oj.uz

답안 #726128

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
726128 2023-04-18T13:59:50 Z piOOE Event Hopping 2 (JOI21_event2) C++17
100 / 100
 140 ms 12268 KB 
#include <bits/stdc++.h>

using namespace std;
using ll = long long;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int n, k;
    cin >> n >> k;

    vector<array<int, 2>> a(n);

    vector<int> yy(2 * n);

    for (int i = 0; i < n; ++i) {
        cin >> a[i][0] >> a[i][1];
        a[i][1] -= 1;
        yy[i * 2] = a[i][0];
        yy[i * 2 + 1] = a[i][1];
    }

    sort(yy.begin(), yy.end());
    yy.resize(unique(yy.begin(), yy.end()) - yy.begin());

    const int m = yy.size();

    for (auto &[l, r] : a) {
        l = lower_bound(yy.begin(), yy.end(), l) - yy.begin();
        r = lower_bound(yy.begin(), yy.end(), r) - yy.begin();
    }

    vector<array<int, 2>> s(n);
    vector<int> inv(n);

    for (int i = 0; i < n; ++i) {
        s[i] = {a[i][1], i};
    }

    sort(s.begin(), s.end());

    for (int i = 0; i < n; ++i) {
        inv[s[i][1]] = i;
    }

    a.push_back({m + 1, m + 1});
    s.push_back({m + 1, n});

    vector<int> par(n + 1, n), depth(n + 1), jump(n + 1, n), dp(m, n);
    for (int i = n - 1; i >= 0; --i) {
        par[i] = par[i + 1];
        if (i + 1 < n) {
            for (int t = s[i][0] + 1; t <= s[i + 1][0]; ++t) {
                par[i] = min(par[i], dp[t]);
            }
        }
        dp[a[s[i][1]][0]] = i;

        depth[i] = depth[par[i]] + 1;
        int p = jump[par[i]], pp = jump[p];
        if (depth[pp] - depth[p] == depth[p] - depth[par[i]]) {
            jump[i] = pp;
        } else {
            jump[i] = par[i];
        }
    }

    auto rangeQuery = [&](int l, int r) {
        l = max(l, 0);
        int ans = depth[l];
        while (l < n && s[l][0] < a[s[r][1]][0]) {
            if (jump[l] < n && s[jump[l]][0] < a[s[r][1]][0]) {
                l = jump[l];
            } else {
                l = par[l];
            }
        }
        ans -= depth[l];
        return ans;
    };

    int best = rangeQuery(0, n);

    if (best < k) {
        cout << "-1\n";
        return 0;
    }

    set<int> alive;

    for (int i = 0; i < n && alive.size() < k; ++i) {
        int p = inv[i];
        auto it = alive.lower_bound(p);
        int r = it == alive.end() ? n : *it;
        int l = it == alive.begin() ? -1 : *prev(it);

        if (r != n && s[p][0] >= a[s[r][1]][0] || l != -1 && s[l][0] >= a[i][0]) {
            continue;
        }

        int now = best - rangeQuery(l, r) + rangeQuery(l, p) + rangeQuery(p, r);
        if (now < k) {
            continue;
        }

        best = now;
        alive.insert(p);

        cout << i + 1 << "\n";
    }

    return 0;
}

Compilation message

event2.cpp: In function 'int main()':
event2.cpp:92:43: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   92 |     for (int i = 0; i < n && alive.size() < k; ++i) {
      |                              ~~~~~~~~~~~~~^~~
event2.cpp:98:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   98 |         if (r != n && s[p][0] >= a[s[r][1]][0] || l != -1 && s[l][0] >= a[i][0]) {

