oj.uz

Submission #386292

# Submission time Handle Problem Language Result Execution time Memory
386292 2021-04-06T09:53:09 Z model_code Event Hopping 2 (JOI21_event2) C++17
100 / 100
 258 ms 28800 KB 
#include <algorithm>
#include <iostream>
#include <set>
#include <vector>
using namespace std;

constexpr int MAX_N = 100'000;
constexpr int MAX_logN = 18;
constexpr int MAX_LR = 1'000'000'000;

int N, K;
int L[MAX_N], R[MAX_N];
vector<int> z;

vector<int> invL[MAX_N * 2 + 1];
int doubling[MAX_N * 2 + 1][MAX_logN];
int count(int l, int r) {
    int res = 0;
    for (int j = MAX_logN - 1; j >= 0; j--) {
        if (doubling[l][j] <= r) {
            l = doubling[l][j];
            res += 1 << j;
        }
    }
    return res;
}

int main() {
    scanf("%d%d", &N, &K);
    for (int i = 0; i < N; i++) {
        scanf("%d%d", L + i, R + i);
        z.push_back(L[i]);
        z.push_back(R[i]);
    }
    sort(z.begin(), z.end());
    z.erase(unique(z.begin(), z.end()), z.end());
    for (int i = 0; i < N; i++) {
        L[i] = lower_bound(z.begin(), z.end(), L[i]) - z.begin();
        R[i] = lower_bound(z.begin(), z.end(), R[i]) - z.begin();
    }

    for (int i = 0; i < N; i++) invL[L[i]].push_back(i);
    int r = z.size();
    for (int i = z.size(); i >= 0; i--) {
        for (int j = 0; j < invL[i].size(); j++) r = min(r, R[invL[i][j]]);
        doubling[i][0] = r;
    }
    for (int i = 1; i < MAX_logN; i++) {
        for (int j = 0; j <= z.size(); j++) {
            doubling[j][i] = doubling[doubling[j][i - 1]][i - 1];
        }
    }

    int now = count(0, z.size() - 1);
    if (now < K) {
        printf("-1\n");
        return 0;
    }
    set<pair<int, int>> used = {{0, 0}, {z.size() - 1, z.size() - 1}};
    for (int i = 0; used.size() - 2 < K; i++) {
        int l = prev(used.lower_bound({R[i], 0}))->second;
        int r = used.lower_bound({R[i], 0})->first;
        if (L[i] < l) continue;
        int tmp = now - count(l, r) + count(l, L[i]) + 1 + count(R[i], r);
        if (tmp >= K) {
            printf("%d\n", i + 1);
            now = tmp;
            used.insert({L[i], R[i]});
        }
    }
}

