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Submission #970856

# Submission time Handle Problem Language Result Execution time Memory
970856 2024-04-27T11:40:26 Z kl0989e Event Hopping (BOI22_events) C++17
100 / 100
 152 ms 29880 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define fi first
#define se second
#define pb push_back
#define vi vector<int>
#define pi pair<int, int>
#define all(x) (x).begin(),(x).end()

const int maxn=1e5+10;
const int LOG=int(log2(maxn))+1;
vector<pi> events(maxn);
vector<vi> table(maxn,vi(LOG,-1));
vector<vector<pi>> rmq(LOG,vector<pi>(maxn,{1000000010,-1}));
vi pow2(LOG,1);

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n,q;
    cin >> n >> q;
    vi b;
    for (int i = 0; i < n; i++) {
        cin >> events[i].fi >> events[i].se;
        b.push_back(events[i].se);
    }
    sort(all(b));
    b.erase(unique(all(b)),b.end());
    for (int i=0; i<n; i++) {
        int r=lower_bound(all(b),events[i].se)-b.begin();
        rmq[0][r]=min(rmq[0][r],{events[i].fi,i});
    }
    for (int i=0; i+1<LOG; i++) {
        for (int j=0; j+(1<<(i+1))<=n; j++) {
            rmq[i+1][j]=min(rmq[i][j],rmq[i][j+(1<<i)]);
        }
    }
    for (int i=0; i<n; i++) {
        int l=lower_bound(all(b),events[i].fi)-b.begin();
        int r=lower_bound(all(b),events[i].se)-b.begin();
        int h=31-__builtin_clz(r-l+1);
        table[i][0]=min(rmq[h][l],rmq[h][r+1-(1<<h)]).se;
    }
    for (int i=0; i+1<LOG; i++) {
        for (int j = 0; j < n; j++) {
            table[j][i+1]=table[table[j][i]][i];
        }
    }
    int x,y,l;
    for (int i=0; i<q; i++) {
        l=1;
        cin >> x >> y;
        x--;
        y--;
        if (x==y) {
            cout << "0\n";
            continue;
        }
        if (events[y].fi<=events[x].se && events[x].se<=events[y].se) {
            cout << "1\n";
            continue;
        }
        for (int i=LOG-1; i>=0; i--) {
            if (events[x].se<events[table[y][i]].fi) {
                l+=1<<i;
                y=table[y][i];
            }
        }
        y=table[y][0];
        if (events[x].se<events[y].fi || events[x].se>events[y].se) {
            cout << "impossible\n";
        }
        else {
            cout << l+(events[x].se>=events[y].fi) << "\n";
        }
    }
    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 25436 KB Output is correct
2 Correct 98 ms 29252 KB Output is correct
3 Correct 115 ms 29376 KB Output is correct
4 Correct 140 ms 29600 KB Output is correct
5 Correct 125 ms 29248 KB Output is correct
6 Correct 123 ms 29376 KB Output is correct
7 Correct 120 ms 29252 KB Output is correct
8 Correct 91 ms 29764 KB Output is correct
9 Correct 90 ms 29880 KB Output is correct
10 Correct 116 ms 29640 KB Output is correct
11 Correct 125 ms 29584 KB Output is correct
12 Correct 63 ms 28996 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 25432 KB Output is correct
2 Correct 15 ms 25432 KB Output is correct
3 Correct 14 ms 25432 KB Output is correct
4 Correct 14 ms 25436 KB Output is correct
5 Correct 15 ms 25600 KB Output is correct
6 Correct 13 ms 25436 KB Output is correct
7 Correct 14 ms 25432 KB Output is correct
8 Correct 14 ms 25436 KB Output is correct
9 Correct 13 ms 25436 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 25432 KB Output is correct
2 Correct 15 ms 25432 KB Output is correct
3 Correct 14 ms 25432 KB Output is correct
4 Correct 14 ms 25436 KB Output is correct
5 Correct 15 ms 25600 KB Output is correct
6 Correct 13 ms 25436 KB Output is correct
7 Correct 14 ms 25432 KB Output is correct
8 Correct 14 ms 25436 KB Output is correct
9 Correct 13 ms 25436 KB Output is correct
