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답안 #871934

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
871934 2023-11-11T23:07:41 Z tvladm2009 Event Hopping 2 (JOI21_event2) C++17
100 / 100
 210 ms 37332 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
const int N = (int) 1e5 + 7;
const int K = 20;
pair<int, int> a[N];
int mx[2 * N], l[2 * N], dp[2 * N];
int tab[K][2 * N];
int n, k;

void build() {
  for (int i = 1; i <= 2 * n; i++) {
    tab[0][i] = l[i];
  }
  for (int k = 1; k < K; k++) {
    for (int i = 1; i <= 2 * n; i++) {
      tab[k][i] = tab[k - 1][tab[k - 1][i]];
    }
  }
}

int lift(int a, int x) {
  for (int k = 0; k < K; k++) {
    if (x & (1 << k)) {
      a = tab[k][a];
    }
  }
  return a;
}

bool check(int l, int r, int val) {
  if (val <= 0) {
    return true;
  }
  int nxt = lift(r, val);
  if (nxt != 2 * n && nxt >= l) {
    return true;
  } else {
    return false;
  }
}

int get(int l, int r) {
  return dp[r] - dp[l] - !check(l, r, dp[r] - dp[l]);
}

int main() {
#ifdef ONPC
  freopen("input.txt", "r", stdin);
#else
  ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#endif // ONPC

  cin >> n >> k;
  for (int i = 1; i <= n; i++) {
    cin >> a[i].first >> a[i].second;
  }

  {
    set<int> vals;
    unordered_map<int, int> mp;
    for (int i = 1; i <= n; i++) {
      vals.insert(a[i].first);
      vals.insert(a[i].second);
    }
    int id = 1;
    for (auto it = vals.begin(); it != vals.end(); it++) {
      mp[*it] = id;
      id++;
    }
    for (int i = 1; i <= n; i++) {
      a[i].first = mp[a[i].first];
      a[i].second = mp[a[i].second];
    }
  }

  for (int i = 1; i <= 2 * n; i++) {
    mx[i] = -1;
    l[i] = 2 * n;
  }
  for (int i = 1; i <= n; i++) {
    mx[a[i].second] = max(mx[a[i].second], a[i].first);
  }
  int cur = -1;
  for (int i = 1; i <= 2 * n; i++) {
    cur = max(cur, mx[i]);
    if (cur != -1) {
      l[i] = cur;
    }
  }
  for (int i = 1; i <= 2 * n; i++) {
    if (l[i] == 2 * n) {
      dp[i] = 0;
    } else {
      dp[i] = dp[l[i]] + 1;
    }
  }

  if (dp[2 * n] < k) {
    cout << "-1\n";
    return 0;
  }
  build();
  int maxsum = dp[2 * n];
  set<pair<int, int>> free;
  vector<int> sol;
  free.insert({1, 2 * n});
  for (int i = 1; i <= n; i++) {
    if ((int) sol.size() == k) {
      break;
    }
    int l = a[i].first, r = a[i].second;
    auto it = free.lower_bound({a[i].first + 1, 0});
    if (it == free.begin()) {
      continue;
    }
    it--;
    if (it->second < r) {
      continue;
    }
    int ll = it->first, rr = it->second;
    int before = get(ll, rr);
    int after = get(ll, l) + get(r, rr) + 1;
    if (maxsum + after - before >= k) {
      sol.push_back(i);
      free.erase(it);
      if (l > ll) {
        free.insert({ll, l});
      }
      if (r < rr) {
        free.insert({r, rr});
      }
      maxsum += after - before;
    } else {
      continue;
    }
  }
  for (auto &it : sol) {
    cout << it << "\n";
  }
  return 0;
}

