oj.uz

Submission #444610

# Submission time Handle Problem Language Result Execution time Memory
444610 2021-07-14T11:34:46 Z PeppaPig Event Hopping 2 (JOI21_event2) C++14
100 / 100
 276 ms 31780 KB 
#include <bits/stdc++.h>

#define pii pair<int, int>
#define x first
#define y second

using namespace std;

const int N = 2e5 + 5;

int n, k;
int L[N], R[N], par[N][19];
vector<int> coord, Q[N];

int solve(int l, int r) {
    int ret = 0;
    for(int i = 18; ~i; i--) if(par[l][i] <= r) {
        ret += (1 << i);
        l = par[l][i];
    }
    return ret;
}

int main() {
    scanf("%d %d", &n, &k);
    for(int i = 1; i <= n; i++) {
        scanf("%d %d", L + i, R + i);
        coord.emplace_back(L[i]);
        coord.emplace_back(R[i]);
    }
    sort(coord.begin(), coord.end());
    coord.resize(unique(coord.begin(), coord.end()) - coord.begin());

    for(int i = 1; i <= n; i++) {
        L[i] = lower_bound(coord.begin(), coord.end(), L[i]) - coord.begin();
        R[i] = lower_bound(coord.begin(), coord.end(), R[i]) - coord.begin();
        Q[L[i]].emplace_back(i);
    }

    par[coord.size()][0] = coord.size();
    for(int i = coord.size() - 1; ~i; i--) {
        par[i][0] = par[i + 1][0];
        for(int idx : Q[i])
            par[i][0] = min(par[i][0], R[idx]);
    }

    for(int j = 1; j <= 18; j++)
        for(int i = 0; i <= coord.size(); i++)
            par[i][j] = par[par[i][j - 1]][j - 1];

    int mx_ans = solve(0, coord.size() - 1);

    if(mx_ans < k)
        return !printf("-1\n");

    vector<int> ans;
    set<pii> S = { pii(0, 0), pii(coord.size() - 1, coord.size() - 1) };
    for(int i = 1; i <= n && ans.size() < k; i++) {
        int l = prev(S.lower_bound(pii(R[i], -1e9)))->y;
        int r = S.lower_bound(pii(R[i], -1e9))->x;

        if(L[i] < l || r < R[i])
            continue;

        int now = mx_ans - solve(l, r) + solve(l, L[i]) + 1 + solve(R[i], r);
        if(now >= k) {
            S.emplace(L[i], R[i]);
            ans.emplace_back(i);
            mx_ans = now;
        }
    }

    for(int x : ans) printf("%d\n", x);

