oj.uz

답안 #930624

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
930624 2024-02-20T08:25:38 Z boris_mihov Event Hopping 2 (JOI21_event2) C++17
100 / 100
 112 ms 29536 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 != it->second && it->first < r[i])
        {
            continue;
        }

        auto prev = std::prev(it);
        if (prev->first != prev->second && 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 1 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 83 ms 27240 KB Output is correct
5 Correct 71 ms 28168 KB Output is correct
6 Correct 65 ms 28148 KB Output is correct
7 Correct 65 ms 27492 KB Output is correct
8 Correct 75 ms 28700 KB Output is correct
9 Correct 70 ms 28604 KB Output is correct
10 Correct 67 ms 27980 KB Output is correct
11 Correct 64 ms 28212 KB Output is correct
12 Correct 63 ms 26544 KB Output is correct
13 Correct 57 ms 26412 KB Output is correct
14 Correct 54 ms 26228 KB Output is correct
15 Correct 52 ms 26412 KB Output is correct
16 Correct 40 ms 24008 KB Output is correct
17 Correct 42 ms 24116 KB Output is correct
18 Correct 38 ms 24004 KB Output is correct
19 Correct 34 ms 23488 KB Output is correct
20 Correct 34 ms 23488 KB Output is correct
21 Correct 34 ms 23496 KB Output is correct
22 Correct 35 ms 23308 KB Output is correct
23 Correct 36 ms 23728 KB Output is correct
24 Correct 36 ms 23688 KB Output is correct
25 Correct 36 ms 23368 KB Output is correct
26 Correct 36 ms 23488 KB Output is correct
27 Correct 37 ms 23328 KB Output is correct
28 Correct 27 ms 23488 KB Output is correct
29 Correct 32 ms 23592 KB Output is correct
30 Correct 32 ms 23716 KB Output is correct
31 Correct 31 ms 23488 KB Output is correct
32 Correct 33 ms 23496 KB Output is correct
33 Correct 34 ms 23852 KB Output is correct
34 Correct 46 ms 25536 KB Output is correct
35 Correct 41 ms 24688 KB Output is correct
36 Correct 33 ms 24004 KB Output is correct
37 Correct 57 ms 26060 KB Output is correct
38 Correct 52 ms 26044 KB Output is correct
39 Correct 53 ms 25904 KB Output is correct
40 Correct 52 ms 25648 KB Output is correct
41 Correct 48 ms 25524 KB Output is correct
42 Correct 37 ms 23472 KB Output is correct
43 Correct 66 ms 26064 KB Output is correct
44 Correct 63 ms 26040 KB Output is correct
45 Correct 58 ms 25788 KB Output is correct
46 Correct 66 ms 25788 KB Output is correct

Subtask #2
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 1 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 1 ms 8540 KB Output is correct
9 Correct 1 ms 8540 KB Output is correct
10 Correct 1 ms 8540 KB Output is correct
11 Correct 2 ms 8536 KB Output is correct
12 Correct 1 ms 8540 KB Output is correct
13 Correct 1 ms 8536 KB Output is correct
14 Correct 1 ms 8540 KB Output is correct
15 Correct 1 ms 8540 KB Output is correct
16 Correct 1 ms 8540 KB Output is correct
17 Correct 1 ms 8540 KB Output is correct
18 Correct 1 ms 8540 KB Output is correct
19 Correct 1 ms 8540 KB Output is correct
20 Correct 1 ms 8656 KB Output is correct
21 Correct 1 ms 8540 KB Output is correct
22 Correct 1 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 8668 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 6488 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 1 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 1 ms 8540 KB Output is correct
9 Correct 1 ms 8540 KB Output is correct
10 Correct 1 ms 8540 KB Output is correct
11 Correct 2 ms 8536 KB Output is correct
12 Correct 1 ms 8540 KB Output is correct
13 Correct 1 ms 8536 KB Output is correct
14 Correct 1 ms 8540 KB Output is correct
15 Correct 1 ms 8540 KB Output is correct
16 Correct 1 ms 8540 KB Output is correct
17 Correct 1 ms 8540 KB Output is correct
18 Correct 1 ms 8540 KB Output is correct
19 Correct 1 ms 8540 KB Output is correct
20 Correct 1 ms 8656 KB Output is correct
21 Correct 1 ms 8540 KB Output is correct
22 Correct 1 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 8668 KB Output is correct
27 Correct 1 ms 8540 KB Output is correct
28 Correct 3 ms 14936 KB Output is correct
29 Correct 3 ms 14940 KB Output is correct
30 Correct 3 ms 14872 KB Output is correct
31 Correct 3 ms 14988 KB Output is correct
32 Correct 3 ms 14940 KB Output is correct
33 Correct 3 ms 14940 KB Output is correct
34 Correct 3 ms 14940 KB Output is correct
35 Correct 4 ms 15116 KB Output is correct
36 Correct 4 ms 14936 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 15116 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 14940 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 15076 KB Output is correct
48 Correct 3 ms 14940 KB Output is correct
49 Correct 3 ms 14852 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 14936 KB Output is correct
53 Correct 3 ms 14940 KB Output is correct
54 Correct 3 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 14940 KB Output is correct
58 Correct 4 ms 14936 KB Output is correct
59 Correct 4 ms 14936 KB Output is correct
60 Correct 4 ms 14936 KB Output is correct
61 Correct 4 ms 14936 KB Output is correct
62 Correct 3 ms 14940 KB Output is correct
63 Correct 4 ms 14940 KB Output is correct
64 Correct 3 ms 14868 KB Output is correct

