oj.uz

답안 #930628

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
930628 2024-02-20T08:27:51 Z boris_mihov Event Hopping 2 (JOI21_event2) C++17
100 / 100
 124 ms 27324 KB 
#include <algorithm>
#include <iostream>
#include <numeric>
#include <cassert>
#include <cstring>
#include <vector>
#include <queue>
#include <stack>
#include <set>

typedef long long llong;
const int MAXN = 200000 + 10;
const int MAXLOG = 20;
const int INF  = 2e9;

int n, k;
struct Sparse
{
    int sparse[MAXLOG][MAXN];
    void build(int jump[])
    {
        for (int i = 1 ; i <= 2 * n ; ++i)
        {
            sparse[0][i] = jump[i];
        }

        for (int lg = 1 ; (1 << lg) <= 2 * n + 1 ; ++lg)
        {
            for (int idx = 1 ; idx <= 2 * n ; ++idx)
            {
                sparse[lg][idx] = sparse[lg - 1][sparse[lg - 1][idx]];   
            }
        }
    }

    int query(int l ,int r)
    {
        if (l == 0)
        {
            l = 1;
        }

        if (r == 2 * n + 1)
        {
            r = 2 * n;
        }

        int pos = l;
        int cnt = 0;

        for (int lg = MAXLOG - 1 ; lg >= 0 ; --lg)
        {
            if (sparse[lg][pos] != 0 && sparse[lg][pos] <= r)
            {
                cnt += (1 << lg);
                pos = sparse[lg][pos];
            }
        }

        return cnt;
    }
};

int l[MAXN];
int r[MAXN];
int jump[MAXN];
int perm[MAXN];
Sparse sparse;
std::set <std::pair <int,int>> added;

void solve()
{
    std::vector <std::pair <int, std::pair <int,bool>>> v;
    for (int i = 1 ; i <= n ; ++i)
    {
        v.push_back({l[i], {i, false}});
        v.push_back({r[i], {i, true}});
    }
    
    int cnt = 0;
    int last = 0;
    std::sort(v.begin(), v.end());
    for (int i = 0 ; i < 2 * n ; ++i)
    {
        cnt += (v[i].first > last);
        last = v[i].first;
 
        if (v[i].second.second) r[v[i].second.first] = cnt;
        else l[v[i].second.first] = cnt;
    }

    std::fill(jump + 1, jump + 2 * n + 1, 2 * n + 1);
    for (int i = 1 ; i <= n ; ++i)
    {
        jump[l[i]] = std::min(jump[l[i]], r[i]);
    }

    for (int idx = 2 * n - 1 ; idx >= 1 ; --idx)
    {
        jump[idx] = std::min(jump[idx], jump[idx + 1]);
    }

    jump[0] = 1;
    sparse.build(jump);
    if (sparse.query(1, 2 * n) < k)
    {
        std::cout << -1 << '\n';
        return;
    }

    added.insert({0, 0});
    added.insert({2 * n + 1, 2 * n + 1});
    std::vector <int> sol;

    int answer = sparse.query(1, 2 * n);
    for (int i = 1 ; i <= n && sol.size() < k ; ++i)
    {
        auto it = added.lower_bound({l[i], 0});
        if (it->first < r[i])
        {
            continue;
        }

        auto prev = std::prev(it);
        if (prev->second > l[i])
        {
            continue;
        }
        
        int curr = sparse.query(prev->second, l[i]) + sparse.query(r[i], it->first) - sparse.query(prev->second, it->first) + 1;
        if (answer + curr >= k)
        {
            answer += curr;
            sol.push_back(i);
            added.insert({l[i], r[i]});
        }
    }

    for (const int &idx : sol)
    {
        std::cout << idx << '\n';
    }
}

void input()
{
    std::cin >> n >> k;
    for (int i = 1 ; i <= n ; ++i)
    {
        std::cin >> l[i] >> r[i];
    }
}

void fastIOI()
{
    std::ios_base :: sync_with_stdio(0);
    std::cout.tie(nullptr);
    std::cin.tie(nullptr);
}   

int main()
{
    fastIOI();
    input();
    solve();

    return 0;
}

Compilation message

event2.cpp: In function 'void solve()':
event2.cpp:116:43: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  116 |     for (int i = 1 ; i <= n && sol.size() < k ; ++i)
      |                                ~~~~~~~~~~~^~~

