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답안 #554573

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
554573 2022-04-28T18:50:00 Z MilosMilutinovic Event Hopping 2 (JOI21_event2) C++14
100 / 100
 271 ms 29640 KB 
#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);  
  int n, k;
  cin >> n >> k;
  vector<int> l(n), r(n);
  for (int i = 0; i < n; i++) {
    cin >> l[i] >> r[i];
    --r[i];
  }
  vector<int> xs;
  for (int i = 0; i < n; i++) {
    xs.push_back(l[i]);
    xs.push_back(r[i]);
  }
  sort(xs.begin(), xs.end());
  xs.erase(unique(xs.begin(), xs.end()), xs.end());
  for (int i = 0; i < n; i++) {
    l[i] = lower_bound(xs.begin(), xs.end(), l[i]) - xs.begin();
    r[i] = lower_bound(xs.begin(), xs.end(), r[i]) - xs.begin();
  }                                             
  int sz = xs.size();
  const int LOG = 20;
  vector<vector<int>> nxt(sz, vector<int>(LOG, 1e9));
  for (int i = 0; i < n; i++) {
    nxt[l[i]][0] = min(nxt[l[i]][0], r[i]);
  }
  for (int i = sz - 1; i > 0; i--) {
    nxt[i - 1][0] = min(nxt[i - 1][0], nxt[i][0]);
  }
  for (int j = 1; j < LOG; j++) {
    for (int i = 0; i < sz; i++) {
      if (nxt[i][j - 1] + 1 < sz) {
        nxt[i][j] = nxt[nxt[i][j - 1] + 1][j - 1]; 
      }
    }
  }
  map<int, int> mp;
  mp[0] = sz - 1;
  int cc;
  auto Count = [&](int L, int R) {                  
    int cnt = 0;
    for (int j = LOG - 1; j >= 0; j--) {
      if (L < sz && nxt[L][j] <= R) {
        cnt += (1 << j);
        L = nxt[L][j] + 1;
      }
    }
    return cnt;
  };
  cc = Count(0, sz - 1);     
  function<void(int, int)> Cut = [&](int L, int R) {
    auto it = prev(mp.lower_bound(L + 1));
    cc -= Count(it->first, it->second);
    int xl = it->first;
    int xr = it->second;
    mp.erase(it);
    if (xl != L) {
      cc += Count(xl, L - 1);
      mp[xl] = L - 1;
    }
    if (xr != R) {
      cc += Count(R + 1, xr);
      mp[R + 1] = xr;
    }
  };
  function<void(int, int)> Update = [&](int L, int R) {
    {
      auto it = mp.lower_bound(L);
      if (it != mp.begin() && prev(it)->second == L - 1) {
        cc -= Count(prev(it)->first, prev(it)->second);
        L = prev(it)->first;  
        mp.erase(prev(it));
      }
    }
    {
      auto it = mp.lower_bound(R + 1);
      if (it != mp.end() && it->first == R + 1) {
        cc -= Count(it->first, it->second);
        R = it->second;
        mp.erase(it);
      }
    }
    mp[L] = R;
    cc += Count(L, R);
  };
  auto Check = [&](int L, int R) {
    auto it = mp.lower_bound(L + 1);
    if (it == mp.begin()) {
      return false;
    }
    it = prev(it);
    return it->first <= L && R <= it->second;
  };
  vector<int> ans;
  for (int i = 0; i < n; i++) {
    if (!Check(l[i], r[i])) {
      continue;
    }
    Cut(l[i], r[i]);
    if (cc >= k - ans.size() - 1) {
      ans.push_back(i);
    } else {
      Update(l[i], r[i]);
    }                     
    auto it = mp.begin(); 
    while (it != mp.end()) {
      it = next(it);
    } 
  }
  if (ans.size() < k) {
    cout << -1 << '\n';
  } else {
    for (int i = 0; i < k; i++) {
      cout << ans[i] + 1 << '\n';
    }
  }
  return 0;
}

Compilation message

event2.cpp: In function 'int main()':
event2.cpp:105:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  105 |     if (cc >= k - ans.size() - 1) {
      |         ~~~^~~~~~~~~~~~~~~~~~~~~
event2.cpp:115:18: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  115 |   if (ans.size() < k) {
      |       ~~~~~~~~~~~^~~