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 93 ms 9920 KB Output is correct
5 Correct 94 ms 11568 KB Output is correct
6 Correct 92 ms 11332 KB Output is correct
7 Correct 85 ms 10820 KB Output is correct
8 Correct 96 ms 11816 KB Output is correct
9 Correct 95 ms 11528 KB Output is correct
10 Correct 91 ms 11428 KB Output is correct
11 Correct 85 ms 10836 KB Output is correct
12 Correct 75 ms 9924 KB Output is correct
13 Correct 75 ms 9900 KB Output is correct
14 Correct 72 ms 9668 KB Output is correct
15 Correct 71 ms 9268 KB Output is correct
16 Correct 53 ms 7620 KB Output is correct
17 Correct 53 ms 7516 KB Output is correct
18 Correct 51 ms 7480 KB Output is correct
19 Correct 52 ms 6984 KB Output is correct
20 Correct 50 ms 6944 KB Output is correct
21 Correct 50 ms 6980 KB Output is correct
22 Correct 53 ms 6968 KB Output is correct
23 Correct 52 ms 6956 KB Output is correct
24 Correct 52 ms 6836 KB Output is correct
25 Correct 56 ms 6952 KB Output is correct
26 Correct 57 ms 6864 KB Output is correct
27 Correct 62 ms 6864 KB Output is correct
28 Correct 44 ms 6828 KB Output is correct
29 Correct 41 ms 6860 KB Output is correct
30 Correct 43 ms 6824 KB Output is correct
31 Correct 46 ms 6828 KB Output is correct
32 Correct 52 ms 6864 KB Output is correct
33 Correct 56 ms 6864 KB Output is correct
34 Correct 62 ms 8676 KB Output is correct
35 Correct 53 ms 8104 KB Output is correct
36 Correct 47 ms 7464 KB Output is correct
37 Correct 73 ms 9528 KB Output is correct
38 Correct 71 ms 9388 KB Output is correct
39 Correct 72 ms 9328 KB Output is correct
40 Correct 68 ms 9260 KB Output is correct
41 Correct 68 ms 9140 KB Output is correct
42 Correct 59 ms 6840 KB Output is correct
43 Correct 90 ms 9388 KB Output is correct
44 Correct 88 ms 9388 KB Output is correct
45 Correct 79 ms 9256 KB Output is correct
46 Correct 83 ms 9160 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 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 324 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 324 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 320 KB Output is correct
15 Correct 1 ms 324 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 316 KB Output is correct
19 Correct 1 ms 320 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 0 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 1 ms 212 KB Output is correct
27 Correct 1 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 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 324 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 324 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 320 KB Output is correct
15 Correct 1 ms 324 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 316 KB Output is correct
19 Correct 1 ms 320 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 0 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 1 ms 212 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 3 ms 464 KB Output is correct
29 Correct 2 ms 468 KB Output is correct
30 Correct 2 ms 468 KB Output is correct
31 Correct 3 ms 468 KB Output is correct
32 Correct 3 ms 468 KB Output is correct
33 Correct 2 ms 468 KB Output is correct
34 Correct 3 ms 468 KB Output is correct
35 Correct 4 ms 576 KB Output is correct
36 Correct 4 ms 556 KB Output is correct
37 Correct 3 ms 596 KB Output is correct
38 Correct 3 ms 464 KB Output is correct
39 Correct 3 ms 596 KB Output is correct
40 Correct 3 ms 596 KB Output is correct
41 Correct 3 ms 596 KB Output is correct
42 Correct 3 ms 468 KB Output is correct
43 Correct 3 ms 468 KB Output is correct
44 Correct 3 ms 460 KB Output is correct
45 Correct 3 ms 468 KB Output is correct
46 Correct 2 ms 468 KB Output is correct
47 Correct 3 ms 516 KB Output is correct
48 Correct 3 ms 460 KB Output is correct
49 Correct 3 ms 468 KB Output is correct
50 Correct 3 ms 468 KB Output is correct
51 Correct 3 ms 468 KB Output is correct
52 Correct 3 ms 468 KB Output is correct