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 18776 KB Output is correct
2 Correct 2 ms 19032 KB Output is correct
3 Correct 3 ms 18780 KB Output is correct
4 Correct 136 ms 35188 KB Output is correct
5 Correct 124 ms 35204 KB Output is correct
6 Correct 126 ms 35252 KB Output is correct
7 Correct 164 ms 35096 KB Output is correct
8 Correct 129 ms 35520 KB Output is correct
9 Correct 126 ms 35248 KB Output is correct
10 Correct 125 ms 35248 KB Output is correct
11 Correct 118 ms 35252 KB Output is correct
12 Correct 110 ms 34992 KB Output is correct
13 Correct 129 ms 35136 KB Output is correct
14 Correct 106 ms 34996 KB Output is correct
15 Correct 110 ms 35092 KB Output is correct
16 Correct 94 ms 34900 KB Output is correct
17 Correct 90 ms 34732 KB Output is correct
18 Correct 89 ms 34752 KB Output is correct
19 Correct 96 ms 35212 KB Output is correct
20 Correct 92 ms 34752 KB Output is correct
21 Correct 94 ms 34688 KB Output is correct
22 Correct 98 ms 34772 KB Output is correct
23 Correct 110 ms 34724 KB Output is correct
24 Correct 91 ms 34776 KB Output is correct
25 Correct 94 ms 34720 KB Output is correct
26 Correct 90 ms 34760 KB Output is correct
27 Correct 88 ms 34752 KB Output is correct
28 Correct 80 ms 21376 KB Output is correct
29 Correct 74 ms 21512 KB Output is correct
30 Correct 77 ms 21452 KB Output is correct
31 Correct 74 ms 21308 KB Output is correct
32 Correct 78 ms 21444 KB Output is correct
33 Correct 94 ms 21580 KB Output is correct
34 Correct 100 ms 35112 KB Output is correct
35 Correct 90 ms 34992 KB Output is correct
36 Correct 90 ms 34756 KB Output is correct
37 Correct 124 ms 35592 KB Output is correct
38 Correct 111 ms 34996 KB Output is correct
39 Correct 111 ms 35036 KB Output is correct
40 Correct 109 ms 34988 KB Output is correct
41 Correct 109 ms 34988 KB Output is correct
42 Correct 78 ms 21444 KB Output is correct
43 Correct 104 ms 34948 KB Output is correct
44 Correct 103 ms 35100 KB Output is correct
45 Correct 108 ms 34928 KB Output is correct
46 Correct 103 ms 35012 KB Output is correct

Subtask #2
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 18776 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 3 ms 19032 KB Output is correct
4 Correct 2 ms 18780 KB Output is correct
5 Correct 2 ms 18780 KB Output is correct
6 Correct 2 ms 18776 KB Output is correct
7 Correct 2 ms 18780 KB Output is correct
8 Correct 2 ms 18780 KB Output is correct
9 Correct 2 ms 18780 KB Output is correct
10 Correct 2 ms 18780 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 2 ms 18780 KB Output is correct
13 Correct 2 ms 18780 KB Output is correct
14 Correct 2 ms 18780 KB Output is correct
15 Correct 1 ms 4444 KB Output is correct
16 Correct 2 ms 18780 KB Output is correct
17 Correct 2 ms 18780 KB Output is correct
18 Correct 2 ms 18780 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 2 ms 18780 KB Output is correct
22 Correct 2 ms 18780 KB Output is correct
23 Correct 2 ms 18780 KB Output is correct
24 Correct 1 ms 4444 KB Output is correct
25 Correct 1 ms 4444 KB Output is correct
26 Correct 2 ms 18780 KB Output is correct
27 Correct 2 ms 18776 KB Output is correct