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 74 ms 26500 KB Output is correct
5 Correct 72 ms 26920 KB Output is correct
6 Correct 67 ms 26156 KB Output is correct
7 Correct 66 ms 25420 KB Output is correct
8 Correct 75 ms 26732 KB Output is correct
9 Correct 70 ms 26812 KB Output is correct
10 Correct 69 ms 26164 KB Output is correct
11 Correct 69 ms 25528 KB Output is correct
12 Correct 59 ms 25024 KB Output is correct
13 Correct 62 ms 24772 KB Output is correct
14 Correct 58 ms 24188 KB Output is correct
15 Correct 52 ms 24256 KB Output is correct
16 Correct 39 ms 21964 KB Output is correct
17 Correct 43 ms 22468 KB Output is correct
18 Correct 40 ms 21900 KB Output is correct
19 Correct 37 ms 21440 KB Output is correct
20 Correct 34 ms 21576 KB Output is correct
21 Correct 34 ms 21568 KB Output is correct
22 Correct 36 ms 21396 KB Output is correct
23 Correct 36 ms 21444 KB Output is correct
24 Correct 34 ms 21504 KB Output is correct
25 Correct 36 ms 22212 KB Output is correct
26 Correct 36 ms 21700 KB Output is correct
27 Correct 40 ms 21436 KB Output is correct
28 Correct 27 ms 21436 KB Output is correct
29 Correct 28 ms 21384 KB Output is correct
30 Correct 32 ms 21448 KB Output is correct
31 Correct 31 ms 21440 KB Output is correct
32 Correct 36 ms 21440 KB Output is correct
33 Correct 35 ms 21444 KB Output is correct
34 Correct 44 ms 23492 KB Output is correct
35 Correct 41 ms 23096 KB Output is correct
36 Correct 33 ms 21952 KB Output is correct
37 Correct 52 ms 24764 KB Output is correct
38 Correct 51 ms 23996 KB Output is correct
39 Correct 52 ms 24252 KB Output is correct
40 Correct 65 ms 24508 KB Output is correct
41 Correct 49 ms 23740 KB Output is correct
42 Correct 37 ms 21560 KB Output is correct
43 Correct 62 ms 24000 KB Output is correct
44 Correct 60 ms 23996 KB Output is correct
45 Correct 59 ms 23744 KB Output is correct
46 Correct 80 ms 23924 KB Output is correct

Subtask #2
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6488 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 2 ms 8540 KB Output is correct
6 Correct 1 ms 8540 KB Output is correct
7 Correct 1 ms 8540 KB Output is correct
8 Correct 2 ms 8540 KB Output is correct
9 Correct 1 ms 8540 KB Output is correct
10 Correct 1 ms 8668 KB Output is correct
11 Correct 1 ms 8540 KB Output is correct
12 Correct 2 ms 8540 KB Output is correct
13 Correct 1 ms 8540 KB Output is correct
14 Correct 2 ms 8540 KB Output is correct
15 Correct 2 ms 8540 KB Output is correct
16 Correct 1 ms 8536 KB Output is correct
17 Correct 1 ms 8540 KB Output is correct
18 Correct 2 ms 8540 KB Output is correct
19 Correct 1 ms 8536 KB Output is correct
20 Correct 2 ms 8536 KB Output is correct
21 Correct 1 ms 8540 KB Output is correct
22 Correct 2 ms 8540 KB Output is correct
23 Correct 1 ms 8540 KB Output is correct
24 Correct 1 ms 8540 KB Output is correct
25 Correct 1 ms 8540 KB Output is correct
26 Correct 1 ms 8540 KB Output is correct
27 Correct 1 ms 8540 KB Output is correct

