oj.uz

Submission #414928

# Submission time Handle Problem Language Result Execution time Memory
414928 2021-05-31T10:42:07 Z Pro_ktmr Event Hopping 2 (JOI21_event2) C++17
100 / 100
 268 ms 30620 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 4940 KB Output is correct
2 Correct 4 ms 4940 KB Output is correct
3 Correct 4 ms 4996 KB Output is correct
4 Correct 166 ms 30524 KB Output is correct
5 Correct 162 ms 30460 KB Output is correct
6 Correct 159 ms 30096 KB Output is correct
7 Correct 153 ms 29640 KB Output is correct
8 Correct 164 ms 30596 KB Output is correct
9 Correct 160 ms 30368 KB Output is correct
10 Correct 153 ms 30100 KB Output is correct
11 Correct 150 ms 29620 KB Output is correct
12 Correct 154 ms 28712 KB Output is correct
13 Correct 158 ms 28512 KB Output is correct
14 Correct 146 ms 28408 KB Output is correct
15 Correct 147 ms 28064 KB Output is correct
16 Correct 137 ms 26296 KB Output is correct
17 Correct 130 ms 26252 KB Output is correct
18 Correct 110 ms 26256 KB Output is correct
19 Correct 101 ms 25768 KB Output is correct
20 Correct 97 ms 25724 KB Output is correct
21 Correct 101 ms 25756 KB Output is correct
22 Correct 107 ms 25712 KB Output is correct
23 Correct 101 ms 25716 KB Output is correct
24 Correct 103 ms 25740 KB Output is correct
25 Correct 103 ms 25636 KB Output is correct
26 Correct 103 ms 25652 KB Output is correct
27 Correct 115 ms 25660 KB Output is correct
28 Correct 98 ms 25612 KB Output is correct
29 Correct 96 ms 25608 KB Output is correct
30 Correct 97 ms 25636 KB Output is correct
31 Correct 107 ms 25728 KB Output is correct
32 Correct 96 ms 25776 KB Output is correct
33 Correct 100 ms 25708 KB Output is correct
34 Correct 128 ms 27500 KB Output is correct
35 Correct 114 ms 26808 KB Output is correct
36 Correct 112 ms 26296 KB Output is correct
37 Correct 138 ms 28284 KB Output is correct
38 Correct 135 ms 28196 KB Output is correct
39 Correct 133 ms 28064 KB Output is correct
40 Correct 137 ms 27956 KB Output is correct
41 Correct 132 ms 27808 KB Output is correct
42 Correct 106 ms 25764 KB Output is correct
43 Correct 154 ms 28184 KB Output is correct
44 Correct 149 ms 28140 KB Output is correct
45 Correct 145 ms 27960 KB Output is correct
46 Correct 147 ms 27832 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 4 ms 4940 KB Output is correct
3 Correct 4 ms 4996 KB Output is correct
4 Correct 4 ms 4940 KB Output is correct
5 Correct 6 ms 5004 KB Output is correct
6 Correct 4 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4944 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 4 ms 4940 KB Output is correct
12 Correct 4 ms 4996 KB Output is correct
13 Correct 4 ms 4940 KB Output is correct
14 Correct 4 ms 4940 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 3 ms 5004 KB Output is correct
17 Correct 3 ms 5000 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 3 ms 4940 KB Output is correct
21 Correct 4 ms 4940 KB Output is correct
22 Correct 4 ms 5000 KB Output is correct
23 Correct 4 ms 5000 KB Output is correct
24 Correct 4 ms 4940 KB Output is correct
25 Correct 4 ms 4996 KB Output is correct
26 Correct 3 ms 4940 KB Output is correct
27 Correct 3 ms 4996 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 4 ms 4940 KB Output is correct
3 Correct 4 ms 4996 KB Output is correct
4 Correct 4 ms 4940 KB Output is correct
