50752 KB Output is correct
43 Correct 33 ms 50340 KB Output is correct
44 Correct 42 ms 57204 KB Output is correct
45 Correct 33 ms 50416 KB Output is correct
46 Correct 25 ms 47316 KB Output is correct
47 Correct 25 ms 47316 KB Output is correct
48 Correct 24 ms 47316 KB Output is correct
49 Correct 24 ms 47312 KB Output is correct
50 Correct 24 ms 47272 KB Output is correct
51 Correct 24 ms 47296 KB Output is correct
52 Correct 24 ms 47308 KB Output is correct
53 Correct 24 ms 47348 KB Output is correct
54 Correct 25 ms 47236 KB Output is correct
55 Correct 24 ms 47316 KB Output is correct
56 Correct 24 ms 47236 KB Output is correct
57 Correct 25 ms 47468 KB Output is correct
58 Correct 25 ms 47504 KB Output is correct
59 Correct 29 ms 47472 KB Output is correct
60 Correct 25 ms 47480 KB Output is correct
61 Correct 25 ms 47444 KB Output is correct
62 Correct 29 ms 47504 KB Output is correct
63 Correct 24 ms 47444 KB Output is correct
64 Correct 24 ms 47444 KB Output is correct
65 Correct 25 ms 47444 KB Output is correct
66 Correct 30 ms 47464 KB Output is correct
67 Correct 26 ms 47476 KB Output is correct
68 Correct 24 ms 47452 KB Output is correct
69 Correct 25 ms 47520 KB Output is correct
70 Correct 25 ms 47300 KB Output is correct
71 Correct 36 ms 51288 KB Output is correct
72 Correct 35 ms 51052 KB Output is correct
73 Correct 47 ms 53496 KB Output is correct
74 Correct 40 ms 54636 KB Output is correct
75 Correct 40 ms 54728 KB Output is correct
76 Correct 33 ms 50772 KB Output is correct
77 Correct 34 ms 50388 KB Output is correct
78 Correct 44 ms 57296 KB Output is correct
79 Correct 41 ms 50380 KB Output is correct
80 Correct 36 ms 50876 KB Output is correct
81 Correct 37 ms 51272 KB Output is correct
82 Correct 35 ms 50892 KB Output is correct
83 Correct 45 ms 52224 KB Output is correct
84 Correct 34 ms 50904 KB Output is correct
85 Correct 45 ms 55116 KB Output is correct
86 Correct 36 ms 51788 KB Output is correct
87 Correct 35 ms 50256 KB Output is correct
88 Correct 37 ms 55712 KB Output is correct
89 Correct 38 ms 56852 KB Output is correct
90 Correct 38 ms 54720 KB Output is correct

Subtask #6
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 47304 KB Output is correct
2 Correct 24 ms 47260 KB Output is correct
3 Correct 23 ms 47324 KB Output is correct
4 Correct 25 ms 47228 KB Output is correct
5 Correct 24 ms 47316 KB Output is correct
6 Correct 25 ms 47316 KB Output is correct
7 Correct 25 ms 47332 KB Output is correct
8 Correct 24 ms 47316 KB Output is correct
9 Correct 25 ms 47332 KB Output is correct
10 Correct 24 ms 47296 KB Output is correct
11 Correct 24 ms 47232 KB Output is correct
12 Correct 24 ms 47304 KB Output is correct
13 Correct 95 ms 69904 KB Output is correct
14 Correct 92 ms 66760 KB Output is correct
15 Correct 121 ms 72008 KB Output is correct
16 Correct 98 ms 71484 KB Output is correct
17 Correct 85 ms 70064 KB Output is correct
18 Correct 117 ms 113624 KB Output is correct
19 Correct 104 ms 72260 KB Output is correct
20 Correct 22 ms 47300 KB Output is correct
21 Correct 24 ms 47348 KB Output is correct
22 Correct 23 ms 47308 KB Output is correct