Subtask #3
31.0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6488 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 2 ms 8540 KB Output is correct
6 Correct 1 ms 8540 KB Output is correct
7 Correct 1 ms 8540 KB Output is correct
8 Correct 2 ms 8540 KB Output is correct
9 Correct 1 ms 8540 KB Output is correct
10 Correct 1 ms 8668 KB Output is correct
11 Correct 1 ms 8540 KB Output is correct
12 Correct 2 ms 8540 KB Output is correct
13 Correct 1 ms 8540 KB Output is correct
14 Correct 2 ms 8540 KB Output is correct
15 Correct 2 ms 8540 KB Output is correct
16 Correct 1 ms 8536 KB Output is correct
17 Correct 1 ms 8540 KB Output is correct
18 Correct 2 ms 8540 KB Output is correct
19 Correct 1 ms 8536 KB Output is correct
20 Correct 2 ms 8536 KB Output is correct
21 Correct 1 ms 8540 KB Output is correct
22 Correct 2 ms 8540 KB Output is correct
23 Correct 1 ms 8540 KB Output is correct
24 Correct 1 ms 8540 KB Output is correct
25 Correct 1 ms 8540 KB Output is correct
26 Correct 1 ms 8540 KB Output is correct
27 Correct 1 ms 8540 KB Output is correct
28 Correct 3 ms 14940 KB Output is correct
29 Correct 3 ms 14988 KB Output is correct
30 Correct 4 ms 14940 KB Output is correct
31 Correct 3 ms 14980 KB Output is correct
32 Correct 3 ms 14940 KB Output is correct
33 Correct 4 ms 14972 KB Output is correct
34 Correct 4 ms 14940 KB Output is correct
35 Correct 5 ms 15196 KB Output is correct
36 Correct 4 ms 15012 KB Output is correct
37 Correct 4 ms 14940 KB Output is correct
38 Correct 3 ms 14940 KB Output is correct
39 Correct 4 ms 14940 KB Output is correct
40 Correct 4 ms 14940 KB Output is correct
41 Correct 4 ms 14940 KB Output is correct
42 Correct 3 ms 14936 KB Output is correct
43 Correct 4 ms 14940 KB Output is correct
44 Correct 3 ms 14940 KB Output is correct
45 Correct 3 ms 14940 KB Output is correct
46 Correct 3 ms 14940 KB Output is correct
47 Correct 3 ms 14980 KB Output is correct
48 Correct 3 ms 14940 KB Output is correct
49 Correct 4 ms 14940 KB Output is correct
50 Correct 3 ms 14940 KB Output is correct
51 Correct 3 ms 14940 KB Output is correct
52 Correct 3 ms 14940 KB Output is correct
53 Correct 3 ms 14940 KB Output is correct
54 Correct 4 ms 14940 KB Output is correct
55 Correct 4 ms 14940 KB Output is correct
56 Correct 4 ms 14940 KB Output is correct
57 Correct 4 ms 15064 KB Output is correct
58 Correct 4 ms 14940 KB Output is correct
59 Correct 5 ms 14936 KB Output is correct
60 Correct 4 ms 14948 KB Output is correct
61 Correct 4 ms 14940 KB Output is correct
62 Correct 4 ms 14940 KB Output is correct
63 Correct 4 ms 14940 KB Output is correct
64 Correct 3 ms 14940 KB Output is correct