Compilation message

event2.cpp: In function 'int main()':
event2.cpp:45:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |         for (int j = 0; j < invL[i].size(); j++) r = min(r, R[invL[i][j]]);
      |                         ~~^~~~~~~~~~~~~~~~
event2.cpp:49:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |         for (int j = 0; j <= z.size(); j++) {
      |                         ~~^~~~~~~~~~~
event2.cpp:60:37: warning: comparison of integer expressions of different signedness: 'std::set<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   60 |     for (int i = 0; used.size() - 2 < K; i++) {
      |                     ~~~~~~~~~~~~~~~~^~~
event2.cpp:29:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   29 |     scanf("%d%d", &N, &K);
      |     ~~~~~^~~~~~~~~~~~~~~~
event2.cpp:31:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   31 |         scanf("%d%d", L + i, R + i);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4972 KB Output is correct
2 Correct 4 ms 4972 KB Output is correct
3 Correct 6 ms 5100 KB Output is correct
4 Correct 166 ms 28768 KB Output is correct
5 Correct 159 ms 28512 KB Output is correct
6 Correct 154 ms 28256 KB Output is correct
7 Correct 178 ms 27824 KB Output is correct
8 Correct 161 ms 28768 KB Output is correct
9 Correct 160 ms 28512 KB Output is correct
10 Correct 156 ms 28256 KB Output is correct
11 Correct 164 ms 27744 KB Output is correct
12 Correct 162 ms 26976 KB Output is correct
13 Correct 154 ms 26720 KB Output is correct
14 Correct 150 ms 26592 KB Output is correct
15 Correct 145 ms 26336 KB Output is correct
16 Correct 117 ms 24548 KB Output is correct
17 Correct 116 ms 24484 KB Output is correct
18 Correct 116 ms 24288 KB Output is correct
19 Correct 100 ms 23904 KB Output is correct
20 Correct 121 ms 23904 KB Output is correct
21 Correct 101 ms 23904 KB Output is correct
22 Correct 103 ms 23776 KB Output is correct
23 Correct 98 ms 23776 KB Output is correct
24 Correct 100 ms 23776 KB Output is correct
25 Correct 101 ms 23776 KB Output is correct
26 Correct 105 ms 23776 KB Output is correct
27 Correct 102 ms 23904 KB Output is correct
28 Correct 92 ms 23776 KB Output is correct
29 Correct 98 ms 23776 KB Output is correct
30 Correct 95 ms 23776 KB Output is correct
31 Correct 101 ms 23904 KB Output is correct
32 Correct 100 ms 23904 KB Output is correct
33 Correct 102 ms 23776 KB Output is correct
34 Correct 129 ms 25568 KB Output is correct
35 Correct 118 ms 25056 KB Output is correct
36 Correct 107 ms 24416 KB Output is correct
37 Correct 150 ms 26464 KB Output is correct
38 Correct 138 ms 26336 KB Output is correct
39 Correct 138 ms 26336 KB Output is correct
40 Correct 136 ms 26208 KB Output is correct
41 Correct 132 ms 26080 KB Output is correct
42 Correct 110 ms 23796 KB Output is correct
43 Correct 149 ms 26336 KB Output is correct
44 Correct 152 ms 26208 KB Output is correct
45 Correct 182 ms 26080 KB Output is correct
46 Correct 149 ms 26080 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4972 KB Output is correct
2 Correct 4 ms 4972 KB Output is correct
3 Correct 5 ms 4972 KB Output is correct
4 Correct 4 ms 4972 KB Output is correct
5 Correct 4 ms 4972 KB Output is correct
6 Correct 4 ms 4972 KB Output is correct
7 Correct 4 ms 4972 KB Output is correct
8 Correct 4 ms 4972 KB Output is correct
9 Correct 4 ms 4972 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 4 ms 4972 KB Output is correct
12 Correct 4 ms 4972 KB Output is correct
13 Correct 4 ms 4972 KB Output is correct
14 Correct 4 ms 4972 KB Output is correct
15 Correct 4 ms 4972 KB Output is correct
16 Correct 4 ms 4972 KB Output is correct