Subtask #4
61.0 / 61.0

# 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 6492 KB Output is correct
4 Correct 83 ms 27240 KB Output is correct
5 Correct 71 ms 28168 KB Output is correct
6 Correct 65 ms 28148 KB Output is correct
7 Correct 65 ms 27492 KB Output is correct
8 Correct 75 ms 28700 KB Output is correct
9 Correct 70 ms 28604 KB Output is correct
10 Correct 67 ms 27980 KB Output is correct
11 Correct 64 ms 28212 KB Output is correct
12 Correct 63 ms 26544 KB Output is correct
13 Correct 57 ms 26412 KB Output is correct
14 Correct 54 ms 26228 KB Output is correct
15 Correct 52 ms 26412 KB Output is correct
16 Correct 40 ms 24008 KB Output is correct
17 Correct 42 ms 24116 KB Output is correct
18 Correct 38 ms 24004 KB Output is correct
19 Correct 34 ms 23488 KB Output is correct
20 Correct 34 ms 23488 KB Output is correct
21 Correct 34 ms 23496 KB Output is correct
22 Correct 35 ms 23308 KB Output is correct
23 Correct 36 ms 23728 KB Output is correct
24 Correct 36 ms 23688 KB Output is correct
25 Correct 36 ms 23368 KB Output is correct
26 Correct 36 ms 23488 KB Output is correct
27 Correct 37 ms 23328 KB Output is correct
28 Correct 27 ms 23488 KB Output is correct
29 Correct 32 ms 23592 KB Output is correct
30 Correct 32 ms 23716 KB Output is correct
31 Correct 31 ms 23488 KB Output is correct
32 Correct 33 ms 23496 KB Output is correct
33 Correct 34 ms 23852 KB Output is correct
34 Correct 46 ms 25536 KB Output is correct
35 Correct 41 ms 24688 KB Output is correct
36 Correct 33 ms 24004 KB Output is correct
37 Correct 57 ms 26060 KB Output is correct
38 Correct 52 ms 26044 KB Output is correct
39 Correct 53 ms 25904 KB Output is correct
40 Correct 52 ms 25648 KB Output is correct
41 Correct 48 ms 25524 KB Output is correct
42 Correct 37 ms 23472 KB Output is correct
43 Correct 66 ms 26064 KB Output is correct
44 Correct 63 ms 26040 KB Output is correct
45 Correct 58 ms 25788 KB Output is correct
46 Correct 66 ms 25788 KB Output is correct
47 Correct 1 ms 6488 KB Output is correct
48 Correct 1 ms 6492 KB Output is correct
49 Correct 1 ms 6492 KB Output is correct
50 Correct 1 ms 8540 KB Output is correct
51 Correct 1 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 1 ms 8540 KB Output is correct
55 Correct 1 ms 8540 KB Output is correct
56 Correct 1 ms 8540 KB Output is correct
57 Correct 2 ms 8536 KB Output is correct
58 Correct 1 ms 8540 KB Output is correct
59 Correct 1 ms 8536 KB Output is correct
60 Correct 1 ms 8540 KB Output is correct
61 Correct 1 ms 8540 KB Output is correct
62 Correct 1 ms 8540 KB Output is correct
63 Correct 1 ms 8540 KB Output is correct
64 Correct 1 ms 8540 KB Output is correct
65 Correct 1 ms 8540 KB Output is correct
66 Correct 1 ms 8656 KB Output is correct
67 Correct 1 ms 8540 KB Output is correct
68 Correct 1 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 8668 KB Output is correct
73 Correct 1 ms 8540 KB Output is correct
74 Correct 3 ms 14936 KB Output is correct
75 Correct 3 ms 14940 KB Output is correct
76 Correct 3 ms 14872 KB Output is correct
77 Correct 3 ms 14988 KB Output is correct
78 Correct 3 ms 14940 KB Output is correct
79 Correct 3 ms 14940 KB Output is correct
80 Correct 3 ms 14940 KB Output is correct
81 Correct 4 ms 15116 KB Output is correct
82 Correct 4 ms 14936 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 15116 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 14940 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 15076 KB Output is correct
94 Correct 3 ms 14940 KB Output is correct