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 280 KB Output is correct
4 Correct 156 ms 28712 KB Output is correct
5 Correct 133 ms 28652 KB Output is correct
6 Correct 161 ms 28604 KB Output is correct
7 Correct 153 ms 28476 KB Output is correct
8 Correct 138 ms 28728 KB Output is correct
9 Correct 139 ms 28592 KB Output is correct
10 Correct 164 ms 28532 KB Output is correct
11 Correct 141 ms 28488 KB Output is correct
12 Correct 133 ms 28736 KB Output is correct
13 Correct 144 ms 28660 KB Output is correct
14 Correct 144 ms 28592 KB Output is correct
15 Correct 143 ms 28412 KB Output is correct
16 Correct 125 ms 27720 KB Output is correct
17 Correct 115 ms 27568 KB Output is correct
18 Correct 117 ms 27580 KB Output is correct
19 Correct 102 ms 27392 KB Output is correct
20 Correct 100 ms 27324 KB Output is correct
21 Correct 102 ms 27336 KB Output is correct
22 Correct 97 ms 27208 KB Output is correct
23 Correct 95 ms 27328 KB Output is correct
24 Correct 93 ms 27208 KB Output is correct
25 Correct 116 ms 27232 KB Output is correct
26 Correct 97 ms 27188 KB Output is correct
27 Correct 91 ms 27256 KB Output is correct
28 Correct 160 ms 27304 KB Output is correct
29 Correct 185 ms 27248 KB Output is correct
30 Correct 165 ms 27312 KB Output is correct
31 Correct 136 ms 27312 KB Output is correct
32 Correct 134 ms 27204 KB Output is correct
33 Correct 145 ms 27256 KB Output is correct
34 Correct 149 ms 28200 KB Output is correct
35 Correct 164 ms 27896 KB Output is correct
36 Correct 192 ms 27560 KB Output is correct
37 Correct 115 ms 27976 KB Output is correct
38 Correct 108 ms 28100 KB Output is correct
39 Correct 113 ms 27988 KB Output is correct
40 Correct 119 ms 27964 KB Output is correct
41 Correct 117 ms 27972 KB Output is correct
42 Correct 157 ms 27312 KB Output is correct
43 Correct 146 ms 28020 KB Output is correct
44 Correct 138 ms 28000 KB Output is correct
45 Correct 118 ms 27892 KB Output is correct
46 Correct 131 ms 27972 KB Output is correct

Subtask #2
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 320 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 320 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 320 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 324 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 320 KB Output is correct
20 Correct 1 ms 320 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct

Subtask #3
31.0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 320 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 320 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 320 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 324 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 320 KB Output is correct
20 Correct 1 ms 320 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 4 ms 1108 KB Output is correct
29 Correct 3 ms 1104 KB Output is correct
30 Correct 3 ms 1096 KB Output is correct
31 Correct 3 ms 1044 KB Output is correct
32 Correct 3 ms 1108 KB Output is correct
33 Correct 4 ms 1108 KB Output is correct
34 Correct 4 ms 1100 KB Output is correct
35 Correct 5 ms 1108 KB Output is correct
36 Correct 6 ms 1108 KB Output is correct
37 Correct 5 ms 1108 KB Output is correct
38 Correct 6 ms 1108 KB Output is correct
39 Correct 4 ms 1100 KB Output is correct
40 Correct 4 ms 1108 KB Output is correct
41 Correct 5 ms 1176 KB Output is correct
42 Correct 5 ms 1132 KB Output is correct
43 Correct 4 ms 1108 KB Output is correct
44 Correct 4 ms 1172 KB Output is correct
45 Correct 4 ms 1108 KB Output is correct
46 Correct 5 ms 1108 KB Output is correct
47 Correct 3 ms 1108 KB Output is correct
48 Correct 3 ms 1108 KB Output is correct
49 Correct 3 ms 1108 KB Output is correct
50 Correct 4 ms 1100 KB Output is correct
51 Correct 3 ms 1108 KB Output is correct
52 Correct 3 ms 1100 KB Output is correct
53 Correct 3 ms 1044 KB Output is correct
54 Correct 5 ms 1108 KB Output is correct
55 Correct 3 ms 1108 KB Output is correct
56 Correct 3 ms 1108 KB Output is correct
57 Correct 3 ms 1104 KB Output is correct
58 Correct 3 ms 1108 KB Output is correct
59 Correct 3 ms 1108 KB Output is correct
60 Correct 3 ms 1108 KB Output is correct
61 Correct 3 ms 1108 KB Output is correct
62 Correct 4 ms 1100 KB Output is correct
63 Correct 3 ms 1100 KB Output is correct
64 Correct 4 ms 1096 KB Output is correct