23 Correct 23 ms 47260 KB Output is correct
24 Correct 23 ms 47316 KB Output is correct
25 Correct 24 ms 47248 KB Output is correct
26 Correct 25 ms 47312 KB Output is correct
27 Correct 25 ms 47308 KB Output is correct
28 Correct 24 ms 47292 KB Output is correct
29 Correct 25 ms 47316 KB Output is correct
30 Correct 24 ms 47304 KB Output is correct
31 Correct 24 ms 47548 KB Output is correct
32 Correct 25 ms 47436 KB Output is correct
33 Correct 26 ms 47520 KB Output is correct
34 Correct 25 ms 47444 KB Output is correct
35 Correct 28 ms 47428 KB Output is correct
36 Correct 24 ms 47444 KB Output is correct
37 Correct 24 ms 47440 KB Output is correct
38 Correct 25 ms 47448 KB Output is correct
39 Correct 27 ms 47448 KB Output is correct
40 Correct 25 ms 47436 KB Output is correct
41 Correct 25 ms 47436 KB Output is correct
42 Correct 25 ms 47444 KB Output is correct
43 Correct 25 ms 47476 KB Output is correct
44 Correct 24 ms 47304 KB Output is correct
45 Correct 42 ms 51280 KB Output is correct
46 Correct 36 ms 50888 KB Output is correct
47 Correct 42 ms 53432 KB Output is correct
48 Correct 41 ms 54600 KB Output is correct
49 Correct 41 ms 54720 KB Output is correct
50 Correct 33 ms 50752 KB Output is correct
51 Correct 33 ms 50340 KB Output is correct
52 Correct 42 ms 57204 KB Output is correct
53 Correct 33 ms 50416 KB Output is correct
54 Correct 25 ms 47316 KB Output is correct
55 Correct 25 ms 47316 KB Output is correct
56 Correct 24 ms 47316 KB Output is correct
57 Correct 24 ms 47312 KB Output is correct
58 Correct 24 ms 47272 KB Output is correct
59 Correct 24 ms 47296 KB Output is correct
60 Correct 24 ms 47308 KB Output is correct
61 Correct 24 ms 47348 KB Output is correct
62 Correct 25 ms 47236 KB Output is correct
63 Correct 24 ms 47316 KB Output is correct
64 Correct 24 ms 47236 KB Output is correct
65 Correct 25 ms 47468 KB Output is correct
66 Correct 25 ms 47504 KB Output is correct
67 Correct 29 ms 47472 KB Output is correct
68 Correct 25 ms 47480 KB Output is correct
69 Correct 25 ms 47444 KB Output is correct
70 Correct 29 ms 47504 KB Output is correct
71 Correct 24 ms 47444 KB Output is correct
72 Correct 24 ms 47444 KB Output is correct
73 Correct 25 ms 47444 KB Output is correct
74 Correct 30 ms 47464 KB Output is correct
75 Correct 26 ms 47476 KB Output is correct
76 Correct 24 ms 47452 KB Output is correct
77 Correct 25 ms 47520 KB Output is correct
78 Correct 25 ms 47300 KB Output is correct
79 Correct 36 ms 51288 KB Output is correct
80 Correct 35 ms 51052 KB Output is correct
81 Correct 47 ms 53496 KB Output is correct
82 Correct 40 ms 54636 KB Output is correct
83 Correct 40 ms 54728 KB Output is correct
84 Correct 33 ms 50772 KB Output is correct
85 Correct 34 ms 50388 KB Output is correct
86 Correct 44 ms 57296 KB Output is correct
87 Correct 41 ms 50380 KB Output is correct
88 Correct 36 ms 50876 KB Output is correct
89 Correct 37 ms 51272 KB Output is correct
90 Correct 35 ms 50892 KB Output is correct
91 Correct 45 ms 52224 KB Output is correct
92 Correct 34 ms 50904 KB Output is correct
93 Correct 45 ms 55116 KB Output is correct