17 Correct 4 ms 4972 KB Output is correct
18 Correct 4 ms 4972 KB Output is correct
19 Correct 4 ms 4972 KB Output is correct
20 Correct 4 ms 4972 KB Output is correct
21 Correct 4 ms 4972 KB Output is correct
22 Correct 4 ms 4972 KB Output is correct
23 Correct 4 ms 4972 KB Output is correct
24 Correct 5 ms 4972 KB Output is correct
25 Correct 4 ms 4992 KB Output is correct
26 Correct 4 ms 4972 KB Output is correct
27 Correct 4 ms 4972 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4972 KB Output is correct
2 Correct 4 ms 4972 KB Output is correct
3 Correct 5 ms 4972 KB Output is correct
4 Correct 4 ms 4972 KB Output is correct
5 Correct 4 ms 4972 KB Output is correct
6 Correct 4 ms 4972 KB Output is correct
7 Correct 4 ms 4972 KB Output is correct
8 Correct 4 ms 4972 KB Output is correct
9 Correct 4 ms 4972 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 4 ms 4972 KB Output is correct
12 Correct 4 ms 4972 KB Output is correct
13 Correct 4 ms 4972 KB Output is correct
14 Correct 4 ms 4972 KB Output is correct
15 Correct 4 ms 4972 KB Output is correct
16 Correct 4 ms 4972 KB Output is correct
17 Correct 4 ms 4972 KB Output is correct
18 Correct 4 ms 4972 KB Output is correct
19 Correct 4 ms 4972 KB Output is correct
20 Correct 4 ms 4972 KB Output is correct
21 Correct 4 ms 4972 KB Output is correct
22 Correct 4 ms 4972 KB Output is correct
23 Correct 4 ms 4972 KB Output is correct
24 Correct 5 ms 4972 KB Output is correct
25 Correct 4 ms 4992 KB Output is correct
26 Correct 4 ms 4972 KB Output is correct
27 Correct 4 ms 4972 KB Output is correct
28 Correct 7 ms 5612 KB Output is correct
29 Correct 7 ms 5632 KB Output is correct
30 Correct 7 ms 5612 KB Output is correct
31 Correct 7 ms 5612 KB Output is correct
32 Correct 7 ms 5612 KB Output is correct
33 Correct 7 ms 5612 KB Output is correct
34 Correct 7 ms 5612 KB Output is correct
35 Correct 8 ms 5740 KB Output is correct
36 Correct 9 ms 5740 KB Output is correct
37 Correct 8 ms 5740 KB Output is correct
38 Correct 6 ms 5612 KB Output is correct
39 Correct 10 ms 5740 KB Output is correct
40 Correct 10 ms 5740 KB Output is correct
41 Correct 8 ms 5740 KB Output is correct
42 Correct 7 ms 5612 KB Output is correct
43 Correct 7 ms 5612 KB Output is correct
44 Correct 8 ms 5612 KB Output is correct
45 Correct 7 ms 5612 KB Output is correct
46 Correct 6 ms 5612 KB Output is correct
47 Correct 7 ms 5612 KB Output is correct
48 Correct 8 ms 5616 KB Output is correct
49 Correct 9 ms 5548 KB Output is correct
50 Correct 7 ms 5612 KB Output is correct
51 Correct 7 ms 5612 KB Output is correct
52 Correct 7 ms 5632 KB Output is correct
53 Correct 6 ms 5612 KB Output is correct
54 Correct 6 ms 5612 KB Output is correct
55 Correct 7 ms 5484 KB Output is correct
56 Correct 8 ms 5484 KB Output is correct
57 Correct 8 ms 5484 KB Output is correct
58 Correct 7 ms 5484 KB Output is correct
59 Correct 7 ms 5484 KB Output is correct
60 Correct 7 ms 5484 KB Output is correct
61 Correct 7 ms 5484 KB Output is correct
62 Correct 7 ms 5484 KB Output is correct
63 Correct 7 ms 5484 KB Output is correct
64 Correct 6 ms 5356 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4972 KB Output is correct
2 Correct 4 ms 4972 KB Output is correct
3 Correct 6 ms 5100 KB Output is correct
4 Correct 166 ms 28768 KB Output is correct
5 Correct 159 ms 28512 KB Output is correct
6 Correct 154 ms 28256 KB Output is correct
7 Correct 178 ms 27824 KB Output is correct
8 Correct 161 ms 28768 KB Output is correct
9 Correct 160 ms 28512 KB Output is correct
10 Correct 156 ms 28256 KB Output is correct
11 Correct 164 ms 27744 KB Output is correct