Subtask #3
31.0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 18776 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 3 ms 19032 KB Output is correct
4 Correct 2 ms 18780 KB Output is correct
5 Correct 2 ms 18780 KB Output is correct
6 Correct 2 ms 18776 KB Output is correct
7 Correct 2 ms 18780 KB Output is correct
8 Correct 2 ms 18780 KB Output is correct
9 Correct 2 ms 18780 KB Output is correct
10 Correct 2 ms 18780 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 2 ms 18780 KB Output is correct
13 Correct 2 ms 18780 KB Output is correct
14 Correct 2 ms 18780 KB Output is correct
15 Correct 1 ms 4444 KB Output is correct
16 Correct 2 ms 18780 KB Output is correct
17 Correct 2 ms 18780 KB Output is correct
18 Correct 2 ms 18780 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 2 ms 18780 KB Output is correct
22 Correct 2 ms 18780 KB Output is correct
23 Correct 2 ms 18780 KB Output is correct
24 Correct 1 ms 4444 KB Output is correct
25 Correct 1 ms 4444 KB Output is correct
26 Correct 2 ms 18780 KB Output is correct
27 Correct 2 ms 18776 KB Output is correct
28 Correct 4 ms 19260 KB Output is correct
29 Correct 4 ms 19388 KB Output is correct
30 Correct 4 ms 19516 KB Output is correct
31 Correct 4 ms 19516 KB Output is correct
32 Correct 4 ms 19516 KB Output is correct
33 Correct 3 ms 4920 KB Output is correct
34 Correct 3 ms 4920 KB Output is correct
35 Correct 6 ms 19516 KB Output is correct
36 Correct 6 ms 19516 KB Output is correct
37 Correct 5 ms 19516 KB Output is correct
38 Correct 3 ms 4924 KB Output is correct
39 Correct 5 ms 19396 KB Output is correct
40 Correct 6 ms 19512 KB Output is correct
41 Correct 5 ms 19516 KB Output is correct
42 Correct 3 ms 4924 KB Output is correct
43 Correct 5 ms 19516 KB Output is correct
44 Correct 5 ms 19516 KB Output is correct
45 Correct 5 ms 19512 KB Output is correct
46 Correct 4 ms 4924 KB Output is correct
47 Correct 5 ms 19384 KB Output is correct
48 Correct 5 ms 19516 KB Output is correct
49 Correct 4 ms 19516 KB Output is correct
50 Correct 3 ms 4924 KB Output is correct
51 Correct 4 ms 19516 KB Output is correct
52 Correct 4 ms 19768 KB Output is correct
53 Correct 5 ms 19516 KB Output is correct
54 Correct 3 ms 4896 KB Output is correct
55 Correct 4 ms 19292 KB Output is correct
56 Correct 4 ms 19280 KB Output is correct
57 Correct 4 ms 19292 KB Output is correct
58 Correct 5 ms 19296 KB Output is correct
59 Correct 4 ms 19288 KB Output is correct
60 Correct 5 ms 19292 KB Output is correct
61 Correct 4 ms 19292 KB Output is correct
62 Correct 4 ms 19292 KB Output is correct
63 Correct 4 ms 19292 KB Output is correct
64 Correct 2 ms 4700 KB Output is correct

