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Submission #1105230

# Submission time Handle Problem Language Result Execution time Memory
1105230 2024-10-25T18:51:32 Z alexdd Fire (BOI24_fire) C++17
100 / 100
 138 ms 7340 KB 
#include <bits/stdc++.h>
using namespace std;
const int INF = 1e9;
int n,m;
pair<int,int> v[200005];
int prefmax[200005];
int nxt[200005];
int get_ult(int lim)
{
    int st=0,dr=n,ans=0;
    while(st<=dr)
    {
        int mij=(st+dr)/2;
        if(v[mij].first <= lim)
        {
            ans = mij;
            st = mij+1;
        }
        else
            dr = mij-1;
    }
    return ans;
}
void calc_nxt()
{
    for(int i=1;i<=n;i++)
    {
        nxt[i] = prefmax[get_ult(v[i].second)];
        if(nxt[i]==i) nxt[i] = -1;
        //cout<<i<<" "<<nxt[i]<<" nxt\n";
    }
}
int main()
{
    cin>>n>>m;
    for(int i=1;i<=n;i++)
    {
        cin>>v[i].first>>v[i].second;
        if(v[i].first > v[i].second)
            v[i].second += m;
    }
    sort(v+1,v+1+n);
    prefmax[0] = -1;
    for(int i=1;i<=n;i++)
    {
        if(prefmax[i-1]==-1 || v[i].second > v[prefmax[i-1]].second)
            prefmax[i] = i;
        else
            prefmax[i] = prefmax[i-1];
    }
    calc_nxt();
    int rez=INF;
    for(int i=1;i<=n;i++)
    {
        if(v[i].second >= m)
        {
            int unde = prefmax[get_ult(v[i].second-m)];
            if(unde==i) unde = -1;

            int cur=unde,cnt=1;
            while(cur!=-1)
            {
                cnt++;
                if(v[cur].second >= v[i].first)
                    break;
                cur = nxt[cur];
            }
            if(cur!=-1) rez = min(rez, cnt);
        }
    }
    if(rez==INF)
        rez=-1;
    cout<<rez;
    return 0;
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2384 KB Output is correct
2 Correct 1 ms 2384 KB Output is correct
3 Correct 1 ms 2384 KB Output is correct
4 Correct 1 ms 2384 KB Output is correct
5 Correct 1 ms 2384 KB Output is correct
6 Correct 1 ms 2552 KB Output is correct
7 Correct 1 ms 2384 KB Output is correct
8 Correct 1 ms 2384 KB Output is correct
9 Correct 1 ms 2384 KB Output is correct
10 Correct 1 ms 2384 KB Output is correct
11 Correct 1 ms 2384 KB Output is correct
12 Correct 1 ms 2384 KB Output is correct
13 Correct 1 ms 2384 KB Output is correct
14 Correct 1 ms 2384 KB Output is correct
15 Correct 1 ms 2384 KB Output is correct
16 Correct 1 ms 2384 KB Output is correct
17 Correct 1 ms 2384 KB Output is correct
18 Correct 1 ms 2384 KB Output is correct
19 Correct 1 ms 2384 KB Output is correct
20 Correct 1 ms 2384 KB Output is correct
21 Correct 1 ms 2384 KB Output is correct
22 Correct 1 ms 2384 KB Output is correct
23 Correct 1 ms 2384 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2384 KB Output is correct
2 Correct 1 ms 2384 KB Output is correct
3 Correct 1 ms 2384 KB Output is correct
4 Correct 1 ms 2384 KB Output is correct
5 Correct 1 ms 2384 KB Output is correct
6 Correct 1 ms 2552 KB Output is correct
7 Correct 1 ms 2384 KB Output is correct
8 Correct 1 ms 2384 KB Output is correct