    return 0;
}

Compilation message

event2.cpp: In function 'int main()':
event2.cpp:48:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |         for(int i = 0; i <= coord.size(); i++)
      |                        ~~^~~~~~~~~~~~~~~
event2.cpp:58:41: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   58 |     for(int i = 1; i <= n && ans.size() < k; i++) {
      |                              ~~~~~~~~~~~^~~
event2.cpp:25:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |     scanf("%d %d", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~~
event2.cpp:27:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |         scanf("%d %d", L + i, R + i);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 169 ms 29916 KB Output is correct
5 Correct 172 ms 31488 KB Output is correct
6 Correct 155 ms 31236 KB Output is correct
7 Correct 151 ms 30760 KB Output is correct
8 Correct 166 ms 31732 KB Output is correct
9 Correct 160 ms 31496 KB Output is correct
10 Correct 156 ms 31224 KB Output is correct
11 Correct 169 ms 30796 KB Output is correct
12 Correct 158 ms 29748 KB Output is correct
13 Correct 155 ms 29564 KB Output is correct
14 Correct 155 ms 29416 KB Output is correct
15 Correct 147 ms 29056 KB Output is correct
16 Correct 113 ms 27140 KB Output is correct
17 Correct 113 ms 27096 KB Output is correct
18 Correct 115 ms 27016 KB Output is correct
19 Correct 104 ms 26548 KB Output is correct
20 Correct 105 ms 26504 KB Output is correct
21 Correct 102 ms 26516 KB Output is correct
22 Correct 102 ms 26440 KB Output is correct
23 Correct 101 ms 26424 KB Output is correct
24 Correct 106 ms 26548 KB Output is correct
25 Correct 111 ms 26552 KB Output is correct
26 Correct 106 ms 26480 KB Output is correct
27 Correct 106 ms 26440 KB Output is correct
28 Correct 111 ms 26456 KB Output is correct
29 Correct 101 ms 26520 KB Output is correct
30 Correct 100 ms 26480 KB Output is correct
31 Correct 99 ms 26420 KB Output is correct
32 Correct 99 ms 26392 KB Output is correct
33 Correct 114 ms 26424 KB Output is correct
34 Correct 134 ms 28480 KB Output is correct
35 Correct 133 ms 27748 KB Output is correct
36 Correct 109 ms 27176 KB Output is correct
37 Correct 145 ms 29240 KB Output is correct
38 Correct 141 ms 29192 KB Output is correct
39 Correct 137 ms 29044 KB Output is correct
40 Correct 138 ms 28936 KB Output is correct
41 Correct 132 ms 28816 KB Output is correct
42 Correct 110 ms 26516 KB Output is correct
43 Correct 154 ms 29180 KB Output is correct
44 Correct 151 ms 29120 KB Output is correct
45 Correct 157 ms 28940 KB Output is correct
46 Correct 154 ms 28880 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5104 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 4 ms 4940 KB Output is correct
6 Correct 4 ms 4940 KB Output is correct
7 Correct 4 ms 4940 KB Output is correct
8 Correct 3 ms 5004 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 4 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 4 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 5068 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 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 3 ms 4940 KB Output is correct
23 Correct 3 ms 4940 KB Output is correct
24 Correct 4 ms 4940 KB Output is correct
25 Correct 3 ms 4940 KB Output is correct
26 Correct 3 ms 5000 KB Output is correct
27 Correct 4 ms 5008 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5104 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 4 ms 4940 KB Output is correct
6 Correct 4 ms 4940 KB Output is correct
7 Correct 4 ms 4940 KB Output is correct
8 Correct 3 ms 5004 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 4 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 4 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 5068 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 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 3 ms 4940 KB Output is correct
23 Correct 3 ms 4940 KB Output is correct
24 Correct 4 ms 4940 KB Output is correct
25 Correct 3 ms 4940 KB Output is correct
26 Correct 3 ms 5000 KB Output is correct
27 Correct 4 ms 5008 KB Output is correct
28 Correct 6 ms 5580 KB Output is correct
29 Correct 6 ms 5580 KB Output is correct
30 Correct 6 ms 5580 KB Output is correct
31 Correct 6 ms 5580 KB Output is correct
32 Correct 6 ms 5668 KB Output is correct
33 Correct 6 ms 5624 KB Output is correct
34 Correct 6 ms 5660 KB Output is correct