12 Correct 162 ms 26976 KB Output is correct
13 Correct 154 ms 26720 KB Output is correct
14 Correct 150 ms 26592 KB Output is correct
15 Correct 145 ms 26336 KB Output is correct
16 Correct 117 ms 24548 KB Output is correct
17 Correct 116 ms 24484 KB Output is correct
18 Correct 116 ms 24288 KB Output is correct
19 Correct 100 ms 23904 KB Output is correct
20 Correct 121 ms 23904 KB Output is correct
21 Correct 101 ms 23904 KB Output is correct
22 Correct 103 ms 23776 KB Output is correct
23 Correct 98 ms 23776 KB Output is correct
24 Correct 100 ms 23776 KB Output is correct
25 Correct 101 ms 23776 KB Output is correct
26 Correct 105 ms 23776 KB Output is correct
27 Correct 102 ms 23904 KB Output is correct
28 Correct 92 ms 23776 KB Output is correct
29 Correct 98 ms 23776 KB Output is correct
30 Correct 95 ms 23776 KB Output is correct
31 Correct 101 ms 23904 KB Output is correct
32 Correct 100 ms 23904 KB Output is correct
33 Correct 102 ms 23776 KB Output is correct
34 Correct 129 ms 25568 KB Output is correct
35 Correct 118 ms 25056 KB Output is correct
36 Correct 107 ms 24416 KB Output is correct
37 Correct 150 ms 26464 KB Output is correct
38 Correct 138 ms 26336 KB Output is correct
39 Correct 138 ms 26336 KB Output is correct
40 Correct 136 ms 26208 KB Output is correct
41 Correct 132 ms 26080 KB Output is correct
42 Correct 110 ms 23796 KB Output is correct
43 Correct 149 ms 26336 KB Output is correct
44 Correct 152 ms 26208 KB Output is correct
45 Correct 182 ms 26080 KB Output is correct
46 Correct 149 ms 26080 KB Output is correct
47 Correct 4 ms 4972 KB Output is correct
48 Correct 4 ms 4972 KB Output is correct
49 Correct 5 ms 4972 KB Output is correct
50 Correct 4 ms 4972 KB Output is correct
51 Correct 4 ms 4972 KB Output is correct
52 Correct 4 ms 4972 KB Output is correct
53 Correct 4 ms 4972 KB Output is correct
54 Correct 4 ms 4972 KB Output is correct
55 Correct 4 ms 4972 KB Output is correct
56 Correct 4 ms 5100 KB Output is correct
57 Correct 4 ms 4972 KB Output is correct
58 Correct 4 ms 4972 KB Output is correct
59 Correct 4 ms 4972 KB Output is correct
60 Correct 4 ms 4972 KB Output is correct
61 Correct 4 ms 4972 KB Output is correct
62 Correct 4 ms 4972 KB Output is correct
63 Correct 4 ms 4972 KB Output is correct
64 Correct 4 ms 4972 KB Output is correct
65 Correct 4 ms 4972 KB Output is correct
66 Correct 4 ms 4972 KB Output is correct
67 Correct 4 ms 4972 KB Output is correct
68 Correct 4 ms 4972 KB Output is correct
69 Correct 4 ms 4972 KB Output is correct
70 Correct 5 ms 4972 KB Output is correct
71 Correct 4 ms 4992 KB Output is correct
72 Correct 4 ms 4972 KB Output is correct
73 Correct 4 ms 4972 KB Output is correct
74 Correct 7 ms 5612 KB Output is correct
75 Correct 7 ms 5632 KB Output is correct
76 Correct 7 ms 5612 KB Output is correct
77 Correct 7 ms 5612 KB Output is correct
78 Correct 7 ms 5612 KB Output is correct
79 Correct 7 ms 5612 KB Output is correct
80 Correct 7 ms 5612 KB Output is correct
81 Correct 8 ms 5740 KB Output is correct
82 Correct 9 ms 5740 KB Output is correct
83 Correct 8 ms 5740 KB Output is correct
84 Correct 6 ms 5612 KB Output is correct
85 Correct 10 ms 5740 KB Output is correct
86 Correct 10 ms 5740 KB Output is correct
87 Correct 8 ms 5740 KB Output is correct
88 Correct 7 ms 5612 KB Output is correct
89 Correct 7 ms 5612 KB Output is correct
90 Correct 8 ms 5612 KB Output is correct
91 Correct 7 ms 5612 KB Output is correct
92 Correct 6 ms 5612 KB Output is correct
93 Correct 7 ms 5612 KB Output is correct
94 Correct 8 ms 5616 KB Output is correct
95 Correct 9 ms 5548 KB Output is correct
96 Correct 7 ms 5612 KB Output is correct
