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Submission #1080415

# Submission time Handle Problem Language Result Execution time Memory
1080415 2024-08-29T09:39:13 Z someone Fire (BOI24_fire) C++14
100 / 100
 294 ms 48108 KB 
#include <bits/stdc++.h>
#define sz(x) ((int)x.size())
#define all(x) x.begin(), x.end()
using u32 = unsigned int;
using i64 = long long;
using u64 = unsigned long long;
using namespace std;

const int N = 4e5 + 42, T = 18, INF = 1e9 + 42;

struct Inter {
    int l, r;
};

struct Event {
    int t, id, isDeb;
};

int bl[T][N];

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    
    int n, m; cin >> n >> m;
    
    vector<Inter> inter;
    for(int i = 0; i < n; i++) {
        int s, e; cin >> s >> e;
        if(s < e) {
            inter.push_back({s, e});
            inter.push_back({s+m, e+m});
        } else {
            inter.push_back({s, e+m});
        }
    }
    vector<Event> ev;
    for(int i = 0; i < sz(inter); i++) {
        ev.push_back({inter[i].l, i, 0});
        ev.push_back({inter[i].r, i, 1});
    }
    sort(all(ev),
    [](Event a, Event b) {
        if(a.t == b.t) return a.isDeb < b.isDeb;
        return a.t < b.t;
    });

    set<array<int, 2>> fins;
    vector<bool> occ(sz(inter));
    for(Event e : ev) {
        if(occ[e.id]) {
            occ[e.id] = 0;
            auto it = fins.end();
            it--;
            bl[0][e.id] = (*it)[1];
            fins.erase(array<int, 2>{inter[e.id].r, e.id});
        } else {
            occ[e.id] = 1;
            fins.insert(array<int, 2>{inter[e.id].r, e.id});
        }
    }
    for(int i = 1; i < T; i++)
        for(int j = 0; j < sz(inter); j++)
            bl[i][j] = bl[i-1][bl[i-1][j]];
    
    int mini = INF;
    for(int i = 0; i < sz(inter); i++) if(inter[i].l <= m) {
        int id = i, ans = 2;
        for(int j = T-1; j >= 0; j--)
            if((j == 0 || bl[j][id] != bl[j-1][id]) && inter[bl[j][id]].r < inter[i].l + m) {
                ans += (1 << j);
                id = bl[j][id];
            }
        if(inter[bl[0][id]].r >= inter[i].l + m)
            mini = min(mini, ans);
    }

    cout << (mini == INF ? -1 : mini) << '\n';
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 464 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 460 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 0 ms 468 KB Output is correct
23 Correct 1 ms 348 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 464 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 460 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 0 ms 468 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 1 ms 604 KB Output is correct
28 Correct 0 ms 464 KB Output is correct
29 Correct 1 ms 600 KB Output is correct
30 Correct 1 ms 604 KB Output is correct
31 Correct 1 ms 668 KB Output is correct
32 Correct 0 ms 604 KB Output is correct
33 Correct 1 ms 608 KB Output is correct
34 Correct 2 ms 608 KB Output is correct
35 Correct 1 ms 616 KB Output is correct
36 Correct 1 ms 616 KB Output is correct
37 Correct 1 ms 604 KB Output is correct
38 Correct 1 ms 612 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 464 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 460 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 0 ms 468 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 1 ms 604 KB Output is correct
28 Correct 0 ms 464 KB Output is correct
29 Correct 1 ms 600 KB Output is correct
30 Correct 1 ms 604 KB Output is correct
31 Correct 1 ms 668 KB Output is correct
32 Correct 0 ms 604 KB Output is correct
33 Correct 1 ms 608 KB Output is correct
34 Correct 2 ms 608 KB Output is correct
35 Correct 1 ms 616 KB Output is correct
36 Correct 1 ms 616 KB Output is correct
37 Correct 1 ms 604 KB Output is correct
38 Correct 1 ms 612 KB Output is correct
39 Correct 5 ms 1692 KB Output is correct
40 Correct 4 ms 1776 KB Output is correct
41 Correct 4 ms 1688 KB Output is correct
42 Correct 5 ms 1684 KB Output is correct
43 Correct 5 ms 1684 KB Output is correct
44 Correct 5 ms 1936 KB Output is correct
45 Correct 6 ms 1756 KB Output is correct
46 Correct 5 ms 1684 KB Output is correct
47 Correct 6 ms 1688 KB Output is correct
48 Correct 4 ms 1688 KB Output is correct
49 Correct 3 ms 1688 KB Output is correct
50 Correct 4 ms 1668 KB Output is correct