53 Correct 2 ms 468 KB Output is correct
54 Correct 2 ms 456 KB Output is correct
55 Correct 3 ms 588 KB Output is correct
56 Correct 3 ms 596 KB Output is correct
57 Correct 3 ms 596 KB Output is correct
58 Correct 3 ms 596 KB Output is correct
59 Correct 3 ms 596 KB Output is correct
60 Correct 3 ms 596 KB Output is correct
61 Correct 3 ms 552 KB Output is correct
62 Correct 3 ms 596 KB Output is correct
63 Correct 3 ms 596 KB Output is correct
64 Correct 2 ms 468 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 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 93 ms 9920 KB Output is correct
5 Correct 94 ms 11568 KB Output is correct
6 Correct 92 ms 11332 KB Output is correct
7 Correct 85 ms 10820 KB Output is correct
8 Correct 96 ms 11816 KB Output is correct
9 Correct 95 ms 11528 KB Output is correct
10 Correct 91 ms 11428 KB Output is correct
11 Correct 85 ms 10836 KB Output is correct
12 Correct 75 ms 9924 KB Output is correct
13 Correct 75 ms 9900 KB Output is correct
14 Correct 72 ms 9668 KB Output is correct
15 Correct 71 ms 9268 KB Output is correct
16 Correct 53 ms 7620 KB Output is correct
17 Correct 53 ms 7516 KB Output is correct
18 Correct 51 ms 7480 KB Output is correct
19 Correct 52 ms 6984 KB Output is correct
20 Correct 50 ms 6944 KB Output is correct
21 Correct 50 ms 6980 KB Output is correct
22 Correct 53 ms 6968 KB Output is correct
23 Correct 52 ms 6956 KB Output is correct
24 Correct 52 ms 6836 KB Output is correct
25 Correct 56 ms 6952 KB Output is correct
26 Correct 57 ms 6864 KB Output is correct
27 Correct 62 ms 6864 KB Output is correct
28 Correct 44 ms 6828 KB Output is correct
29 Correct 41 ms 6860 KB Output is correct
30 Correct 43 ms 6824 KB Output is correct
31 Correct 46 ms 6828 KB Output is correct
32 Correct 52 ms 6864 KB Output is correct
33 Correct 56 ms 6864 KB Output is correct
34 Correct 62 ms 8676 KB Output is correct
35 Correct 53 ms 8104 KB Output is correct
36 Correct 47 ms 7464 KB Output is correct
37 Correct 73 ms 9528 KB Output is correct
38 Correct 71 ms 9388 KB Output is correct
39 Correct 72 ms 9328 KB Output is correct
40 Correct 68 ms 9260 KB Output is correct
41 Correct 68 ms 9140 KB Output is correct
42 Correct 59 ms 6840 KB Output is correct
43 Correct 90 ms 9388 KB Output is correct
44 Correct 88 ms 9388 KB Output is correct
45 Correct 79 ms 9256 KB Output is correct
46 Correct 83 ms 9160 KB Output is correct
47 Correct 0 ms 212 KB Output is correct
48 Correct 0 ms 212 KB Output is correct
49 Correct 0 ms 212 KB Output is correct
50 Correct 0 ms 212 KB Output is correct
51 Correct 1 ms 212 KB Output is correct
52 Correct 0 ms 324 KB Output is correct
53 Correct 1 ms 212 KB Output is correct
54 Correct 1 ms 212 KB Output is correct
55 Correct 1 ms 212 KB Output is correct
56 Correct 1 ms 324 KB Output is correct
57 Correct 1 ms 212 KB Output is correct
58 Correct 0 ms 212 KB Output is correct
59 Correct 1 ms 212 KB Output is correct
60 Correct 1 ms 320 KB Output is correct
61 Correct 1 ms 324 KB Output is correct
62 Correct 1 ms 212 KB Output is correct
63 Correct 1 ms 212 KB Output is correct
64 Correct 1 ms 316 KB Output is correct
65 Correct 1 ms 320 KB Output is correct
66 Correct 1 ms 212 KB Output is correct
67 Correct 1 ms 212 KB Output is correct
68 Correct 0 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 1 ms 212 KB Output is correct
73 Correct 1 ms 212 KB Output is correct
74 Correct 3 ms 464 KB Output is correct
75 Correct 2 ms 468 KB Output is correct
76 Correct 2 ms 468 KB Output is correct
77 Correct 3 ms 468 KB Output is correct
78 Correct 3 ms 468 KB Output is correct
79 Correct 2 ms 468 KB Output is correct
80 Correct 3 ms 468 KB Output is correct
81 Correct 4 ms 576 KB Output is correct
82 Correct 4 ms 556 KB Output is correct
83 Correct 3 ms 596 KB Output is correct
84 Correct 3 ms 464 KB Output is correct
85 Correct 3 ms 596 KB Output is correct
86 Correct 3 ms 596 KB Output is correct