9 Correct 1 ms 2384 KB Output is correct
10 Correct 1 ms 2384 KB Output is correct
11 Correct 1 ms 2384 KB Output is correct
12 Correct 1 ms 2384 KB Output is correct
13 Correct 1 ms 2384 KB Output is correct
14 Correct 1 ms 2384 KB Output is correct
15 Correct 1 ms 2384 KB Output is correct
16 Correct 1 ms 2384 KB Output is correct
17 Correct 1 ms 2384 KB Output is correct
18 Correct 1 ms 2384 KB Output is correct
19 Correct 1 ms 2384 KB Output is correct
20 Correct 1 ms 2384 KB Output is correct
21 Correct 1 ms 2384 KB Output is correct
22 Correct 1 ms 2384 KB Output is correct
23 Correct 1 ms 2384 KB Output is correct
24 Correct 1 ms 2384 KB Output is correct
25 Correct 1 ms 2384 KB Output is correct
26 Correct 1 ms 2384 KB Output is correct
27 Correct 1 ms 2384 KB Output is correct
28 Correct 1 ms 2556 KB Output is correct
29 Correct 1 ms 2384 KB Output is correct
30 Correct 1 ms 2384 KB Output is correct
31 Correct 1 ms 2384 KB Output is correct
32 Correct 1 ms 2384 KB Output is correct
33 Correct 1 ms 2384 KB Output is correct
34 Correct 1 ms 2384 KB Output is correct
35 Correct 1 ms 2384 KB Output is correct
36 Correct 1 ms 2384 KB Output is correct
37 Correct 1 ms 2384 KB Output is correct
38 Correct 1 ms 2384 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2384 KB Output is correct
2 Correct 1 ms 2384 KB Output is correct
3 Correct 1 ms 2384 KB Output is correct
4 Correct 1 ms 2384 KB Output is correct
5 Correct 1 ms 2384 KB Output is correct
6 Correct 1 ms 2552 KB Output is correct
7 Correct 1 ms 2384 KB Output is correct
8 Correct 1 ms 2384 KB Output is correct
9 Correct 1 ms 2384 KB Output is correct
10 Correct 1 ms 2384 KB Output is correct
11 Correct 1 ms 2384 KB Output is correct
12 Correct 1 ms 2384 KB Output is correct
13 Correct 1 ms 2384 KB Output is correct
14 Correct 1 ms 2384 KB Output is correct
15 Correct 1 ms 2384 KB Output is correct
16 Correct 1 ms 2384 KB Output is correct
17 Correct 1 ms 2384 KB Output is correct
18 Correct 1 ms 2384 KB Output is correct
19 Correct 1 ms 2384 KB Output is correct
20 Correct 1 ms 2384 KB Output is correct
21 Correct 1 ms 2384 KB Output is correct
22 Correct 1 ms 2384 KB Output is correct
23 Correct 1 ms 2384 KB Output is correct
24 Correct 1 ms 2384 KB Output is correct
25 Correct 1 ms 2384 KB Output is correct
26 Correct 1 ms 2384 KB Output is correct
27 Correct 1 ms 2384 KB Output is correct
28 Correct 1 ms 2556 KB Output is correct
29 Correct 1 ms 2384 KB Output is correct
30 Correct 1 ms 2384 KB Output is correct
31 Correct 1 ms 2384 KB Output is correct
32 Correct 1 ms 2384 KB Output is correct
33 Correct 1 ms 2384 KB Output is correct
34 Correct 1 ms 2384 KB Output is correct
35 Correct 1 ms 2384 KB Output is correct
36 Correct 1 ms 2384 KB Output is correct
37 Correct 1 ms 2384 KB Output is correct
38 Correct 1 ms 2384 KB Output is correct
39 Correct 4 ms 2384 KB Output is correct
40 Correct 4 ms 2496 KB Output is correct
41 Correct 4 ms 2384 KB Output is correct
42 Correct 3 ms 2384 KB Output is correct
43 Correct 4 ms 2384 KB Output is correct
44 Correct 4 ms 2384 KB Output is correct
