oj.uz

Submission #722564

# Submission time Handle Problem Language Result Execution time Memory
722564 2023-04-12T10:05:20 Z Itamar Event Hopping (BOI22_events) C++14
100 / 100
 364 ms 29252 KB 
#include <iostream>
using namespace std;
#include <vector>
#include <set>
#define pi pair<int,int>
#define vi vector<int>
#include <queue>
#include <algorithm>
#define ll long long

const int siz = 1e5;
int lii[siz];
int rii[siz];
int bin[siz][20];
int in[siz];
struct node {
    int l, r, mid;
    pi maxi;
    node* sl, * sr;
    node(int li, int ri) {
        l = li, r = ri, mid = (l + r) / 2;
        if (l < r) {
            sl = new node(l, mid);
            sr = new node(mid + 1, r);
            maxi = max(sl->maxi, sr->maxi);
        }
        else {
            maxi = { rii[l],l };
        }
    }
    pi query(int a, int b) {
        if (a > r || b < l)return { 0,0 };
        if (l >= a && r <= b)return maxi;
        return max(sl->query(a, b), sr->query(a, b));
    }
};
int main()
{
    int n, q;
    cin >> n >> q;
    vector<vi> vec;
    vi v1, v2;
    for (int i = 0; i < n; i++) {
        int s, e;
        cin >> s >> e;
        vec.push_back({ e,s,i });//

    }
    sort(vec.begin(), vec.end());
    for (vi p : vec) {
        v1.push_back(p[0]); v2.push_back(p[1]);
    }
    for (int i = 0; i < n; i++) {
        lii[i] = lower_bound(v1.begin(), v1.end(), v2[i]) - v1.begin();
        in[vec[i][2]] = i;
    }
    for (int i = 0; i < n; i++) {
        rii[n - 1 - i] = n - 1 - (lii[i]);
        in[i] = n - 1 - in[i];
    }
    node* seg = new node(0, n - 1);
    for (int i = 0; i < n; i++) {
        bin[i][0] = seg->query(i, rii[i]).second;
    }
    for (int i = 1; i < 20; i++) {
        for (int v = 0; v < n; v++) {
            bin[v][i] = bin[bin[v][i - 1]][i - 1];
        }
    }
    for (int i = 0; i < q; i++) {
        int a, b;
        cin >> a >> b;
        swap(a, b);
        a--, b--;
        a = in[a], b = in[b];
        if (a == b)cout << 0 << "\n";
        else if (v1[n - 1 - a] == v1[n - 1 - b]) cout << 1 << "\n";
        else if (a > b)cout << "impossible" << "\n";
        else if (rii[a] >= b) cout << 1 << "\n";
        else {
            int ans = 0;
            for (int i = 19; i >= 0; i--) {
                if (rii[bin[a][i]] < b) {
                    a = bin[a][i];
                    ans += 1 << i;
                }
            }

            if (rii[bin[a][0]] >= b)cout << ans + 2 << "\n";
            else cout << "impossible" << "\n";
        }
    }
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 311 ms 26496 KB Output is correct
3 Correct 317 ms 28380 KB Output is correct
4 Correct 335 ms 28312 KB Output is correct
5 Correct 320 ms 28740 KB Output is correct
6 Correct 320 ms 28292 KB Output is correct
7 Correct 316 ms 28596 KB Output is correct
8 Correct 312 ms 28612 KB Output is correct
9 Correct 318 ms 28644 KB Output is correct
10 Correct 357 ms 28540 KB Output is correct
11 Correct 336 ms 28580 KB Output is correct
12 Correct 275 ms 28492 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 2 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 2 ms 468 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 2 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 2 ms 468 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 2 ms 596 KB Output is correct
14 Correct 2 ms 468 KB Output is correct
15 Correct 2 ms 572 KB Output is correct
16 Correct 3 ms 576 KB Output is correct
17 Correct 2 ms 596 KB Output is correct
18 Correct 2 ms 468 KB Output is correct
19 Correct 192 ms 3144 KB Output is correct
20 Correct 188 ms 3020 KB Output is correct
21 Correct 181 ms 3248 KB Output is correct
22 Correct 181 ms 3404 KB Output is correct
23 Correct 176 ms 3276 KB Output is correct
24 Correct 178 ms 3244 KB Output is correct
25 Correct 183 ms 2888 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 2 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 2 ms 468 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 2 ms 596 KB Output is correct
14 Correct 2 ms 568 KB Output is correct
15 Correct 2 ms 596 KB Output is correct
16 Correct 2 ms 596 KB Output is correct
17 Correct 2 ms 580 KB Output is correct
18 Correct 2 ms 576 KB Output is correct
19 Correct 163 ms 27012 KB Output is correct
20 Correct 108 ms 26236 KB Output is correct
21 Correct 141 ms 26900 KB Output is correct
22 Correct 133 ms 26948 KB Output is correct
23 Correct 128 ms 26940 KB Output is correct
24 Correct 138 ms 27020 KB Output is correct
25 Correct 106 ms 26284 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 313 ms 26644 KB Output is correct
2 Correct 319 ms 28668 KB Output is correct
3 Correct 320 ms 28672 KB Output is correct
4 Correct 320 ms 29252 KB Output is correct
5 Correct 344 ms 29048 KB Output is correct
6 Correct 347 ms 28860 KB Output is correct
7 Correct 347 ms 28892 KB Output is correct
8 Correct 343 ms 29116 KB Output is correct
9 Correct 135 ms 27104 KB Output is correct
10 Correct 320 ms 28520 KB Output is correct
11 Correct 315 ms 28380 KB Output is correct
12 Correct 333 ms 28512 KB Output is correct