5 Correct 6 ms 5004 KB Output is correct
6 Correct 4 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4944 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 4 ms 4940 KB Output is correct
12 Correct 4 ms 4996 KB Output is correct
13 Correct 4 ms 4940 KB Output is correct
14 Correct 4 ms 4940 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 3 ms 5004 KB Output is correct
17 Correct 3 ms 5000 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 3 ms 4940 KB Output is correct
21 Correct 4 ms 4940 KB Output is correct
22 Correct 4 ms 5000 KB Output is correct
23 Correct 4 ms 5000 KB Output is correct
24 Correct 4 ms 4940 KB Output is correct
25 Correct 4 ms 4996 KB Output is correct
26 Correct 3 ms 4940 KB Output is correct
27 Correct 3 ms 4996 KB Output is correct
28 Correct 6 ms 5528 KB Output is correct
29 Correct 7 ms 5580 KB Output is correct
30 Correct 6 ms 5580 KB Output is correct
31 Correct 7 ms 5580 KB Output is correct
32 Correct 6 ms 5580 KB Output is correct
33 Correct 6 ms 5592 KB Output is correct
34 Correct 6 ms 5580 KB Output is correct
35 Correct 8 ms 5836 KB Output is correct
36 Correct 8 ms 5708 KB Output is correct
37 Correct 8 ms 5652 KB Output is correct
38 Correct 6 ms 5580 KB Output is correct
39 Correct 8 ms 5708 KB Output is correct
40 Correct 8 ms 5708 KB Output is correct
41 Correct 8 ms 5708 KB Output is correct
42 Correct 6 ms 5580 KB Output is correct
43 Correct 7 ms 5648 KB Output is correct
44 Correct 8 ms 5648 KB Output is correct
45 Correct 7 ms 5580 KB Output is correct
46 Correct 6 ms 5580 KB Output is correct
47 Correct 7 ms 5524 KB Output is correct
48 Correct 7 ms 5580 KB Output is correct
49 Correct 7 ms 5580 KB Output is correct
50 Correct 7 ms 5656 KB Output is correct
51 Correct 6 ms 5580 KB Output is correct
52 Correct 6 ms 5580 KB Output is correct
53 Correct 6 ms 5592 KB Output is correct
54 Correct 7 ms 5672 KB Output is correct
55 Correct 7 ms 5452 KB Output is correct
56 Correct 7 ms 5588 KB Output is correct
57 Correct 7 ms 5580 KB Output is correct
58 Correct 7 ms 5452 KB Output is correct
59 Correct 8 ms 5524 KB Output is correct
60 Correct 7 ms 5452 KB Output is correct
61 Correct 7 ms 5452 KB Output is correct
62 Correct 7 ms 5524 KB Output is correct
63 Correct 7 ms 5520 KB Output is correct
64 Correct 6 ms 5392 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 4 ms 4940 KB Output is correct
3 Correct 4 ms 4996 KB Output is correct
4 Correct 166 ms 30524 KB Output is correct
5 Correct 162 ms 30460 KB Output is correct
6 Correct 159 ms 30096 KB Output is correct
7 Correct 153 ms 29640 KB Output is correct
8 Correct 164 ms 30596 KB Output is correct
9 Correct 160 ms 30368 KB Output is correct
10 Correct 153 ms 30100 KB Output is correct
11 Correct 150 ms 29620 KB Output is correct
12 Correct 154 ms 28712 KB Output is correct
13 Correct 158 ms 28512 KB Output is correct
14 Correct 146 ms 28408 KB Output is correct
15 Correct 147 ms 28064 KB Output is correct
16 Correct 137 ms 26296 KB Output is correct
17 Correct 130 ms 26252 KB Output is correct
18 Correct 110 ms 26256 KB Output is correct
19 Correct 101 ms 25768 KB Output is correct
20 Correct 97 ms 25724 KB Output is correct
21 Correct 101 ms 25756 KB Output is correct
22 Correct 107 ms 25712 KB Output is correct
23 Correct 101 ms 25716 KB Output is correct
24 Correct 103 ms 25740 KB Output is correct