10 Correct 15 ms 25432 KB Output is correct
11 Correct 15 ms 25436 KB Output is correct
12 Correct 14 ms 25512 KB Output is correct
13 Correct 14 ms 25436 KB Output is correct
14 Correct 13 ms 25436 KB Output is correct
15 Correct 15 ms 25436 KB Output is correct
16 Correct 14 ms 25536 KB Output is correct
17 Correct 14 ms 25436 KB Output is correct
18 Correct 13 ms 25436 KB Output is correct
19 Correct 38 ms 26124 KB Output is correct
20 Correct 38 ms 26180 KB Output is correct
21 Correct 41 ms 26504 KB Output is correct
22 Correct 35 ms 26432 KB Output is correct
23 Correct 31 ms 26436 KB Output is correct
24 Correct 30 ms 26424 KB Output is correct
25 Correct 34 ms 25932 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 25432 KB Output is correct
2 Correct 15 ms 25432 KB Output is correct
3 Correct 14 ms 25432 KB Output is correct
4 Correct 14 ms 25436 KB Output is correct
5 Correct 15 ms 25600 KB Output is correct
6 Correct 13 ms 25436 KB Output is correct
7 Correct 14 ms 25432 KB Output is correct
8 Correct 14 ms 25436 KB Output is correct
9 Correct 13 ms 25436 KB Output is correct
10 Correct 13 ms 25432 KB Output is correct
11 Correct 13 ms 25436 KB Output is correct
12 Correct 14 ms 25436 KB Output is correct
13 Correct 13 ms 25436 KB Output is correct
14 Correct 13 ms 25396 KB Output is correct
15 Correct 13 ms 25432 KB Output is correct
16 Correct 14 ms 25404 KB Output is correct
17 Correct 14 ms 25436 KB Output is correct
18 Correct 13 ms 25412 KB Output is correct
19 Correct 81 ms 27640 KB Output is correct
20 Correct 72 ms 26832 KB Output is correct
21 Correct 70 ms 27536 KB Output is correct
22 Correct 74 ms 27468 KB Output is correct
23 Correct 62 ms 27460 KB Output is correct
24 Correct 72 ms 27596 KB Output is correct
25 Correct 33 ms 26900 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 96 ms 29084 KB Output is correct
2 Correct 130 ms 28932 KB Output is correct
3 Correct 136 ms 28884 KB Output is correct
4 Correct 89 ms 29504 KB Output is correct
5 Correct 115 ms 29640 KB Output is correct
6 Correct 113 ms 29512 KB Output is correct
7 Correct 117 ms 29388 KB Output is correct
8 Correct 99 ms 29504 KB Output is correct
9 Correct 66 ms 27624 KB Output is correct
10 Correct 110 ms 28960 KB Output is correct
11 Correct 89 ms 28884 KB Output is correct
12 Correct 113 ms 28992 KB Output is correct

Subtask #6
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 25436 KB Output is correct
2 Correct 98 ms 29252 KB Output is correct
3 Correct 115 ms 29376 KB Output is correct
4 Correct 140 ms 29600 KB Output is correct
5 Correct 125 ms 29248 KB Output is correct
6 Correct 123 ms 29376 KB Output is correct
7 Correct 120 ms 29252 KB Output is correct
8 Correct 91 ms 29764 KB Output is correct
9 Correct 90 ms 29880 KB Output is correct
10 Correct 116 ms 29640 KB Output is correct
11 Correct 125 ms 29584 KB Output is correct
12 Correct 63 ms 28996 KB Output is correct
13 Correct 13 ms 25432 KB Output is correct
14 Correct 15 ms 25432 KB Output is correct
15 Correct 14 ms 25432 KB Output is correct
16 Correct 14 ms 25436 KB Output is correct
17 Correct 15 ms 25600 KB Output is correct
18 Correct 13 ms 25436 KB Output is correct
19 Correct 14 ms 25432 KB Output is correct
20 Correct 14 ms 25436 KB Output is correct
21 Correct 13 ms 25436 KB Output is correct
22 Correct 15 ms 25432 KB Output is correct
23 Correct 15 ms 25436 KB Output is correct
24 Correct 14 ms 25512 KB Output is correct
25 Correct 14 ms 25436 KB Output is correct
26 Correct 13 ms 25436 KB Output is correct
27 Correct 15 ms 25436 KB Output is correct
28 Correct 14 ms 25536 KB Output is correct