Subtask #4
61.0 / 61.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 74 ms 26500 KB Output is correct
5 Correct 72 ms 26920 KB Output is correct
6 Correct 67 ms 26156 KB Output is correct
7 Correct 66 ms 25420 KB Output is correct
8 Correct 75 ms 26732 KB Output is correct
9 Correct 70 ms 26812 KB Output is correct
10 Correct 69 ms 26164 KB Output is correct
11 Correct 69 ms 25528 KB Output is correct
12 Correct 59 ms 25024 KB Output is correct
13 Correct 62 ms 24772 KB Output is correct
14 Correct 58 ms 24188 KB Output is correct
15 Correct 52 ms 24256 KB Output is correct
16 Correct 39 ms 21964 KB Output is correct
17 Correct 43 ms 22468 KB Output is correct
18 Correct 40 ms 21900 KB Output is correct
19 Correct 37 ms 21440 KB Output is correct
20 Correct 34 ms 21576 KB Output is correct
21 Correct 34 ms 21568 KB Output is correct
22 Correct 36 ms 21396 KB Output is correct
23 Correct 36 ms 21444 KB Output is correct
24 Correct 34 ms 21504 KB Output is correct
25 Correct 36 ms 22212 KB Output is correct
26 Correct 36 ms 21700 KB Output is correct
27 Correct 40 ms 21436 KB Output is correct
28 Correct 27 ms 21436 KB Output is correct
29 Correct 28 ms 21384 KB Output is correct
30 Correct 32 ms 21448 KB Output is correct
31 Correct 31 ms 21440 KB Output is correct
32 Correct 36 ms 21440 KB Output is correct
33 Correct 35 ms 21444 KB Output is correct
34 Correct 44 ms 23492 KB Output is correct
35 Correct 41 ms 23096 KB Output is correct
36 Correct 33 ms 21952 KB Output is correct
37 Correct 52 ms 24764 KB Output is correct
38 Correct 51 ms 23996 KB Output is correct
39 Correct 52 ms 24252 KB Output is correct
40 Correct 65 ms 24508 KB Output is correct
41 Correct 49 ms 23740 KB Output is correct
42 Correct 37 ms 21560 KB Output is correct
43 Correct 62 ms 24000 KB Output is correct
44 Correct 60 ms 23996 KB Output is correct
45 Correct 59 ms 23744 KB Output is correct
46 Correct 80 ms 23924 KB Output is correct
47 Correct 1 ms 6492 KB Output is correct
48 Correct 1 ms 6492 KB Output is correct
49 Correct 1 ms 6488 KB Output is correct
50 Correct 1 ms 8540 KB Output is correct
51 Correct 2 ms 8540 KB Output is correct
52 Correct 1 ms 8540 KB Output is correct
53 Correct 1 ms 8540 KB Output is correct
54 Correct 2 ms 8540 KB Output is correct
55 Correct 1 ms 8540 KB Output is correct
56 Correct 1 ms 8668 KB Output is correct
57 Correct 1 ms 8540 KB Output is correct
58 Correct 2 ms 8540 KB Output is correct
59 Correct 1 ms 8540 KB Output is correct
60 Correct 2 ms 8540 KB Output is correct
61 Correct 2 ms 8540 KB Output is correct
62 Correct 1 ms 8536 KB Output is correct
63 Correct 1 ms 8540 KB Output is correct
64 Correct 2 ms 8540 KB Output is correct
65 Correct 1 ms 8536 KB Output is correct
66 Correct 2 ms 8536 KB Output is correct
67 Correct 1 ms 8540 KB Output is correct
68 Correct 2 ms 8540 KB Output is correct
69 Correct 1 ms 8540 KB Output is correct
70 Correct 1 ms 8540 KB Output is correct
71 Correct 1 ms 8540 KB Output is correct
72 Correct 1 ms 8540 KB Output is correct
73 Correct 1 ms 8540 KB Output is correct
74 Correct 3 ms 14940 KB Output is correct
75 Correct 3 ms 14988 KB Output is correct
76 Correct 4 ms 14940 KB Output is correct
77 Correct 3 ms 14980 KB Output is correct
78 Correct 3 ms 14940 KB Output is correct
79 Correct 4 ms 14972 KB Output is correct
80 Correct 4 ms 14940 KB Output is correct
81 Correct 5 ms 15196 KB Output is correct
82 Correct 4 ms 15012 KB Output is correct
83 Correct 4 ms 14940 KB Output is correct
84 Correct 3 ms 14940 KB Output is correct
85 Correct 4 ms 14940 KB Output is correct
86 Correct 4 ms 14940 KB Output is correct
87 Correct 4 ms 14940 KB Output is correct
88 Correct 3 ms 14936 KB Output is correct
89 Correct 4 ms 14940 KB Output is correct
90 Correct 3 ms 14940 KB Output is correct