35 Correct 10 ms 5836 KB Output is correct
36 Correct 9 ms 5708 KB Output is correct
37 Correct 8 ms 5732 KB Output is correct
38 Correct 6 ms 5604 KB Output is correct
39 Correct 7 ms 5708 KB Output is correct
40 Correct 8 ms 5784 KB Output is correct
41 Correct 8 ms 5708 KB Output is correct
42 Correct 6 ms 5652 KB Output is correct
43 Correct 7 ms 5708 KB Output is correct
44 Correct 7 ms 5580 KB Output is correct
45 Correct 7 ms 5708 KB Output is correct
46 Correct 6 ms 5660 KB Output is correct
47 Correct 6 ms 5580 KB Output is correct
48 Correct 7 ms 5580 KB Output is correct
49 Correct 6 ms 5604 KB Output is correct
50 Correct 6 ms 5580 KB Output is correct
51 Correct 6 ms 5580 KB Output is correct
52 Correct 6 ms 5600 KB Output is correct
53 Correct 6 ms 5580 KB Output is correct
54 Correct 6 ms 5580 KB Output is correct
55 Correct 7 ms 5580 KB Output is correct
56 Correct 6 ms 5580 KB Output is correct
57 Correct 7 ms 5524 KB Output is correct
58 Correct 6 ms 5580 KB Output is correct
59 Correct 7 ms 5580 KB Output is correct
60 Correct 6 ms 5580 KB Output is correct
61 Correct 7 ms 5580 KB Output is correct
62 Correct 6 ms 5580 KB Output is correct
63 Correct 6 ms 5580 KB Output is correct
64 Correct 5 ms 5324 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 169 ms 29916 KB Output is correct
5 Correct 172 ms 31488 KB Output is correct
6 Correct 155 ms 31236 KB Output is correct
7 Correct 151 ms 30760 KB Output is correct
8 Correct 166 ms 31732 KB Output is correct
9 Correct 160 ms 31496 KB Output is correct
10 Correct 156 ms 31224 KB Output is correct
11 Correct 169 ms 30796 KB Output is correct
12 Correct 158 ms 29748 KB Output is correct
13 Correct 155 ms 29564 KB Output is correct
14 Correct 155 ms 29416 KB Output is correct
15 Correct 147 ms 29056 KB Output is correct
16 Correct 113 ms 27140 KB Output is correct
17 Correct 113 ms 27096 KB Output is correct
18 Correct 115 ms 27016 KB Output is correct
19 Correct 104 ms 26548 KB Output is correct
20 Correct 105 ms 26504 KB Output is correct
21 Correct 102 ms 26516 KB Output is correct
22 Correct 102 ms 26440 KB Output is correct
23 Correct 101 ms 26424 KB Output is correct
24 Correct 106 ms 26548 KB Output is correct
25 Correct 111 ms 26552 KB Output is correct
26 Correct 106 ms 26480 KB Output is correct
27 Correct 106 ms 26440 KB Output is correct
28 Correct 111 ms 26456 KB Output is correct
29 Correct 101 ms 26520 KB Output is correct
30 Correct 100 ms 26480 KB Output is correct
31 Correct 99 ms 26420 KB Output is correct
32 Correct 99 ms 26392 KB Output is correct
33 Correct 114 ms 26424 KB Output is correct
34 Correct 134 ms 28480 KB Output is correct
35 Correct 133 ms 27748 KB Output is correct
36 Correct 109 ms 27176 KB Output is correct
37 Correct 145 ms 29240 KB Output is correct
38 Correct 141 ms 29192 KB Output is correct
39 Correct 137 ms 29044 KB Output is correct
40 Correct 138 ms 28936 KB Output is correct
41 Correct 132 ms 28816 KB Output is correct
42 Correct 110 ms 26516 KB Output is correct
43 Correct 154 ms 29180 KB Output is correct
44 Correct 151 ms 29120 KB Output is correct
45 Correct 157 ms 28940 KB Output is correct
46 Correct 154 ms 28880 KB Output is correct
47 Correct 3 ms 5104 KB Output is correct
48 Correct 3 ms 4940 KB Output is correct
49 Correct 3 ms 4940 KB Output is correct
50 Correct 3 ms 4940 KB Output is correct
51 Correct 4 ms 4940 KB Output is correct
52 Correct 4 ms 4940 KB Output is correct
53 Correct 4 ms 4940 KB Output is correct
54 Correct 3 ms 5004 KB Output is correct
55 Correct 3 ms 4940 KB Output is correct
56 Correct 4 ms 4940 KB Output is correct
57 Correct 3 ms 4940 KB Output is correct
58 Correct 4 ms 4940 KB Output is correct
59 Correct 3 ms 4940 KB Output is correct
60 Correct 3 ms 5068 KB Output is correct
61 Correct 3 ms 4940 KB Output is correct
62 Correct 3 ms 4940 KB Output is correct
63 Correct 3 ms 4940 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 3 ms 4940 KB Output is correct
69 Correct 3 ms 4940 KB Output is correct
70 Correct 4 ms 4940 KB Output is correct
71 Correct 3 ms 4940 KB Output is correct
72 Correct 3 ms 5000 KB Output is correct
73 Correct 4 ms 5008 KB Output is correct
74 Correct 6 ms 5580 KB Output is correct
75 Correct 6 ms 5580 KB Output is correct
76 Correct 6 ms 5580 KB Output is correct
77 Correct 6 ms 5580 KB Output is correct
78 Correct 6 ms 5668 KB Output is correct