Subtask #4
61.0 / 61.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 18776 KB Output is correct
2 Correct 2 ms 19032 KB Output is correct
3 Correct 3 ms 18780 KB Output is correct
4 Correct 136 ms 35188 KB Output is correct
5 Correct 124 ms 35204 KB Output is correct
6 Correct 126 ms 35252 KB Output is correct
7 Correct 164 ms 35096 KB Output is correct
8 Correct 129 ms 35520 KB Output is correct
9 Correct 126 ms 35248 KB Output is correct
10 Correct 125 ms 35248 KB Output is correct
11 Correct 118 ms 35252 KB Output is correct
12 Correct 110 ms 34992 KB Output is correct
13 Correct 129 ms 35136 KB Output is correct
14 Correct 106 ms 34996 KB Output is correct
15 Correct 110 ms 35092 KB Output is correct
16 Correct 94 ms 34900 KB Output is correct
17 Correct 90 ms 34732 KB Output is correct
18 Correct 89 ms 34752 KB Output is correct
19 Correct 96 ms 35212 KB Output is correct
20 Correct 92 ms 34752 KB Output is correct
21 Correct 94 ms 34688 KB Output is correct
22 Correct 98 ms 34772 KB Output is correct
23 Correct 110 ms 34724 KB Output is correct
24 Correct 91 ms 34776 KB Output is correct
25 Correct 94 ms 34720 KB Output is correct
26 Correct 90 ms 34760 KB Output is correct
27 Correct 88 ms 34752 KB Output is correct
28 Correct 80 ms 21376 KB Output is correct
29 Correct 74 ms 21512 KB Output is correct
30 Correct 77 ms 21452 KB Output is correct
31 Correct 74 ms 21308 KB Output is correct
32 Correct 78 ms 21444 KB Output is correct
33 Correct 94 ms 21580 KB Output is correct
34 Correct 100 ms 35112 KB Output is correct
35 Correct 90 ms 34992 KB Output is correct
36 Correct 90 ms 34756 KB Output is correct
37 Correct 124 ms 35592 KB Output is correct
38 Correct 111 ms 34996 KB Output is correct
39 Correct 111 ms 35036 KB Output is correct
40 Correct 109 ms 34988 KB Output is correct
41 Correct 109 ms 34988 KB Output is correct
42 Correct 78 ms 21444 KB Output is correct
43 Correct 104 ms 34948 KB Output is correct
44 Correct 103 ms 35100 KB Output is correct
45 Correct 108 ms 34928 KB Output is correct
46 Correct 103 ms 35012 KB Output is correct
47 Correct 2 ms 18776 KB Output is correct
48 Correct 1 ms 4444 KB Output is correct
49 Correct 3 ms 19032 KB Output is correct
50 Correct 2 ms 18780 KB Output is correct
51 Correct 2 ms 18780 KB Output is correct
52 Correct 2 ms 18776 KB Output is correct
53 Correct 2 ms 18780 KB Output is correct
54 Correct 2 ms 18780 KB Output is correct
55 Correct 2 ms 18780 KB Output is correct
56 Correct 2 ms 18780 KB Output is correct
57 Correct 1 ms 4444 KB Output is correct
58 Correct 2 ms 18780 KB Output is correct
59 Correct 2 ms 18780 KB Output is correct
60 Correct 2 ms 18780 KB Output is correct
61 Correct 1 ms 4444 KB Output is correct
62 Correct 2 ms 18780 KB Output is correct
63 Correct 2 ms 18780 KB Output is correct
64 Correct 2 ms 18780 KB Output is correct
65 Correct 1 ms 4444 KB Output is correct
66 Correct 1 ms 4444 KB Output is correct
67 Correct 2 ms 18780 KB Output is correct
68 Correct 2 ms 18780 KB Output is correct
69 Correct 2 ms 18780 KB Output is correct
70 Correct 1 ms 4444 KB Output is correct
71 Correct 1 ms 4444 KB Output is correct
72 Correct 2 ms 18780 KB Output is correct
73 Correct 2 ms 18776 KB Output is correct
74 Correct 4 ms 19260 KB Output is correct
75 Correct 4 ms 19388 KB Output is correct
76 Correct 4 ms 19516 KB Output is correct
77 Correct 4 ms 19516 KB Output is correct
78 Correct 4 ms 19516 KB Output is correct
79 Correct 3 ms 4920 KB Output is correct
80 Correct 3 ms 4920 KB Output is correct
81 Correct 6 ms 19516 KB Output is correct
82 Correct 6 ms 19516 KB Output is correct
83 Correct 5 ms 19516 KB Output is correct
84 Correct 3 ms 4924 KB Output is correct
85 Correct 5 ms 19396 KB Output is correct
86 Correct 6 ms 19512 KB Output is correct
87 Correct 5 ms 19516 KB Output is correct
88 Correct 3 ms 4924 KB Output is correct
89 Correct 5 ms 19516 KB Output is correct