91 Correct 3 ms 14940 KB Output is correct
92 Correct 3 ms 14940 KB Output is correct
93 Correct 3 ms 14980 KB Output is correct
94 Correct 3 ms 14940 KB Output is correct
95 Correct 4 ms 14940 KB Output is correct
96 Correct 3 ms 14940 KB Output is correct
97 Correct 3 ms 14940 KB Output is correct
98 Correct 3 ms 14940 KB Output is correct
99 Correct 3 ms 14940 KB Output is correct
100 Correct 4 ms 14940 KB Output is correct
101 Correct 4 ms 14940 KB Output is correct
102 Correct 4 ms 14940 KB Output is correct
103 Correct 4 ms 15064 KB Output is correct
104 Correct 4 ms 14940 KB Output is correct
105 Correct 5 ms 14936 KB Output is correct
106 Correct 4 ms 14948 KB Output is correct
107 Correct 4 ms 14940 KB Output is correct
108 Correct 4 ms 14940 KB Output is correct
109 Correct 4 ms 14940 KB Output is correct
110 Correct 3 ms 14940 KB Output is correct
111 Correct 44 ms 22088 KB Output is correct
112 Correct 42 ms 21452 KB Output is correct
113 Correct 42 ms 21524 KB Output is correct
114 Correct 41 ms 21960 KB Output is correct
115 Correct 48 ms 21780 KB Output is correct
116 Correct 38 ms 21444 KB Output is correct
117 Correct 38 ms 21692 KB Output is correct
118 Correct 124 ms 26668 KB Output is correct
119 Correct 113 ms 26140 KB Output is correct
120 Correct 74 ms 24000 KB Output is correct
121 Correct 36 ms 21444 KB Output is correct
122 Correct 109 ms 24516 KB Output is correct
123 Correct 80 ms 24804 KB Output is correct
124 Correct 76 ms 23940 KB Output is correct
125 Correct 37 ms 21964 KB Output is correct
126 Correct 64 ms 22100 KB Output is correct
127 Correct 56 ms 21880 KB Output is correct
128 Correct 70 ms 21876 KB Output is correct
129 Correct 38 ms 21444 KB Output is correct
130 Correct 53 ms 21580 KB Output is correct
131 Correct 48 ms 21372 KB Output is correct
132 Correct 49 ms 21444 KB Output is correct
133 Correct 38 ms 21440 KB Output is correct
134 Correct 48 ms 21476 KB Output is correct
135 Correct 47 ms 21432 KB Output is correct
136 Correct 44 ms 22212 KB Output is correct
137 Correct 40 ms 21380 KB Output is correct
138 Correct 42 ms 21564 KB Output is correct
139 Correct 44 ms 21444 KB Output is correct
140 Correct 39 ms 21372 KB Output is correct
141 Correct 38 ms 21392 KB Output is correct
142 Correct 74 ms 26932 KB Output is correct
143 Correct 73 ms 27324 KB Output is correct
144 Correct 79 ms 27068 KB Output is correct
145 Correct 66 ms 27064 KB Output is correct
146 Correct 65 ms 27280 KB Output is correct
147 Correct 62 ms 26748 KB Output is correct
148 Correct 60 ms 26776 KB Output is correct
149 Correct 60 ms 26592 KB Output is correct
150 Correct 59 ms 26348 KB Output is correct
151 Correct 60 ms 25788 KB Output is correct
152 Correct 28 ms 21704 KB Output is correct
153 Correct 67 ms 27072 KB Output is correct
154 Correct 65 ms 26736 KB Output is correct
155 Correct 62 ms 26648 KB Output is correct
156 Correct 63 ms 27196 KB Output is correct
157 Correct 61 ms 26552 KB Output is correct
158 Correct 59 ms 26560 KB Output is correct
159 Correct 57 ms 25784 KB Output is correct
160 Correct 27 ms 21964 KB Output is correct
161 Correct 79 ms 24120 KB Output is correct
162 Correct 83 ms 24184 KB Output is correct
163 Correct 72 ms 23992 KB Output is correct
164 Correct 70 ms 23780 KB Output is correct
165 Correct 67 ms 23744 KB Output is correct
166 Correct 40 ms 21544 KB Output is correct
167 Correct 68 ms 24100 KB Output is correct
168 Correct 55 ms 23996 KB Output is correct
169 Correct 59 ms 24280 KB Output is correct
170 Correct 54 ms 23712 KB Output is correct
171 Correct 51 ms 24376 KB Output is correct
172 Correct 61 ms 24176 KB Output is correct
173 Correct 77 ms 25020 KB Output is correct
174 Correct 77 ms 24196 KB Output is correct
175 Correct 76 ms 24196 KB Output is correct
176 Correct 68 ms 24184 KB Output is correct