45 Correct 4 ms 2384 KB Output is correct
46 Correct 4 ms 2492 KB Output is correct
47 Correct 4 ms 2384 KB Output is correct
48 Correct 4 ms 2384 KB Output is correct
49 Correct 3 ms 2384 KB Output is correct
50 Correct 3 ms 2384 KB Output is correct

Subtask #4
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2384 KB Output is correct
2 Correct 1 ms 2384 KB Output is correct
3 Correct 1 ms 2384 KB Output is correct
4 Correct 1 ms 2384 KB Output is correct
5 Correct 1 ms 2384 KB Output is correct
6 Correct 1 ms 2384 KB Output is correct
7 Correct 1 ms 2384 KB Output is correct
8 Correct 1 ms 2384 KB Output is correct
9 Correct 1 ms 2384 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2384 KB Output is correct
12 Correct 1 ms 2384 KB Output is correct
13 Correct 1 ms 2384 KB Output is correct
14 Correct 1 ms 2500 KB Output is correct
15 Correct 4 ms 2384 KB Output is correct
16 Correct 3 ms 2384 KB Output is correct
17 Correct 4 ms 2384 KB Output is correct
18 Correct 4 ms 2384 KB Output is correct
19 Correct 4 ms 2384 KB Output is correct
20 Correct 43 ms 3520 KB Output is correct
21 Correct 129 ms 3400 KB Output is correct
22 Correct 138 ms 3400 KB Output is correct
23 Correct 109 ms 3400 KB Output is correct
24 Correct 123 ms 3404 KB Output is correct
25 Correct 117 ms 3400 KB Output is correct
26 Correct 132 ms 3400 KB Output is correct
27 Correct 119 ms 3400 KB Output is correct
28 Correct 117 ms 3400 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2384 KB Output is correct
2 Correct 1 ms 2384 KB Output is correct
3 Correct 1 ms 2552 KB Output is correct
4 Correct 1 ms 2384 KB Output is correct
5 Correct 1 ms 2384 KB Output is correct
6 Correct 1 ms 2556 KB Output is correct
7 Correct 1 ms 2384 KB Output is correct
8 Correct 1 ms 2384 KB Output is correct
9 Correct 1 ms 2384 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2384 KB Output is correct
12 Correct 4 ms 2384 KB Output is correct
13 Correct 3 ms 2384 KB Output is correct
14 Correct 3 ms 2384 KB Output is correct
15 Correct 43 ms 3520 KB Output is correct
16 Correct 102 ms 6216 KB Output is correct
17 Correct 122 ms 7240 KB Output is correct
18 Correct 129 ms 7240 KB Output is correct
19 Correct 122 ms 7208 KB Output is correct
20 Correct 101 ms 6440 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2384 KB Output is correct
2 Correct 1 ms 2384 KB Output is correct
3 Correct 1 ms 2384 KB Output is correct
4 Correct 1 ms 2384 KB Output is correct
5 Correct 1 ms 2384 KB Output is correct
6 Correct 1 ms 2552 KB Output is correct
7 Correct 1 ms 2384 KB Output is correct
8 Correct 1 ms 2384 KB Output is correct
9 Correct 1 ms 2384 KB Output is correct
10 Correct 1 ms 2384 KB Output is correct
11 Correct 1 ms 2384 KB Output is correct
12 Correct 1 ms 2384 KB Output is correct
13 Correct 1 ms 2384 KB Output is correct
14 Correct 1 ms 2384 KB Output is correct
15 Correct 1 ms 2384 KB Output is correct
16 Correct 1 ms 2384 KB Output is correct
17 Correct 1 ms 2384 KB Output is correct
18 Correct 1 ms 2384 KB Output is correct
19 Correct 1 ms 2384 KB Output is correct