79 Correct 6 ms 5624 KB Output is correct
80 Correct 6 ms 5660 KB Output is correct
81 Correct 10 ms 5836 KB Output is correct
82 Correct 9 ms 5708 KB Output is correct
83 Correct 8 ms 5732 KB Output is correct
84 Correct 6 ms 5604 KB Output is correct
85 Correct 7 ms 5708 KB Output is correct
86 Correct 8 ms 5784 KB Output is correct
87 Correct 8 ms 5708 KB Output is correct
88 Correct 6 ms 5652 KB Output is correct
89 Correct 7 ms 5708 KB Output is correct
90 Correct 7 ms 5580 KB Output is correct
91 Correct 7 ms 5708 KB Output is correct
92 Correct 6 ms 5660 KB Output is correct
93 Correct 6 ms 5580 KB Output is correct
94 Correct 7 ms 5580 KB Output is correct
95 Correct 6 ms 5604 KB Output is correct
96 Correct 6 ms 5580 KB Output is correct
97 Correct 6 ms 5580 KB Output is correct
98 Correct 6 ms 5600 KB Output is correct
99 Correct 6 ms 5580 KB Output is correct
100 Correct 6 ms 5580 KB Output is correct
101 Correct 7 ms 5580 KB Output is correct
102 Correct 6 ms 5580 KB Output is correct
103 Correct 7 ms 5524 KB Output is correct
104 Correct 6 ms 5580 KB Output is correct
105 Correct 7 ms 5580 KB Output is correct
106 Correct 6 ms 5580 KB Output is correct
107 Correct 7 ms 5580 KB Output is correct
108 Correct 6 ms 5580 KB Output is correct
109 Correct 6 ms 5580 KB Output is correct
110 Correct 5 ms 5324 KB Output is correct
111 Correct 144 ms 26488 KB Output is correct
112 Correct 149 ms 26516 KB Output is correct
113 Correct 140 ms 26504 KB Output is correct
114 Correct 138 ms 26500 KB Output is correct
115 Correct 148 ms 26424 KB Output is correct
116 Correct 126 ms 26580 KB Output is correct
117 Correct 133 ms 26580 KB Output is correct
118 Correct 276 ms 31780 KB Output is correct
119 Correct 247 ms 31288 KB Output is correct
120 Correct 211 ms 29044 KB Output is correct
121 Correct 142 ms 26420 KB Output is correct
122 Correct 212 ms 29752 KB Output is correct
123 Correct 209 ms 29412 KB Output is correct
124 Correct 203 ms 29036 KB Output is correct
125 Correct 140 ms 26508 KB Output is correct
126 Correct 185 ms 27124 KB Output is correct
127 Correct 177 ms 27140 KB Output is correct
128 Correct 168 ms 27064 KB Output is correct
129 Correct 136 ms 26480 KB Output is correct
130 Correct 156 ms 26556 KB Output is correct
131 Correct 174 ms 26552 KB Output is correct
132 Correct 147 ms 26460 KB Output is correct
133 Correct 137 ms 26424 KB Output is correct
134 Correct 143 ms 26424 KB Output is correct
135 Correct 158 ms 26552 KB Output is correct
136 Correct 142 ms 26504 KB Output is correct
137 Correct 130 ms 26484 KB Output is correct
138 Correct 139 ms 26552 KB Output is correct
139 Correct 137 ms 26564 KB Output is correct
140 Correct 132 ms 26500 KB Output is correct
141 Correct 137 ms 26432 KB Output is correct
142 Correct 135 ms 24684 KB Output is correct
143 Correct 135 ms 24756 KB Output is correct
144 Correct 145 ms 24736 KB Output is correct
145 Correct 116 ms 24760 KB Output is correct
146 Correct 117 ms 24584 KB Output is correct
147 Correct 144 ms 24492 KB Output is correct
148 Correct 117 ms 24400 KB Output is correct
149 Correct 114 ms 24280 KB Output is correct
150 Correct 114 ms 24192 KB Output is correct
151 Correct 109 ms 23616 KB Output is correct
152 Correct 67 ms 19128 KB Output is correct
153 Correct 122 ms 24708 KB Output is correct
154 Correct 118 ms 24756 KB Output is correct
155 Correct 117 ms 24512 KB Output is correct
156 Correct 124 ms 24456 KB Output is correct
157 Correct 147 ms 24260 KB Output is correct
158 Correct 120 ms 24084 KB Output is correct
159 Correct 112 ms 23608 KB Output is correct
160 Correct 71 ms 19104 KB Output is correct
161 Correct 195 ms 25532 KB Output is correct
162 Correct 195 ms 25400 KB Output is correct
163 Correct 185 ms 25400 KB Output is correct
164 Correct 177 ms 25208 KB Output is correct
165 Correct 186 ms 25140 KB Output is correct
166 Correct 100 ms 26396 KB Output is correct
167 Correct 143 ms 29120 KB Output is correct
168 Correct 176 ms 29128 KB Output is correct
169 Correct 139 ms 28980 KB Output is correct
170 Correct 138 ms 28856 KB Output is correct
171 Correct 134 ms 28660 KB Output is correct
172 Correct 169 ms 29360 KB Output is correct
173 Correct 199 ms 21860 KB Output is correct
174 Correct 163 ms 21816 KB Output is correct
175 Correct 167 ms 21800 KB Output is correct
176 Correct 155 ms 21408 KB Output is correct