97 Correct 7 ms 5612 KB Output is correct
98 Correct 7 ms 5632 KB Output is correct
99 Correct 6 ms 5612 KB Output is correct
100 Correct 6 ms 5612 KB Output is correct
101 Correct 7 ms 5484 KB Output is correct
102 Correct 8 ms 5484 KB Output is correct
103 Correct 8 ms 5484 KB Output is correct
104 Correct 7 ms 5484 KB Output is correct
105 Correct 7 ms 5484 KB Output is correct
106 Correct 7 ms 5484 KB Output is correct
107 Correct 7 ms 5484 KB Output is correct
108 Correct 7 ms 5484 KB Output is correct
109 Correct 7 ms 5484 KB Output is correct
110 Correct 6 ms 5356 KB Output is correct
111 Correct 133 ms 23776 KB Output is correct
112 Correct 136 ms 23776 KB Output is correct
113 Correct 140 ms 23776 KB Output is correct
114 Correct 141 ms 23776 KB Output is correct
115 Correct 128 ms 23776 KB Output is correct
116 Correct 126 ms 23776 KB Output is correct
117 Correct 133 ms 23776 KB Output is correct
118 Correct 258 ms 28800 KB Output is correct
119 Correct 225 ms 28220 KB Output is correct
120 Correct 195 ms 26228 KB Output is correct
121 Correct 132 ms 23776 KB Output is correct
122 Correct 210 ms 26868 KB Output is correct
123 Correct 201 ms 26548 KB Output is correct
124 Correct 201 ms 26284 KB Output is correct
125 Correct 130 ms 23776 KB Output is correct
126 Correct 164 ms 24416 KB Output is correct
127 Correct 169 ms 24468 KB Output is correct
128 Correct 160 ms 24288 KB Output is correct
129 Correct 130 ms 23776 KB Output is correct
130 Correct 148 ms 24032 KB Output is correct
131 Correct 142 ms 23904 KB Output is correct
132 Correct 148 ms 23904 KB Output is correct
133 Correct 131 ms 23776 KB Output is correct
134 Correct 140 ms 23796 KB Output is correct
135 Correct 146 ms 23776 KB Output is correct
136 Correct 135 ms 23780 KB Output is correct
137 Correct 126 ms 23872 KB Output is correct
138 Correct 130 ms 23772 KB Output is correct
139 Correct 130 ms 23776 KB Output is correct
140 Correct 126 ms 23904 KB Output is correct
141 Correct 128 ms 23776 KB Output is correct
142 Correct 141 ms 22260 KB Output is correct
143 Correct 142 ms 22112 KB Output is correct
144 Correct 138 ms 22112 KB Output is correct
145 Correct 119 ms 22112 KB Output is correct
146 Correct 120 ms 22116 KB Output is correct
147 Correct 117 ms 21908 KB Output is correct
148 Correct 135 ms 21728 KB Output is correct
149 Correct 114 ms 21784 KB Output is correct
150 Correct 111 ms 21600 KB Output is correct
151 Correct 106 ms 21088 KB Output is correct
152 Correct 61 ms 16824 KB Output is correct
153 Correct 117 ms 22112 KB Output is correct
154 Correct 121 ms 21916 KB Output is correct
155 Correct 129 ms 21856 KB Output is correct
156 Correct 120 ms 21740 KB Output is correct
157 Correct 121 ms 21600 KB Output is correct
158 Correct 119 ms 21600 KB Output is correct
159 Correct 125 ms 21088 KB Output is correct
160 Correct 66 ms 16888 KB Output is correct
161 Correct 185 ms 22900 KB Output is correct
162 Correct 179 ms 22892 KB Output is correct
163 Correct 185 ms 22752 KB Output is correct
164 Correct 188 ms 22644 KB Output is correct
165 Correct 182 ms 22752 KB Output is correct
166 Correct 96 ms 23776 KB Output is correct
167 Correct 141 ms 26336 KB Output is correct
168 Correct 141 ms 26208 KB Output is correct
169 Correct 140 ms 26228 KB Output is correct
170 Correct 138 ms 26080 KB Output is correct
171 Correct 134 ms 26464 KB Output is correct
172 Correct 137 ms 26464 KB Output is correct
173 Correct 172 ms 19424 KB Output is correct
174 Correct 177 ms 19568 KB Output is correct
175 Correct 176 ms 19572 KB Output is correct
176 Correct 151 ms 18912 KB Output is correct