95 Correct 3 ms 14852 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 14936 KB Output is correct
99 Correct 3 ms 14940 KB Output is correct
100 Correct 3 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 14940 KB Output is correct
104 Correct 4 ms 14936 KB Output is correct
105 Correct 4 ms 14936 KB Output is correct
106 Correct 4 ms 14936 KB Output is correct
107 Correct 4 ms 14936 KB Output is correct
108 Correct 3 ms 14940 KB Output is correct
109 Correct 4 ms 14940 KB Output is correct
110 Correct 3 ms 14868 KB Output is correct
111 Correct 43 ms 23484 KB Output is correct
112 Correct 43 ms 23320 KB Output is correct
113 Correct 43 ms 23492 KB Output is correct
114 Correct 41 ms 23488 KB Output is correct
115 Correct 40 ms 23488 KB Output is correct
116 Correct 39 ms 23324 KB Output is correct
117 Correct 47 ms 23848 KB Output is correct
118 Correct 112 ms 28568 KB Output is correct
119 Correct 98 ms 28608 KB Output is correct
120 Correct 73 ms 25784 KB Output is correct
121 Correct 36 ms 23484 KB Output is correct
122 Correct 84 ms 26556 KB Output is correct
123 Correct 79 ms 26816 KB Output is correct
124 Correct 75 ms 26300 KB Output is correct
125 Correct 37 ms 23488 KB Output is correct
126 Correct 65 ms 25116 KB Output is correct
127 Correct 56 ms 23992 KB Output is correct
128 Correct 54 ms 23836 KB Output is correct
129 Correct 38 ms 23452 KB Output is correct
130 Correct 53 ms 23748 KB Output is correct
131 Correct 47 ms 23352 KB Output is correct
132 Correct 46 ms 23496 KB Output is correct
133 Correct 39 ms 23492 KB Output is correct
134 Correct 47 ms 23488 KB Output is correct
135 Correct 43 ms 23492 KB Output is correct
136 Correct 42 ms 23744 KB Output is correct
137 Correct 41 ms 23472 KB Output is correct
138 Correct 43 ms 23468 KB Output is correct
139 Correct 42 ms 23492 KB Output is correct
140 Correct 39 ms 23468 KB Output is correct
141 Correct 39 ms 23492 KB Output is correct
142 Correct 82 ms 29284 KB Output is correct
143 Correct 72 ms 29372 KB Output is correct
144 Correct 75 ms 28968 KB Output is correct
145 Correct 68 ms 29536 KB Output is correct
146 Correct 62 ms 29348 KB Output is correct
147 Correct 70 ms 29392 KB Output is correct
148 Correct 61 ms 29100 KB Output is correct
149 Correct 63 ms 28448 KB Output is correct
150 Correct 59 ms 28368 KB Output is correct
151 Correct 55 ms 27932 KB Output is correct
152 Correct 28 ms 23520 KB Output is correct
153 Correct 65 ms 28944 KB Output is correct
154 Correct 62 ms 28860 KB Output is correct
155 Correct 65 ms 28612 KB Output is correct
156 Correct 61 ms 28768 KB Output is correct
157 Correct 59 ms 28612 KB Output is correct
158 Correct 60 ms 28372 KB Output is correct
159 Correct 55 ms 27704 KB Output is correct
160 Correct 31 ms 23600 KB Output is correct
161 Correct 99 ms 26116 KB Output is correct
162 Correct 72 ms 26560 KB Output is correct
163 Correct 70 ms 25988 KB Output is correct
164 Correct 70 ms 25896 KB Output is correct
165 Correct 74 ms 25608 KB Output is correct
166 Correct 31 ms 23500 KB Output is correct
167 Correct 60 ms 26028 KB Output is correct
168 Correct 56 ms 26240 KB Output is correct
169 Correct 55 ms 26140 KB Output is correct
170 Correct 58 ms 26408 KB Output is correct
171 Correct 55 ms 25672 KB Output is correct
172 Correct 55 ms 26160 KB Output is correct
173 Correct 95 ms 26028 KB Output is correct
174 Correct 76 ms 26304 KB Output is correct
175 Correct 80 ms 26280 KB Output is correct
176 Correct 66 ms 26300 KB Output is correct