29 Correct 14 ms 25436 KB Output is correct
30 Correct 13 ms 25436 KB Output is correct
31 Correct 38 ms 26124 KB Output is correct
32 Correct 38 ms 26180 KB Output is correct
33 Correct 41 ms 26504 KB Output is correct
34 Correct 35 ms 26432 KB Output is correct
35 Correct 31 ms 26436 KB Output is correct
36 Correct 30 ms 26424 KB Output is correct
37 Correct 34 ms 25932 KB Output is correct
38 Correct 13 ms 25432 KB Output is correct
39 Correct 13 ms 25436 KB Output is correct
40 Correct 14 ms 25436 KB Output is correct
41 Correct 13 ms 25436 KB Output is correct
42 Correct 13 ms 25396 KB Output is correct
43 Correct 13 ms 25432 KB Output is correct
44 Correct 14 ms 25404 KB Output is correct
45 Correct 14 ms 25436 KB Output is correct
46 Correct 13 ms 25412 KB Output is correct
47 Correct 81 ms 27640 KB Output is correct
48 Correct 72 ms 26832 KB Output is correct
49 Correct 70 ms 27536 KB Output is correct
50 Correct 74 ms 27468 KB Output is correct
51 Correct 62 ms 27460 KB Output is correct
52 Correct 72 ms 27596 KB Output is correct
53 Correct 33 ms 26900 KB Output is correct
54 Correct 96 ms 29084 KB Output is correct
55 Correct 130 ms 28932 KB Output is correct
56 Correct 136 ms 28884 KB Output is correct
57 Correct 89 ms 29504 KB Output is correct
58 Correct 115 ms 29640 KB Output is correct
59 Correct 113 ms 29512 KB Output is correct
60 Correct 117 ms 29388 KB Output is correct
61 Correct 99 ms 29504 KB Output is correct
62 Correct 66 ms 27624 KB Output is correct
63 Correct 110 ms 28960 KB Output is correct
64 Correct 89 ms 28884 KB Output is correct
65 Correct 113 ms 28992 KB Output is correct
66 Correct 17 ms 25944 KB Output is correct
67 Correct 97 ms 29300 KB Output is correct
68 Correct 112 ms 29376 KB Output is correct
69 Correct 152 ms 29376 KB Output is correct
70 Correct 130 ms 29384 KB Output is correct
71 Correct 113 ms 29408 KB Output is correct
72 Correct 115 ms 29424 KB Output is correct
73 Correct 90 ms 29764 KB Output is correct
74 Correct 88 ms 29628 KB Output is correct
75 Correct 122 ms 29604 KB Output is correct
76 Correct 107 ms 29572 KB Output is correct
77 Correct 61 ms 28996 KB Output is correct
78 Correct 15 ms 25428 KB Output is correct
79 Correct 14 ms 25436 KB Output is correct
80 Correct 13 ms 25436 KB Output is correct
81 Correct 13 ms 25436 KB Output is correct
82 Correct 13 ms 25436 KB Output is correct
83 Correct 13 ms 25496 KB Output is correct
84 Correct 13 ms 25436 KB Output is correct
85 Correct 13 ms 25436 KB Output is correct
86 Correct 39 ms 26180 KB Output is correct
87 Correct 38 ms 26180 KB Output is correct
88 Correct 41 ms 26436 KB Output is correct
89 Correct 32 ms 26536 KB Output is correct
90 Correct 32 ms 26436 KB Output is correct
91 Correct 29 ms 26432 KB Output is correct
92 Correct 34 ms 25932 KB Output is correct
93 Correct 76 ms 27640 KB Output is correct
94 Correct 70 ms 26700 KB Output is correct
95 Correct 76 ms 27432 KB Output is correct
96 Correct 75 ms 27644 KB Output is correct
97 Correct 67 ms 27620 KB Output is correct
98 Correct 72 ms 27456 KB Output is correct
99 Correct 32 ms 26944 KB Output is correct
100 Correct 112 ms 29380 KB Output is correct
101 Correct 132 ms 29380 KB Output is correct
102 Correct 98 ms 29640 KB Output is correct
103 Correct 110 ms 28992 KB Output is correct
104 Correct 90 ms 28832 KB Output is correct
105 Correct 115 ms 29124 KB Output is correct
106 Correct 101 ms 28604 KB Output is correct
107 Correct 120 ms 28620 KB Output is correct
108 Correct 96 ms 29248 KB Output is correct
109 Correct 108 ms 29516 KB Output is correct
110 Correct 90 ms 29380 KB Output is correct
111 Correct 92 ms 29252 KB Output is correct