Subtask #4
61.0 / 61.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 280 KB Output is correct
4 Correct 156 ms 28712 KB Output is correct
5 Correct 133 ms 28652 KB Output is correct
6 Correct 161 ms 28604 KB Output is correct
7 Correct 153 ms 28476 KB Output is correct
8 Correct 138 ms 28728 KB Output is correct
9 Correct 139 ms 28592 KB Output is correct
10 Correct 164 ms 28532 KB Output is correct
11 Correct 141 ms 28488 KB Output is correct
12 Correct 133 ms 28736 KB Output is correct
13 Correct 144 ms 28660 KB Output is correct
14 Correct 144 ms 28592 KB Output is correct
15 Correct 143 ms 28412 KB Output is correct
16 Correct 125 ms 27720 KB Output is correct
17 Correct 115 ms 27568 KB Output is correct
18 Correct 117 ms 27580 KB Output is correct
19 Correct 102 ms 27392 KB Output is correct
20 Correct 100 ms 27324 KB Output is correct
21 Correct 102 ms 27336 KB Output is correct
22 Correct 97 ms 27208 KB Output is correct
23 Correct 95 ms 27328 KB Output is correct
24 Correct 93 ms 27208 KB Output is correct
25 Correct 116 ms 27232 KB Output is correct
26 Correct 97 ms 27188 KB Output is correct
27 Correct 91 ms 27256 KB Output is correct
28 Correct 160 ms 27304 KB Output is correct
29 Correct 185 ms 27248 KB Output is correct
30 Correct 165 ms 27312 KB Output is correct
31 Correct 136 ms 27312 KB Output is correct
32 Correct 134 ms 27204 KB Output is correct
33 Correct 145 ms 27256 KB Output is correct
34 Correct 149 ms 28200 KB Output is correct
35 Correct 164 ms 27896 KB Output is correct
36 Correct 192 ms 27560 KB Output is correct
37 Correct 115 ms 27976 KB Output is correct
38 Correct 108 ms 28100 KB Output is correct
39 Correct 113 ms 27988 KB Output is correct
40 Correct 119 ms 27964 KB Output is correct
41 Correct 117 ms 27972 KB Output is correct
42 Correct 157 ms 27312 KB Output is correct
43 Correct 146 ms 28020 KB Output is correct
44 Correct 138 ms 28000 KB Output is correct
45 Correct 118 ms 27892 KB Output is correct
46 Correct 131 ms 27972 KB Output is correct
47 Correct 0 ms 212 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 1 ms 212 KB Output is correct
50 Correct 1 ms 320 KB Output is correct
51 Correct 1 ms 212 KB Output is correct
52 Correct 1 ms 212 KB Output is correct
53 Correct 0 ms 212 KB Output is correct
54 Correct 1 ms 320 KB Output is correct
55 Correct 1 ms 212 KB Output is correct
56 Correct 1 ms 212 KB Output is correct
57 Correct 0 ms 212 KB Output is correct
58 Correct 1 ms 212 KB Output is correct
59 Correct 1 ms 320 KB Output is correct
60 Correct 1 ms 212 KB Output is correct
61 Correct 0 ms 212 KB Output is correct
62 Correct 1 ms 324 KB Output is correct
63 Correct 1 ms 212 KB Output is correct
64 Correct 1 ms 212 KB Output is correct
65 Correct 1 ms 320 KB Output is correct
66 Correct 1 ms 320 KB Output is correct
67 Correct 1 ms 212 KB Output is correct
68 Correct 1 ms 212 KB Output is correct
69 Correct 1 ms 212 KB Output is correct
70 Correct 0 ms 212 KB Output is correct
71 Correct 1 ms 212 KB Output is correct
72 Correct 0 ms 212 KB Output is correct
73 Correct 0 ms 212 KB Output is correct
74 Correct 4 ms 1108 KB Output is correct
75 Correct 3 ms 1104 KB Output is correct
76 Correct 3 ms 1096 KB Output is correct
77 Correct 3 ms 1044 KB Output is correct
78 Correct 3 ms 1108 KB Output is correct
79 Correct 4 ms 1108 KB Output is correct
80 Correct 4 ms 1100 KB Output is correct
81 Correct 5 ms 1108 KB Output is correct
82 Correct 6 ms 1108 KB Output is correct
83 Correct 5 ms 1108 KB Output is correct
84 Correct 6 ms 1108 KB Output is correct
85 Correct 4 ms 1100 KB Output is correct
86 Correct 4 ms 1108 KB Output is correct
87 Correct 5 ms 1176 KB Output is correct
88 Correct 5 ms 1132 KB Output is correct
89 Correct 4 ms 1108 KB Output is correct
90 Correct 4 ms 1172 KB Output is correct
91 Correct 4 ms 1108 KB Output is correct