94 Correct 36 ms 51788 KB Output is correct
95 Correct 35 ms 50256 KB Output is correct
96 Correct 37 ms 55712 KB Output is correct
97 Correct 38 ms 56852 KB Output is correct
98 Correct 38 ms 54720 KB Output is correct
99 Correct 23 ms 47316 KB Output is correct
100 Correct 23 ms 47300 KB Output is correct
101 Correct 24 ms 47312 KB Output is correct
102 Correct 24 ms 47312 KB Output is correct
103 Correct 28 ms 47252 KB Output is correct
104 Correct 26 ms 47308 KB Output is correct
105 Correct 24 ms 47316 KB Output is correct
106 Correct 25 ms 47316 KB Output is correct
107 Correct 24 ms 47308 KB Output is correct
108 Correct 25 ms 47296 KB Output is correct
109 Correct 24 ms 47308 KB Output is correct
110 Correct 27 ms 47288 KB Output is correct
111 Correct 93 ms 69948 KB Output is correct
112 Correct 90 ms 66668 KB Output is correct
113 Correct 123 ms 71912 KB Output is correct
114 Correct 109 ms 71284 KB Output is correct
115 Correct 87 ms 70092 KB Output is correct
116 Correct 116 ms 113692 KB Output is correct
117 Correct 106 ms 72528 KB Output is correct
118 Correct 25 ms 47468 KB Output is correct
119 Correct 25 ms 47444 KB Output is correct
120 Correct 25 ms 47540 KB Output is correct
121 Correct 24 ms 47440 KB Output is correct
122 Correct 26 ms 47536 KB Output is correct
123 Correct 25 ms 47504 KB Output is correct
124 Correct 25 ms 47536 KB Output is correct
125 Correct 24 ms 47448 KB Output is correct
126 Correct 24 ms 47412 KB Output is correct
127 Correct 23 ms 47444 KB Output is correct
128 Correct 23 ms 47440 KB Output is correct
129 Correct 26 ms 47564 KB Output is correct
130 Correct 25 ms 47468 KB Output is correct
131 Correct 24 ms 47316 KB Output is correct
132 Correct 35 ms 51284 KB Output is correct
133 Correct 34 ms 50932 KB Output is correct
134 Correct 40 ms 53456 KB Output is correct
135 Correct 39 ms 54560 KB Output is correct
136 Correct 40 ms 54804 KB Output is correct
137 Correct 34 ms 50780 KB Output is correct
138 Correct 33 ms 50380 KB Output is correct
139 Correct 37 ms 57140 KB Output is correct
140 Correct 32 ms 50380 KB Output is correct
141 Correct 37 ms 50960 KB Output is correct
142 Correct 37 ms 51288 KB Output is correct
143 Correct 36 ms 50892 KB Output is correct
144 Correct 41 ms 52256 KB Output is correct
145 Correct 34 ms 50764 KB Output is correct
146 Correct 54 ms 55056 KB Output is correct
147 Correct 41 ms 51832 KB Output is correct
148 Correct 33 ms 50260 KB Output is correct
149 Correct 36 ms 55636 KB Output is correct
150 Correct 38 ms 56828 KB Output is correct
151 Correct 36 ms 54680 KB Output is correct
152 Correct 313 ms 137400 KB Output is correct
153 Correct 316 ms 145484 KB Output is correct
154 Correct 308 ms 133924 KB Output is correct
155 Correct 501 ms 178512 KB Output is correct
156 Correct 317 ms 146632 KB Output is correct
157 Correct 276 ms 116388 KB Output is correct
158 Correct 285 ms 149484 KB Output is correct
159 Correct 414 ms 256584 KB Output is correct
160 Correct 404 ms 241876 KB Output is correct
161 Correct 282 ms 118600 KB Output is correct
162 Correct 259 ms 124164 KB Output is correct