90 Correct 5 ms 19516 KB Output is correct
91 Correct 5 ms 19512 KB Output is correct
92 Correct 4 ms 4924 KB Output is correct
93 Correct 5 ms 19384 KB Output is correct
94 Correct 5 ms 19516 KB Output is correct
95 Correct 4 ms 19516 KB Output is correct
96 Correct 3 ms 4924 KB Output is correct
97 Correct 4 ms 19516 KB Output is correct
98 Correct 4 ms 19768 KB Output is correct
99 Correct 5 ms 19516 KB Output is correct
100 Correct 3 ms 4896 KB Output is correct
101 Correct 4 ms 19292 KB Output is correct
102 Correct 4 ms 19280 KB Output is correct
103 Correct 4 ms 19292 KB Output is correct
104 Correct 5 ms 19296 KB Output is correct
105 Correct 4 ms 19288 KB Output is correct
106 Correct 5 ms 19292 KB Output is correct
107 Correct 4 ms 19292 KB Output is correct
108 Correct 4 ms 19292 KB Output is correct
109 Correct 4 ms 19292 KB Output is correct
110 Correct 2 ms 4700 KB Output is correct
111 Correct 143 ms 36792 KB Output is correct
112 Correct 141 ms 36800 KB Output is correct
113 Correct 149 ms 36720 KB Output is correct
114 Correct 210 ms 36788 KB Output is correct
115 Correct 158 ms 36700 KB Output is correct
116 Correct 130 ms 23756 KB Output is correct
117 Correct 113 ms 23400 KB Output is correct
118 Correct 175 ms 37328 KB Output is correct
119 Correct 172 ms 37120 KB Output is correct
120 Correct 149 ms 37040 KB Output is correct
121 Correct 123 ms 23456 KB Output is correct
122 Correct 155 ms 37156 KB Output is correct
123 Correct 155 ms 37080 KB Output is correct
124 Correct 164 ms 36876 KB Output is correct
125 Correct 93 ms 23340 KB Output is correct
126 Correct 145 ms 36816 KB Output is correct
127 Correct 132 ms 36800 KB Output is correct
128 Correct 133 ms 36800 KB Output is correct
129 Correct 98 ms 23492 KB Output is correct
130 Correct 131 ms 36800 KB Output is correct
131 Correct 130 ms 36756 KB Output is correct
132 Correct 143 ms 36816 KB Output is correct
133 Correct 122 ms 23488 KB Output is correct
134 Correct 143 ms 36800 KB Output is correct
135 Correct 130 ms 36804 KB Output is correct
136 Correct 128 ms 36824 KB Output is correct
137 Correct 118 ms 23616 KB Output is correct
138 Correct 118 ms 36656 KB Output is correct
139 Correct 125 ms 36688 KB Output is correct
140 Correct 120 ms 36592 KB Output is correct
141 Correct 107 ms 23392 KB Output is correct
142 Correct 85 ms 29376 KB Output is correct
143 Correct 82 ms 29456 KB Output is correct
144 Correct 84 ms 29528 KB Output is correct
145 Correct 93 ms 29684 KB Output is correct
146 Correct 82 ms 29580 KB Output is correct
147 Correct 82 ms 29640 KB Output is correct
148 Correct 83 ms 29524 KB Output is correct
149 Correct 88 ms 29668 KB Output is correct
150 Correct 86 ms 29512 KB Output is correct
151 Correct 78 ms 29324 KB Output is correct
152 Correct 50 ms 14388 KB Output is correct
153 Correct 86 ms 29548 KB Output is correct
154 Correct 84 ms 29444 KB Output is correct
155 Correct 81 ms 29424 KB Output is correct
156 Correct 83 ms 29556 KB Output is correct
157 Correct 84 ms 29824 KB Output is correct
158 Correct 83 ms 29552 KB Output is correct
159 Correct 79 ms 29288 KB Output is correct
160 Correct 54 ms 14464 KB Output is correct
161 Correct 135 ms 33132 KB Output is correct
162 Correct 122 ms 33048 KB Output is correct
163 Correct 123 ms 33060 KB Output is correct
164 Correct 131 ms 33140 KB Output is correct
165 Correct 116 ms 33096 KB Output is correct
166 Correct 71 ms 23496 KB Output is correct
167 Correct 112 ms 37332 KB Output is correct
168 Correct 101 ms 37076 KB Output is correct
169 Correct 106 ms 37296 KB Output is correct
170 Correct 100 ms 37040 KB Output is correct
171 Correct 92 ms 36272 KB Output is correct
172 Correct 98 ms 37044 KB Output is correct
173 Correct 112 ms 29344 KB Output is correct
174 Correct 102 ms 29172 KB Output is correct
175 Correct 101 ms 29244 KB Output is correct
176 Correct 104 ms 29052 KB Output is correct