25 Correct 103 ms 25636 KB Output is correct
26 Correct 103 ms 25652 KB Output is correct
27 Correct 115 ms 25660 KB Output is correct
28 Correct 98 ms 25612 KB Output is correct
29 Correct 96 ms 25608 KB Output is correct
30 Correct 97 ms 25636 KB Output is correct
31 Correct 107 ms 25728 KB Output is correct
32 Correct 96 ms 25776 KB Output is correct
33 Correct 100 ms 25708 KB Output is correct
34 Correct 128 ms 27500 KB Output is correct
35 Correct 114 ms 26808 KB Output is correct
36 Correct 112 ms 26296 KB Output is correct
37 Correct 138 ms 28284 KB Output is correct
38 Correct 135 ms 28196 KB Output is correct
39 Correct 133 ms 28064 KB Output is correct
40 Correct 137 ms 27956 KB Output is correct
41 Correct 132 ms 27808 KB Output is correct
42 Correct 106 ms 25764 KB Output is correct
43 Correct 154 ms 28184 KB Output is correct
44 Correct 149 ms 28140 KB Output is correct
45 Correct 145 ms 27960 KB Output is correct
46 Correct 147 ms 27832 KB Output is correct
47 Correct 4 ms 4940 KB Output is correct
48 Correct 4 ms 4940 KB Output is correct
49 Correct 4 ms 4996 KB Output is correct
50 Correct 4 ms 4940 KB Output is correct
51 Correct 6 ms 5004 KB Output is correct
52 Correct 4 ms 4940 KB Output is correct
53 Correct 3 ms 4940 KB Output is correct
54 Correct 3 ms 4944 KB Output is correct
55 Correct 3 ms 4940 KB Output is correct
56 Correct 4 ms 4992 KB Output is correct
57 Correct 4 ms 4940 KB Output is correct
58 Correct 4 ms 4996 KB Output is correct
59 Correct 4 ms 4940 KB Output is correct
60 Correct 4 ms 4940 KB Output is correct
61 Correct 4 ms 4940 KB Output is correct
62 Correct 3 ms 5004 KB Output is correct
63 Correct 3 ms 5000 KB Output is correct
64 Correct 3 ms 4940 KB Output is correct
65 Correct 3 ms 4940 KB Output is correct
66 Correct 3 ms 4940 KB Output is correct
67 Correct 4 ms 4940 KB Output is correct
68 Correct 4 ms 5000 KB Output is correct
69 Correct 4 ms 5000 KB Output is correct
70 Correct 4 ms 4940 KB Output is correct
71 Correct 4 ms 4996 KB Output is correct
72 Correct 3 ms 4940 KB Output is correct
73 Correct 3 ms 4996 KB Output is correct
74 Correct 6 ms 5528 KB Output is correct
75 Correct 7 ms 5580 KB Output is correct
76 Correct 6 ms 5580 KB Output is correct
77 Correct 7 ms 5580 KB Output is correct
78 Correct 6 ms 5580 KB Output is correct
79 Correct 6 ms 5592 KB Output is correct
80 Correct 6 ms 5580 KB Output is correct
81 Correct 8 ms 5836 KB Output is correct
82 Correct 8 ms 5708 KB Output is correct
83 Correct 8 ms 5652 KB Output is correct
84 Correct 6 ms 5580 KB Output is correct
85 Correct 8 ms 5708 KB Output is correct
86 Correct 8 ms 5708 KB Output is correct
87 Correct 8 ms 5708 KB Output is correct
88 Correct 6 ms 5580 KB Output is correct
89 Correct 7 ms 5648 KB Output is correct
90 Correct 8 ms 5648 KB Output is correct
91 Correct 7 ms 5580 KB Output is correct
92 Correct 6 ms 5580 KB Output is correct
93 Correct 7 ms 5524 KB Output is correct
94 Correct 7 ms 5580 KB Output is correct
95 Correct 7 ms 5580 KB Output is correct
96 Correct 7 ms 5656 KB Output is correct
97 Correct 6 ms 5580 KB Output is correct
98 Correct 6 ms 5580 KB Output is correct
99 Correct 6 ms 5592 KB Output is correct
100 Correct 7 ms 5672 KB Output is correct
101 Correct 7 ms 5452 KB Output is correct
102 Correct 7 ms 5588 KB Output is correct
