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Submission #1056150

# Submission time Handle Problem Language Result Execution time Memory
1056150 2024-08-13T07:58:48 Z anango Fire (BOI24_fire) C++17
100 / 100
 1066 ms 270252 KB 
#include <bits/stdc++.h>
#define int long long
using namespace std;


const int K = 20;
int INF = 1LL<<60;

signed main() {
    #ifndef ONLINE_JUDGE
        // for getting input from input.txt
        //freopen("input.txt", "r", stdin);
        // for writing output to output.txt
        //freopen("output.txt", "w", stdout);
    #endif
    #ifdef ONLINE_JUDGE
    	ios_base::sync_with_stdio(false);
    	cin.tie(NULL);
    #endif //fast IO
    int n,m; cin >> n >> m;
    vector<pair<int,int>> segments;
    vector<int> coords;
    //coords.push_back(0); //0 to m-1
    map<int,int> rev;
    for (int i=0; i<n; i++) {
        int l,r; cin >> l >> r;
        if (l<r) {
            segments.push_back({l,r}); 
            coords.push_back(l); 
            coords.push_back(r);
            segments.push_back({m+l,m+r}); 
            coords.push_back(m+l); 
            coords.push_back(m+r);
        }
        else {
            segments.push_back({l,m+r}); 
            coords.push_back(l); 
            coords.push_back(m+r);
        }
    }
    int n0 = segments.size();
    sort(coords.begin(), coords.end());
    coords.erase(unique(coords.begin(), coords.end()),coords.end());
    int k = coords.size();
    for (int i=0; i<k; i++) {
        rev[coords[i]] = i;
    }
    for (int i=0; i<n0; i++) {
        segments[i] = {rev[segments[i].first],rev[segments[i].second]};
    }
    vector<int> go(k,-1);
    multiset<int> ends;
    set<int> indices;
    sort(segments.begin(), segments.end());
    int pointer = 0;
    int lpointer = 0;
    for (int i=0; i<k; i++) {
        while (pointer<n0 && segments[pointer].first==i) {
            indices.insert(pointer);
            ends.insert(segments[pointer].second);
            pointer++;
        }
        if (!ends.size()) {
            go[i] = -1;
        }
        else {
            go[i] = *ends.rbegin();
        }
        while (lpointer<n0 && segments[lpointer].second==i) {
            indices.erase(lpointer);
            ends.erase(ends.find(segments[lpointer].second));
            lpointer++;
        }
    }
    for (int i=0; i<k; i++) {
        //cout << i <<" " << coords[i] <<" " << go[i] << " " << coords[go[i]] << endl;
    }
    vector<vector<int>> lift(k,vector<int>(K,-1));
    for (int i=0; i<k; i++) {
        lift[i][0] = go[i];
    }
    for (int p=1; p<K; p++) {
        for (int i=0; i<k; i++) {
            lift[i][p] = lift[lift[i][p-1]][p-1];
        }
    }
    int mians = INF;
    for (int i=0; i<k; i++) {
        int cur = i;
        int ct = 0;
        for (int p=K-1; p>=0; p--) {
            if (coords[lift[cur][p]]<coords[i]+m) {
                cur = lift[cur][p];
                ct+=1<<p;
            }
        }
        int p = 0;
        if (coords[lift[cur][p]]<=coords[i]+m) {
            cur = lift[cur][p];
            ct++;
        }
        if (coords[cur]>=coords[i]+m) {
            mians=min(mians,ct);
        }
    }
    if (mians<INF) cout << mians << endl;
    else cout << -1 << endl;



    
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 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 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 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 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 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 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 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 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 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 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 600 KB Output is correct
27 Correct 0 ms 604 KB Output is correct
28 Correct 1 ms 604 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 1 ms 604 KB Output is correct
31 Correct 1 ms 604 KB Output is correct
32 Correct 1 ms 604 KB Output is correct
33 Correct 1 ms 604 KB Output is correct
34 Correct 1 ms 604 KB Output is correct
35 Correct 1 ms 604 KB Output is correct
36 Correct 1 ms 604 KB Output is correct
37 Correct 1 ms 604 KB Output is correct
38 Correct 0 ms 604 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 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 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 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 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 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 600 KB Output is correct
27 Correct 0 ms 604 KB Output is correct
28 Correct 1 ms 604 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 1 ms 604 KB Output is correct
31 Correct 1 ms 604 KB Output is correct
32 Correct 1 ms 604 KB Output is correct
33 Correct 1 ms 604 KB Output is correct
34 Correct 1 ms 604 KB Output is correct
35 Correct 1 ms 604 KB Output is correct
36 Correct 1 ms 604 KB Output is correct
37 Correct 1 ms 604 KB Output is correct
38 Correct 0 ms 604 KB Output is correct
39 Correct 14 ms 6872 KB Output is correct
40 Correct 13 ms 7124 KB Output is correct
41 Correct 14 ms 6032 KB Output is correct
42 Correct 10 ms 3288 KB Output is correct
43 Correct 8 ms 3796 KB Output is correct
44 Correct 10 ms 4316 KB Output is correct
45 Correct 10 ms 4156 KB Output is correct
46 Correct 10 ms 4284 KB Output is correct
47 Correct 13 ms 6876 KB Output is correct
48 Correct 14 ms 6872 KB Output is correct
49 Correct 11 ms 6936 KB Output is correct
50 Correct 8 ms 3288 KB Output is correct