92 Correct 5 ms 1108 KB Output is correct
93 Correct 3 ms 1108 KB Output is correct
94 Correct 3 ms 1108 KB Output is correct
95 Correct 3 ms 1108 KB Output is correct
96 Correct 4 ms 1100 KB Output is correct
97 Correct 3 ms 1108 KB Output is correct
98 Correct 3 ms 1100 KB Output is correct
99 Correct 3 ms 1044 KB Output is correct
100 Correct 5 ms 1108 KB Output is correct
101 Correct 3 ms 1108 KB Output is correct
102 Correct 3 ms 1108 KB Output is correct
103 Correct 3 ms 1104 KB Output is correct
104 Correct 3 ms 1108 KB Output is correct
105 Correct 3 ms 1108 KB Output is correct
106 Correct 3 ms 1108 KB Output is correct
107 Correct 3 ms 1108 KB Output is correct
108 Correct 4 ms 1100 KB Output is correct
109 Correct 3 ms 1100 KB Output is correct
110 Correct 4 ms 1096 KB Output is correct
111 Correct 114 ms 27204 KB Output is correct
112 Correct 115 ms 27204 KB Output is correct
113 Correct 117 ms 27196 KB Output is correct
114 Correct 116 ms 27308 KB Output is correct
115 Correct 120 ms 27308 KB Output is correct
116 Correct 188 ms 27308 KB Output is correct
117 Correct 190 ms 27252 KB Output is correct
118 Correct 217 ms 29640 KB Output is correct
119 Correct 217 ms 29560 KB Output is correct
120 Correct 204 ms 28920 KB Output is correct
121 Correct 269 ms 27336 KB Output is correct
122 Correct 196 ms 29156 KB Output is correct
123 Correct 191 ms 29076 KB Output is correct
124 Correct 196 ms 28996 KB Output is correct
125 Correct 271 ms 27328 KB Output is correct
126 Correct 170 ms 27716 KB Output is correct
127 Correct 156 ms 27716 KB Output is correct
128 Correct 148 ms 27844 KB Output is correct
129 Correct 237 ms 27200 KB Output is correct
130 Correct 139 ms 27440 KB Output is correct
131 Correct 127 ms 27340 KB Output is correct
132 Correct 126 ms 27380 KB Output is correct
133 Correct 211 ms 27208 KB Output is correct
134 Correct 129 ms 27308 KB Output is correct
135 Correct 120 ms 27252 KB Output is correct
136 Correct 118 ms 27388 KB Output is correct
137 Correct 187 ms 27256 KB Output is correct
138 Correct 112 ms 27396 KB Output is correct
139 Correct 113 ms 27268 KB Output is correct
140 Correct 107 ms 27384 KB Output is correct
141 Correct 171 ms 27256 KB Output is correct
142 Correct 119 ms 28756 KB Output is correct
143 Correct 117 ms 28716 KB Output is correct
144 Correct 124 ms 28720 KB Output is correct
145 Correct 134 ms 28608 KB Output is correct
146 Correct 126 ms 28612 KB Output is correct
147 Correct 130 ms 28612 KB Output is correct
148 Correct 126 ms 28536 KB Output is correct
149 Correct 127 ms 28480 KB Output is correct
150 Correct 132 ms 28568 KB Output is correct
151 Correct 133 ms 28488 KB Output is correct
152 Correct 145 ms 27080 KB Output is correct
153 Correct 127 ms 28776 KB Output is correct
154 Correct 125 ms 28728 KB Output is correct
155 Correct 133 ms 28612 KB Output is correct
156 Correct 159 ms 28620 KB Output is correct
157 Correct 126 ms 28664 KB Output is correct
158 Correct 131 ms 28540 KB Output is correct
159 Correct 129 ms 28472 KB Output is correct
160 Correct 142 ms 27196 KB Output is correct
161 Correct 190 ms 29512 KB Output is correct
162 Correct 192 ms 29420 KB Output is correct
163 Correct 186 ms 29416 KB Output is correct
164 Correct 197 ms 29416 KB Output is correct
165 Correct 201 ms 29236 KB Output is correct
166 Correct 152 ms 27208 KB Output is correct
167 Correct 118 ms 28016 KB Output is correct
168 Correct 113 ms 28004 KB Output is correct
169 Correct 114 ms 27896 KB Output is correct
170 Correct 114 ms 27964 KB Output is correct
171 Correct 115 ms 23624 KB Output is correct
172 Correct 110 ms 24228 KB Output is correct
173 Correct 201 ms 28464 KB Output is correct
174 Correct 193 ms 28428 KB Output is correct
175 Correct 186 ms 28528 KB Output is correct
176 Correct 182 ms 28800 KB Output is correct