oj.uz

Submission #599216

# Submission time Handle Problem Language Result Execution time Memory
599216 2022-07-19T11:42:52 Z Vanilla Event Hopping (BOI22_events) C++17
100 / 100
 546 ms 235792 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long int64;
const int maxn = 2e5 + 2;
const int lg = 20;

struct node {
    int l,r;
    pair <int, int> v;

    node* left;
    node* right;

    node(int _l, int _r, pair <int, int> _v): l(_l), r(_r), v(_v) {};
    
    inline void extend() {
        if (left != NULL) return;
        int mid = (l + r) / 2;
        left = new node(l, mid, {1e9, -1});
        right = new node(mid + 1, r, {1e9, -1});
    }

    inline pair <int, int> query (int il, int ir) {
        if (il <= l && r <= ir) return v;
        if (l > ir || r < il) return {1e9, -1};
        extend();
        return min(left->query(il, ir), right->query(il, ir));
    }

    inline void update (int x, pair <int, int> nval) {
        if (l == r && l == x) return void(v = min(nval, v));
        if (l > x || r < x) return;
        extend();
        left->update(x, nval);
        right->update(x, nval);
        v = min(left->v, right->v);
    }
};
 
struct nd {
    int x;
    int y;
} a [maxn];

int bin[maxn][lg];
int n,q;
int ps[maxn];
node *sgt = new node(1, 1e9, {1e15, -1});


int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> n >> q;
    for (int i = 0; i < n; i++){
        cin >> a[i].x >> a[i].y;
    }
    for (int i = 0; i < n; i++){
        sgt->update(a[i].y, {a[i].x, i});
    }
    for (int i = 0; i < n; i++){
        bin[i][0] = sgt->query(a[i].x, a[i].y).second;
    }
    for (int k = 1; k < lg; k++){
        for (int i = 0; i < n; i++){
            bin[i][k] = bin[bin[i][k-1]][k-1];
        }
    }
    while (q--){
        int x,y, rs = 2;
        cin >> x >> y;
        x--, y--;
        if (x == y) cout << "0\n";
        else if (a[x].y > a[y].y) cout << "impossible\n";
        else if (a[x].y >= a[y].x) cout << "1\n";
        else {
            for (int i = lg - 1; i >= 0; i--){
                if (a[bin[y][i]].x > a[x].y) y = bin[y][i], rs+=(1 << i);
            }
            if (a[bin[y][0]].x > a[x].y) cout << "impossible\n";
            else cout << rs << "\n";
        }
    }
    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 439 ms 129572 KB Output is correct
3 Correct 419 ms 133096 KB Output is correct
4 Correct 514 ms 135728 KB Output is correct
5 Correct 484 ms 145568 KB Output is correct
6 Correct 466 ms 152784 KB Output is correct
7 Correct 445 ms 149248 KB Output is correct
8 Correct 479 ms 203084 KB Output is correct
9 Correct 475 ms 235764 KB Output is correct
10 Correct 380 ms 126848 KB Output is correct
11 Correct 404 ms 154364 KB Output is correct
12 Correct 125 ms 28280 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 236 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 5 ms 2320 KB Output is correct
4 Correct 3 ms 2152 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 3 ms 1260 KB Output is correct
7 Correct 5 ms 3924 KB Output is correct
8 Correct 5 ms 3824 KB Output is correct
9 Correct 1 ms 340 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 236 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 5 ms 2320 KB Output is correct
4 Correct 3 ms 2152 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 3 ms 1260 KB Output is correct
7 Correct 5 ms 3924 KB Output is correct
8 Correct 5 ms 3824 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 5 ms 2156 KB Output is correct
13 Correct 3 ms 2260 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 3 ms 1364 KB Output is correct
16 Correct 7 ms 3924 KB Output is correct
17 Correct 6 ms 3924 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 44 ms 2784 KB Output is correct
20 Correct 40 ms 9884 KB Output is correct
21 Correct 32 ms 2912 KB Output is correct
22 Correct 31 ms 6588 KB Output is correct
23 Correct 40 ms 17612 KB Output is correct
24 Correct 42 ms 17752 KB Output is correct
25 Correct 47 ms 17312 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 236 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 5 ms 2320 KB Output is correct
4 Correct 3 ms 2152 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 3 ms 1260 KB Output is correct
7 Correct 5 ms 3924 KB Output is correct
8 Correct 5 ms 3824 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 3 ms 2132 KB Output is correct
13 Correct 4 ms 2260 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 3 ms 1256 KB Output is correct
16 Correct 5 ms 3924 KB Output is correct
17 Correct 5 ms 3924 KB Output is correct
18 Correct 1 ms 356 KB Output is correct
19 Correct 341 ms 129440 KB Output is correct
20 Correct 159 ms 19544 KB Output is correct
21 Correct 307 ms 70492 KB Output is correct
22 Correct 410 ms 142328 KB Output is correct
23 Correct 474 ms 234340 KB Output is correct
24 Correct 467 ms 234304 KB Output is correct
25 Correct 49 ms 10060 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 358 ms 129504 KB Output is correct
2 Correct 390 ms 133076 KB Output is correct
3 Correct 422 ms 135744 KB Output is correct
4 Correct 448 ms 235732 KB Output is correct
5 Correct 386 ms 126816 KB Output is correct
6 Correct 512 ms 235384 KB Output is correct
7 Correct 536 ms 235300 KB Output is correct
8 Correct 507 ms 235572 KB Output is correct
9 Correct 483 ms 234644 KB Output is correct
10 Correct 505 ms 235056 KB Output is correct
11 Correct 481 ms 234844 KB Output is correct
12 Correct 519 ms 234908 KB Output is correct