103 Correct 7 ms 5580 KB Output is correct
104 Correct 7 ms 5452 KB Output is correct
105 Correct 8 ms 5524 KB Output is correct
106 Correct 7 ms 5452 KB Output is correct
107 Correct 7 ms 5452 KB Output is correct
108 Correct 7 ms 5524 KB Output is correct
109 Correct 7 ms 5520 KB Output is correct
110 Correct 6 ms 5392 KB Output is correct
111 Correct 141 ms 25780 KB Output is correct
112 Correct 138 ms 25628 KB Output is correct
113 Correct 137 ms 25632 KB Output is correct
114 Correct 136 ms 25692 KB Output is correct
115 Correct 134 ms 25636 KB Output is correct
116 Correct 127 ms 25652 KB Output is correct
117 Correct 128 ms 25704 KB Output is correct
118 Correct 268 ms 30620 KB Output is correct
119 Correct 228 ms 30004 KB Output is correct
120 Correct 223 ms 28064 KB Output is correct
121 Correct 137 ms 25840 KB Output is correct
122 Correct 212 ms 28676 KB Output is correct
123 Correct 202 ms 28372 KB Output is correct
124 Correct 194 ms 28028 KB Output is correct
125 Correct 153 ms 25668 KB Output is correct
126 Correct 188 ms 26280 KB Output is correct
127 Correct 169 ms 26304 KB Output is correct
128 Correct 164 ms 26208 KB Output is correct
129 Correct 130 ms 25652 KB Output is correct
130 Correct 151 ms 25848 KB Output is correct
131 Correct 146 ms 25756 KB Output is correct
132 Correct 147 ms 25788 KB Output is correct
133 Correct 128 ms 25652 KB Output is correct
134 Correct 139 ms 25716 KB Output is correct
135 Correct 142 ms 25652 KB Output is correct
136 Correct 137 ms 25652 KB Output is correct
137 Correct 125 ms 25648 KB Output is correct
138 Correct 132 ms 25588 KB Output is correct
139 Correct 132 ms 25620 KB Output is correct
140 Correct 129 ms 25648 KB Output is correct
141 Correct 126 ms 25628 KB Output is correct
142 Correct 137 ms 23996 KB Output is correct
143 Correct 139 ms 23856 KB Output is correct
144 Correct 133 ms 23864 KB Output is correct
145 Correct 118 ms 23968 KB Output is correct
146 Correct 115 ms 23848 KB Output is correct
147 Correct 113 ms 23736 KB Output is correct
148 Correct 112 ms 23640 KB Output is correct
149 Correct 114 ms 23480 KB Output is correct
150 Correct 111 ms 23396 KB Output is correct
151 Correct 118 ms 22940 KB Output is correct
152 Correct 61 ms 18676 KB Output is correct
153 Correct 118 ms 23912 KB Output is correct
154 Correct 116 ms 23796 KB Output is correct
155 Correct 115 ms 23780 KB Output is correct
156 Correct 113 ms 23612 KB Output is correct
157 Correct 112 ms 23480 KB Output is correct
158 Correct 115 ms 23336 KB Output is correct
159 Correct 111 ms 22968 KB Output is correct
160 Correct 62 ms 18612 KB Output is correct
161 Correct 186 ms 24812 KB Output is correct
162 Correct 172 ms 24636 KB Output is correct
163 Correct 171 ms 24636 KB Output is correct
164 Correct 167 ms 24400 KB Output is correct
165 Correct 161 ms 24292 KB Output is correct
166 Correct 97 ms 25792 KB Output is correct
167 Correct 138 ms 28128 KB Output is correct
168 Correct 149 ms 28088 KB Output is correct
169 Correct 150 ms 27976 KB Output is correct
170 Correct 137 ms 27936 KB Output is correct
171 Correct 133 ms 27628 KB Output is correct
172 Correct 143 ms 28296 KB Output is correct
173 Correct 167 ms 21352 KB Output is correct
174 Correct 164 ms 21316 KB Output is correct
175 Correct 160 ms 21216 KB Output is correct
176 Correct 150 ms 20792 KB Output is correct