Subtask #4
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 436 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 604 KB Output is correct
10 Correct 1 ms 608 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 1 ms 604 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 16 ms 6072 KB Output is correct
16 Correct 9 ms 3288 KB Output is correct
17 Correct 8 ms 3544 KB Output is correct
18 Correct 9 ms 4312 KB Output is correct
19 Correct 13 ms 6868 KB Output is correct
20 Correct 157 ms 29648 KB Output is correct
21 Correct 1008 ms 267608 KB Output is correct
22 Correct 1014 ms 267144 KB Output is correct
23 Correct 511 ms 125840 KB Output is correct
24 Correct 980 ms 270252 KB Output is correct
25 Correct 614 ms 131716 KB Output is correct
26 Correct 648 ms 163984 KB Output is correct
27 Correct 657 ms 154236 KB Output is correct
28 Correct 881 ms 262020 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 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 0 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 0 ms 604 KB Output is correct
12 Correct 12 ms 6104 KB Output is correct
13 Correct 8 ms 3288 KB Output is correct
14 Correct 8 ms 3284 KB Output is correct
15 Correct 157 ms 32512 KB Output is correct
16 Correct 519 ms 123224 KB Output is correct
17 Correct 956 ms 231832 KB Output is correct
18 Correct 986 ms 221556 KB Output is correct
19 Correct 868 ms 230280 KB Output is correct
20 Correct 555 ms 123800 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 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 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 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 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 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 600 KB Output is correct
27 Correct 0 ms 604 KB Output is correct
28 Correct 1 ms 604 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 1 ms 604 KB Output is correct
31 Correct 1 ms 604 KB Output is correct
32 Correct 1 ms 604 KB Output is correct
33 Correct 1 ms 604 KB Output is correct
34 Correct 1 ms 604 KB Output is correct
35 Correct 1 ms 604 KB Output is correct
36 Correct 1 ms 604 KB Output is correct
37 Correct 1 ms 604 KB Output is correct
38 Correct 0 ms 604 KB Output is correct
39 Correct 14 ms 6872 KB Output is correct
40 Correct 13 ms 7124 KB Output is correct
41 Correct 14 ms 6032 KB Output is correct
42 Correct 10 ms 3288 KB Output is correct
43 Correct 8 ms 3796 KB Output is correct
44 Correct 10 ms 4316 KB Output is correct
45 Correct 10 ms 4156 KB Output is correct
46 Correct 10 ms 4284 KB Output is correct
47 Correct 13 ms 6876 KB Output is correct
48 Correct 14 ms 6872 KB Output is correct
49 Correct 11 ms 6936 KB Output is correct
50 Correct 8 ms 3288 KB Output is correct
51 Correct 0 ms 348 KB Output is correct
52 Correct 0 ms 348 KB Output is correct
53 Correct 0 ms 348 KB Output is correct
54 Correct 0 ms 348 KB Output is correct
55 Correct 0 ms 436 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 0 ms 348 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 0 ms 604 KB Output is correct
60 Correct 1 ms 608 KB Output is correct
61 Correct 1 ms 604 KB Output is correct
62 Correct 1 ms 604 KB Output is correct
63 Correct 1 ms 604 KB Output is correct
64 Correct 1 ms 604 KB Output is correct
65 Correct 16 ms 6072 KB Output is correct
66 Correct 9 ms 3288 KB Output is correct
67 Correct 8 ms 3544 KB Output is correct
68 Correct 9 ms 4312 KB Output is correct
69 Correct 13 ms 6868 KB Output is correct
70 Correct 157 ms 29648 KB Output is correct
71 Correct 1008 ms 267608 KB Output is correct
72 Correct 1014 ms 267144 KB Output is correct
73 Correct 511 ms 125840 KB Output is correct
74 Correct 980 ms 270252 KB Output is correct
75 Correct 614 ms 131716 KB Output is correct
76 Correct 648 ms 163984 KB Output is correct
77 Correct 657 ms 154236 KB Output is correct
78 Correct 881 ms 262020 KB Output is correct
79 Correct 0 ms 344 KB Output is correct
80 Correct 0 ms 348 KB Output is correct
81 Correct 0 ms 348 KB Output is correct
82 Correct 0 ms 348 KB Output is correct
83 Correct 0 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 0 ms 604 KB Output is correct
88 Correct 1 ms 604 KB Output is correct
89 Correct 0 ms 604 KB Output is correct
90 Correct 12 ms 6104 KB Output is correct
91 Correct 8 ms 3288 KB Output is correct
92 Correct 8 ms 3284 KB Output is correct
93 Correct 157 ms 32512 KB Output is correct
94 Correct 519 ms 123224 KB Output is correct
95 Correct 956 ms 231832 KB Output is correct
96 Correct 986 ms 221556 KB Output is correct
97 Correct 868 ms 230280 KB Output is correct
98 Correct 555 ms 123800 KB Output is correct
99 Correct 998 ms 267604 KB Output is correct
100 Correct 1066 ms 267148 KB Output is correct
101 Correct 1038 ms 268200 KB Output is correct
102 Correct 1043 ms 268428 KB Output is correct
103 Correct 713 ms 161160 KB Output is correct
104 Correct 908 ms 257188 KB Output is correct
105 Correct 664 ms 266628 KB Output is correct