Subtask #4
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 600 KB Output is correct
8 Correct 0 ms 464 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 1 ms 600 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 6 ms 1688 KB Output is correct
16 Correct 4 ms 1848 KB Output is correct
17 Correct 5 ms 1684 KB Output is correct
18 Correct 6 ms 1936 KB Output is correct
19 Correct 4 ms 1688 KB Output is correct
20 Correct 165 ms 41124 KB Output is correct
21 Correct 212 ms 48040 KB Output is correct
22 Correct 203 ms 48104 KB Output is correct
23 Correct 294 ms 46956 KB Output is correct
24 Correct 255 ms 47956 KB Output is correct
25 Correct 266 ms 43952 KB Output is correct
26 Correct 225 ms 48036 KB Output is correct
27 Correct 219 ms 48092 KB Output is correct
28 Correct 178 ms 48100 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 464 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 5 ms 1940 KB Output is correct
13 Correct 3 ms 1688 KB Output is correct
14 Correct 4 ms 1684 KB Output is correct
15 Correct 160 ms 41112 KB Output is correct
16 Correct 217 ms 47004 KB Output is correct
17 Correct 210 ms 48040 KB Output is correct
18 Correct 227 ms 45972 KB Output is correct
19 Correct 234 ms 47856 KB Output is correct
20 Correct 246 ms 47144 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 464 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 460 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 0 ms 468 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 1 ms 604 KB Output is correct
28 Correct 0 ms 464 KB Output is correct
29 Correct 1 ms 600 KB Output is correct
30 Correct 1 ms 604 KB Output is correct
31 Correct 1 ms 668 KB Output is correct
32 Correct 0 ms 604 KB Output is correct
33 Correct 1 ms 608 KB Output is correct
34 Correct 2 ms 608 KB Output is correct
35 Correct 1 ms 616 KB Output is correct
36 Correct 1 ms 616 KB Output is correct
37 Correct 1 ms 604 KB Output is correct
38 Correct 1 ms 612 KB Output is correct
39 Correct 5 ms 1692 KB Output is correct
40 Correct 4 ms 1776 KB Output is correct
41 Correct 4 ms 1688 KB Output is correct
42 Correct 5 ms 1684 KB Output is correct
43 Correct 5 ms 1684 KB Output is correct
44 Correct 5 ms 1936 KB Output is correct
45 Correct 6 ms 1756 KB Output is correct
46 Correct 5 ms 1684 KB Output is correct
47 Correct 6 ms 1688 KB Output is correct
48 Correct 4 ms 1688 KB Output is correct
49 Correct 3 ms 1688 KB Output is correct
50 Correct 4 ms 1668 KB Output is correct
51 Correct 1 ms 348 KB Output is correct
52 Correct 0 ms 348 KB Output is correct
53 Correct 1 ms 348 KB Output is correct
54 Correct 0 ms 348 KB Output is correct
55 Correct 1 ms 348 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 1 ms 600 KB Output is correct
58 Correct 0 ms 464 KB Output is correct
59 Correct 1 ms 604 KB Output is correct
60 Correct 1 ms 600 KB Output is correct
61 Correct 1 ms 604 KB Output is correct
62 Correct 1 ms 600 KB Output is correct
63 Correct 1 ms 604 KB Output is correct
64 Correct 1 ms 604 KB Output is correct
65 Correct 6 ms 1688 KB Output is correct
66 Correct 4 ms 1848 KB Output is correct
67 Correct 5 ms 1684 KB Output is correct
68 Correct 6 ms 1936 KB Output is correct
69 Correct 4 ms 1688 KB Output is correct
70 Correct 165 ms 41124 KB Output is correct
71 Correct 212 ms 48040 KB Output is correct
72 Correct 203 ms 48104 KB Output is correct
73 Correct 294 ms 46956 KB Output is correct
74 Correct 255 ms 47956 KB Output is correct
75 Correct 266 ms 43952 KB Output is correct
76 Correct 225 ms 48036 KB Output is correct
77 Correct 219 ms 48092 KB Output is correct
78 Correct 178 ms 48100 KB Output is correct
79 Correct 1 ms 464 KB Output is correct
80 Correct 0 ms 348 KB Output is correct
81 Correct 1 ms 348 KB Output is correct
82 Correct 1 ms 348 KB Output is correct
83 Correct 1 ms 348 KB Output is correct
84 Correct 0 ms 348 KB Output is correct
85 Correct 0 ms 348 KB Output is correct
86 Correct 1 ms 604 KB Output is correct
87 Correct 1 ms 604 KB Output is correct
88 Correct 1 ms 604 KB Output is correct
89 Correct 1 ms 604 KB Output is correct
90 Correct 5 ms 1940 KB Output is correct
91 Correct 3 ms 1688 KB Output is correct
92 Correct 4 ms 1684 KB Output is correct
93 Correct 160 ms 41112 KB Output is correct
94 Correct 217 ms 47004 KB Output is correct
95 Correct 210 ms 48040 KB Output is correct
96 Correct 227 ms 45972 KB Output is correct
97 Correct 234 ms 47856 KB Output is correct
98 Correct 246 ms 47144 KB Output is correct
99 Correct 184 ms 47868 KB Output is correct
100 Correct 260 ms 48040 KB Output is correct
101 Correct 245 ms 48076 KB Output is correct
102 Correct 214 ms 48108 KB Output is correct
103 Correct 246 ms 47860 KB Output is correct
104 Correct 195 ms 48036 KB Output is correct
105 Correct 109 ms 46708 KB Output is correct