87 Correct 3 ms 596 KB Output is correct
88 Correct 3 ms 468 KB Output is correct
89 Correct 3 ms 468 KB Output is correct
90 Correct 3 ms 460 KB Output is correct
91 Correct 3 ms 468 KB Output is correct
92 Correct 2 ms 468 KB Output is correct
93 Correct 3 ms 516 KB Output is correct
94 Correct 3 ms 460 KB Output is correct
95 Correct 3 ms 468 KB Output is correct
96 Correct 3 ms 468 KB Output is correct
97 Correct 3 ms 468 KB Output is correct
98 Correct 3 ms 468 KB Output is correct
99 Correct 2 ms 468 KB Output is correct
100 Correct 2 ms 456 KB Output is correct
101 Correct 3 ms 588 KB Output is correct
102 Correct 3 ms 596 KB Output is correct
103 Correct 3 ms 596 KB Output is correct
104 Correct 3 ms 596 KB Output is correct
105 Correct 3 ms 596 KB Output is correct
106 Correct 3 ms 596 KB Output is correct
107 Correct 3 ms 552 KB Output is correct
108 Correct 3 ms 596 KB Output is correct
109 Correct 3 ms 596 KB Output is correct
110 Correct 2 ms 468 KB Output is correct
111 Correct 83 ms 6956 KB Output is correct
112 Correct 84 ms 6972 KB Output is correct
113 Correct 80 ms 6968 KB Output is correct
114 Correct 79 ms 6964 KB Output is correct
115 Correct 79 ms 6948 KB Output is correct
116 Correct 76 ms 6956 KB Output is correct
117 Correct 74 ms 6852 KB Output is correct
118 Correct 140 ms 11824 KB Output is correct
119 Correct 119 ms 11328 KB Output is correct
120 Correct 107 ms 9320 KB Output is correct
121 Correct 69 ms 6852 KB Output is correct
122 Correct 124 ms 9948 KB Output is correct
123 Correct 116 ms 9600 KB Output is correct
124 Correct 105 ms 9324 KB Output is correct
125 Correct 69 ms 6948 KB Output is correct
126 Correct 96 ms 7588 KB Output is correct
127 Correct 100 ms 7468 KB Output is correct
128 Correct 88 ms 7364 KB Output is correct
129 Correct 76 ms 6968 KB Output is correct
130 Correct 91 ms 6968 KB Output is correct
131 Correct 80 ms 7112 KB Output is correct
132 Correct 82 ms 7080 KB Output is correct
133 Correct 72 ms 6964 KB Output is correct
134 Correct 78 ms 6856 KB Output is correct
135 Correct 77 ms 6864 KB Output is correct
136 Correct 85 ms 6960 KB Output is correct
137 Correct 71 ms 6956 KB Output is correct
138 Correct 77 ms 6968 KB Output is correct
139 Correct 78 ms 6872 KB Output is correct
140 Correct 75 ms 6864 KB Output is correct
141 Correct 72 ms 6864 KB Output is correct
142 Correct 103 ms 12268 KB Output is correct
143 Correct 100 ms 12244 KB Output is correct
144 Correct 108 ms 12228 KB Output is correct
145 Correct 99 ms 12128 KB Output is correct
146 Correct 103 ms 12040 KB Output is correct
147 Correct 116 ms 11972 KB Output is correct
148 Correct 100 ms 11944 KB Output is correct
149 Correct 123 ms 11688 KB Output is correct
150 Correct 98 ms 11576 KB Output is correct
151 Correct 90 ms 11084 KB Output is correct
152 Correct 47 ms 6964 KB Output is correct
153 Correct 108 ms 12096 KB Output is correct
154 Correct 114 ms 12076 KB Output is correct
155 Correct 103 ms 12036 KB Output is correct
156 Correct 98 ms 11948 KB Output is correct
157 Correct 103 ms 11692 KB Output is correct
158 Correct 102 ms 11604 KB Output is correct
159 Correct 109 ms 11060 KB Output is correct
160 Correct 43 ms 6824 KB Output is correct
161 Correct 127 ms 9532 KB Output is correct
162 Correct 129 ms 9488 KB Output is correct
163 Correct 109 ms 9292 KB Output is correct
164 Correct 115 ms 9284 KB Output is correct
165 Correct 107 ms 9140 KB Output is correct
166 Correct 57 ms 6856 KB Output is correct
167 Correct 119 ms 9412 KB Output is correct
168 Correct 102 ms 9280 KB Output is correct
169 Correct 113 ms 9168 KB Output is correct
170 Correct 84 ms 9128 KB Output is correct
171 Correct 72 ms 8692 KB Output is correct
172 Correct 93 ms 9388 KB Output is correct
173 Correct 128 ms 9536 KB Output is correct
174 Correct 117 ms 9516 KB Output is correct
175 Correct 139 ms 9528 KB Output is correct
176 Correct 112 ms 9008 KB Output is correct