Subtask #6
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 439 ms 129572 KB Output is correct
3 Correct 419 ms 133096 KB Output is correct
4 Correct 514 ms 135728 KB Output is correct
5 Correct 484 ms 145568 KB Output is correct
6 Correct 466 ms 152784 KB Output is correct
7 Correct 445 ms 149248 KB Output is correct
8 Correct 479 ms 203084 KB Output is correct
9 Correct 475 ms 235764 KB Output is correct
10 Correct 380 ms 126848 KB Output is correct
11 Correct 404 ms 154364 KB Output is correct
12 Correct 125 ms 28280 KB Output is correct
13 Correct 0 ms 236 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 5 ms 2320 KB Output is correct
16 Correct 3 ms 2152 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 3 ms 1260 KB Output is correct
19 Correct 5 ms 3924 KB Output is correct
20 Correct 5 ms 3824 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 0 ms 340 KB Output is correct
24 Correct 5 ms 2156 KB Output is correct
25 Correct 3 ms 2260 KB Output is correct
26 Correct 1 ms 468 KB Output is correct
27 Correct 3 ms 1364 KB Output is correct
28 Correct 7 ms 3924 KB Output is correct
29 Correct 6 ms 3924 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 44 ms 2784 KB Output is correct
32 Correct 40 ms 9884 KB Output is correct
33 Correct 32 ms 2912 KB Output is correct
34 Correct 31 ms 6588 KB Output is correct
35 Correct 40 ms 17612 KB Output is correct
36 Correct 42 ms 17752 KB Output is correct
37 Correct 47 ms 17312 KB Output is correct
38 Correct 1 ms 340 KB Output is correct
39 Correct 1 ms 340 KB Output is correct
40 Correct 3 ms 2132 KB Output is correct
41 Correct 4 ms 2260 KB Output is correct
42 Correct 1 ms 468 KB Output is correct
43 Correct 3 ms 1256 KB Output is correct
44 Correct 5 ms 3924 KB Output is correct
45 Correct 5 ms 3924 KB Output is correct
46 Correct 1 ms 356 KB Output is correct
47 Correct 341 ms 129440 KB Output is correct
48 Correct 159 ms 19544 KB Output is correct
49 Correct 307 ms 70492 KB Output is correct
50 Correct 410 ms 142328 KB Output is correct
51 Correct 474 ms 234340 KB Output is correct
52 Correct 467 ms 234304 KB Output is correct
53 Correct 49 ms 10060 KB Output is correct
54 Correct 358 ms 129504 KB Output is correct
55 Correct 390 ms 133076 KB Output is correct
56 Correct 422 ms 135744 KB Output is correct
57 Correct 448 ms 235732 KB Output is correct
58 Correct 386 ms 126816 KB Output is correct
59 Correct 512 ms 235384 KB Output is correct
60 Correct 536 ms 235300 KB Output is correct
61 Correct 507 ms 235572 KB Output is correct
62 Correct 483 ms 234644 KB Output is correct
63 Correct 505 ms 235056 KB Output is correct
64 Correct 481 ms 234844 KB Output is correct
65 Correct 519 ms 234908 KB Output is correct
66 Correct 1 ms 340 KB Output is correct
67 Correct 375 ms 128968 KB Output is correct
68 Correct 367 ms 133168 KB Output is correct
69 Correct 398 ms 135844 KB Output is correct
70 Correct 425 ms 145660 KB Output is correct
71 Correct 392 ms 152884 KB Output is correct
72 Correct 409 ms 149268 KB Output is correct
73 Correct 415 ms 203100 KB Output is correct
74 Correct 420 ms 235792 KB Output is correct
75 Correct 400 ms 126872 KB Output is correct
76 Correct 440 ms 154324 KB Output is correct
77 Correct 121 ms 28228 KB Output is correct
78 Correct 1 ms 340 KB Output is correct
79 Correct 3 ms 2132 KB Output is correct
80 Correct 4 ms 2260 KB Output is correct
81 Correct 1 ms 468 KB Output is correct
82 Correct 3 ms 1364 KB Output is correct
83 Correct 6 ms 3816 KB Output is correct
84 Correct 5 ms 3924 KB Output is correct
85 Correct 1 ms 364 KB Output is correct
86 Correct 45 ms 2816 KB Output is correct
87 Correct 42 ms 9932 KB Output is correct
88 Correct 31 ms 2960 KB Output is correct
89 Correct 33 ms 6524 KB Output is correct
90 Correct 44 ms 17680 KB Output is correct
91 Correct 42 ms 17712 KB Output is correct
92 Correct 50 ms 17332 KB Output is correct
93 Correct 331 ms 129772 KB Output is correct
94 Correct 136 ms 19472 KB Output is correct
95 Correct 350 ms 70848 KB Output is correct
96 Correct 363 ms 142592 KB Output is correct
97 Correct 487 ms 234552 KB Output is correct
98 Correct 544 ms 234508 KB Output is correct
99 Correct 43 ms 10228 KB Output is correct
100 Correct 509 ms 235332 KB Output is correct
101 Correct 532 ms 235484 KB Output is correct
102 Correct 497 ms 235608 KB Output is correct
103 Correct 512 ms 235020 KB Output is correct
104 Correct 494 ms 234876 KB Output is correct
105 Correct 523 ms 234956 KB Output is correct
106 Correct 192 ms 18376 KB Output is correct
107 Correct 171 ms 20792 KB Output is correct
108 Correct 337 ms 71872 KB Output is correct
109 Correct 341 ms 71768 KB Output is correct
110 Correct 546 ms 235172 KB Output is correct
111 Correct 509 ms 235396 KB Output is correct