Subtask #6
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 311 ms 26496 KB Output is correct
3 Correct 317 ms 28380 KB Output is correct
4 Correct 335 ms 28312 KB Output is correct
5 Correct 320 ms 28740 KB Output is correct
6 Correct 320 ms 28292 KB Output is correct
7 Correct 316 ms 28596 KB Output is correct
8 Correct 312 ms 28612 KB Output is correct
9 Correct 318 ms 28644 KB Output is correct
10 Correct 357 ms 28540 KB Output is correct
11 Correct 336 ms 28580 KB Output is correct
12 Correct 275 ms 28492 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 2 ms 468 KB Output is correct
17 Correct 2 ms 468 KB Output is correct
18 Correct 2 ms 468 KB Output is correct
19 Correct 2 ms 468 KB Output is correct
20 Correct 2 ms 468 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 2 ms 596 KB Output is correct
25 Correct 2 ms 596 KB Output is correct
26 Correct 2 ms 468 KB Output is correct
27 Correct 2 ms 572 KB Output is correct
28 Correct 3 ms 576 KB Output is correct
29 Correct 2 ms 596 KB Output is correct
30 Correct 2 ms 468 KB Output is correct
31 Correct 192 ms 3144 KB Output is correct
32 Correct 188 ms 3020 KB Output is correct
33 Correct 181 ms 3248 KB Output is correct
34 Correct 181 ms 3404 KB Output is correct
35 Correct 176 ms 3276 KB Output is correct
36 Correct 178 ms 3244 KB Output is correct
37 Correct 183 ms 2888 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 0 ms 212 KB Output is correct
40 Correct 2 ms 596 KB Output is correct
41 Correct 2 ms 596 KB Output is correct
42 Correct 2 ms 568 KB Output is correct
43 Correct 2 ms 596 KB Output is correct
44 Correct 2 ms 596 KB Output is correct
45 Correct 2 ms 580 KB Output is correct
46 Correct 2 ms 576 KB Output is correct
47 Correct 163 ms 27012 KB Output is correct
48 Correct 108 ms 26236 KB Output is correct
49 Correct 141 ms 26900 KB Output is correct
50 Correct 133 ms 26948 KB Output is correct
51 Correct 128 ms 26940 KB Output is correct
52 Correct 138 ms 27020 KB Output is correct
53 Correct 106 ms 26284 KB Output is correct
54 Correct 313 ms 26644 KB Output is correct
55 Correct 319 ms 28668 KB Output is correct
56 Correct 320 ms 28672 KB Output is correct
57 Correct 320 ms 29252 KB Output is correct
58 Correct 344 ms 29048 KB Output is correct
59 Correct 347 ms 28860 KB Output is correct
60 Correct 347 ms 28892 KB Output is correct
61 Correct 343 ms 29116 KB Output is correct
62 Correct 135 ms 27104 KB Output is correct
63 Correct 320 ms 28520 KB Output is correct
64 Correct 315 ms 28380 KB Output is correct
65 Correct 333 ms 28512 KB Output is correct
66 Correct 1 ms 212 KB Output is correct
67 Correct 322 ms 28916 KB Output is correct
68 Correct 312 ms 28736 KB Output is correct
69 Correct 326 ms 28844 KB Output is correct
70 Correct 324 ms 28876 KB Output is correct
71 Correct 311 ms 28816 KB Output is correct
72 Correct 311 ms 28788 KB Output is correct
73 Correct 305 ms 29172 KB Output is correct
74 Correct 308 ms 29192 KB Output is correct
75 Correct 327 ms 29044 KB Output is correct
76 Correct 321 ms 29176 KB Output is correct
77 Correct 276 ms 28448 KB Output is correct
78 Correct 1 ms 212 KB Output is correct
79 Correct 2 ms 596 KB Output is correct
80 Correct 2 ms 580 KB Output is correct
81 Correct 1 ms 572 KB Output is correct
82 Correct 2 ms 500 KB Output is correct
83 Correct 2 ms 596 KB Output is correct
84 Correct 2 ms 596 KB Output is correct
85 Correct 2 ms 596 KB Output is correct
86 Correct 183 ms 3012 KB Output is correct
87 Correct 176 ms 3084 KB Output is correct
88 Correct 186 ms 3332 KB Output is correct
89 Correct 178 ms 3444 KB Output is correct
90 Correct 175 ms 3176 KB Output is correct
91 Correct 178 ms 3232 KB Output is correct
92 Correct 178 ms 2912 KB Output is correct
93 Correct 132 ms 26992 KB Output is correct
94 Correct 106 ms 26140 KB Output is correct
95 Correct 145 ms 26832 KB Output is correct
96 Correct 133 ms 26956 KB Output is correct
97 Correct 130 ms 26920 KB Output is correct
98 Correct 140 ms 26992 KB Output is correct
99 Correct 97 ms 26228 KB Output is correct
100 Correct 364 ms 28924 KB Output is correct
101 Correct 359 ms 28784 KB Output is correct
102 Correct 320 ms 29044 KB Output is correct
103 Correct 313 ms 28500 KB Output is correct
104 Correct 313 ms 28356 KB Output is correct
105 Correct 309 ms 28508 KB Output is correct
106 Correct 320 ms 28208 KB Output is correct
107 Correct 308 ms 28188 KB Output is correct
108 Correct 356 ms 28800 KB Output is correct
109 Correct 318 ms 28860 KB Output is correct
110 Correct 360 ms 28804 KB Output is correct
111 Correct 343 ms 28756 KB Output is correct