20 Correct 1 ms 2384 KB Output is correct
21 Correct 1 ms 2384 KB Output is correct
22 Correct 1 ms 2384 KB Output is correct
23 Correct 1 ms 2384 KB Output is correct
24 Correct 1 ms 2384 KB Output is correct
25 Correct 1 ms 2384 KB Output is correct
26 Correct 1 ms 2384 KB Output is correct
27 Correct 1 ms 2384 KB Output is correct
28 Correct 1 ms 2556 KB Output is correct
29 Correct 1 ms 2384 KB Output is correct
30 Correct 1 ms 2384 KB Output is correct
31 Correct 1 ms 2384 KB Output is correct
32 Correct 1 ms 2384 KB Output is correct
33 Correct 1 ms 2384 KB Output is correct
34 Correct 1 ms 2384 KB Output is correct
35 Correct 1 ms 2384 KB Output is correct
36 Correct 1 ms 2384 KB Output is correct
37 Correct 1 ms 2384 KB Output is correct
38 Correct 1 ms 2384 KB Output is correct
39 Correct 4 ms 2384 KB Output is correct
40 Correct 4 ms 2496 KB Output is correct
41 Correct 4 ms 2384 KB Output is correct
42 Correct 3 ms 2384 KB Output is correct
43 Correct 4 ms 2384 KB Output is correct
44 Correct 4 ms 2384 KB Output is correct
45 Correct 4 ms 2384 KB Output is correct
46 Correct 4 ms 2492 KB Output is correct
47 Correct 4 ms 2384 KB Output is correct
48 Correct 4 ms 2384 KB Output is correct
49 Correct 3 ms 2384 KB Output is correct
50 Correct 3 ms 2384 KB Output is correct
51 Correct 1 ms 2384 KB Output is correct
52 Correct 1 ms 2384 KB Output is correct
53 Correct 1 ms 2384 KB Output is correct
54 Correct 1 ms 2384 KB Output is correct
55 Correct 1 ms 2384 KB Output is correct
56 Correct 1 ms 2384 KB Output is correct
57 Correct 1 ms 2384 KB Output is correct
58 Correct 1 ms 2384 KB Output is correct
59 Correct 1 ms 2384 KB Output is correct
60 Correct 1 ms 2396 KB Output is correct
61 Correct 1 ms 2384 KB Output is correct
62 Correct 1 ms 2384 KB Output is correct
63 Correct 1 ms 2384 KB Output is correct
64 Correct 1 ms 2500 KB Output is correct
65 Correct 4 ms 2384 KB Output is correct
66 Correct 3 ms 2384 KB Output is correct
67 Correct 4 ms 2384 KB Output is correct
68 Correct 4 ms 2384 KB Output is correct
69 Correct 4 ms 2384 KB Output is correct
70 Correct 43 ms 3520 KB Output is correct
71 Correct 129 ms 3400 KB Output is correct
72 Correct 138 ms 3400 KB Output is correct
73 Correct 109 ms 3400 KB Output is correct
74 Correct 123 ms 3404 KB Output is correct
75 Correct 117 ms 3400 KB Output is correct
76 Correct 132 ms 3400 KB Output is correct
77 Correct 119 ms 3400 KB Output is correct
78 Correct 117 ms 3400 KB Output is correct
79 Correct 1 ms 2384 KB Output is correct
80 Correct 1 ms 2384 KB Output is correct
81 Correct 1 ms 2552 KB Output is correct
82 Correct 1 ms 2384 KB Output is correct
83 Correct 1 ms 2384 KB Output is correct
84 Correct 1 ms 2556 KB Output is correct
85 Correct 1 ms 2384 KB Output is correct
86 Correct 1 ms 2384 KB Output is correct
87 Correct 1 ms 2384 KB Output is correct
88 Correct 1 ms 2396 KB Output is correct
89 Correct 1 ms 2384 KB Output is correct
90 Correct 4 ms 2384 KB Output is correct
91 Correct 3 ms 2384 KB Output is correct
92 Correct 3 ms 2384 KB Output is correct
93 Correct 43 ms 3520 KB Output is correct
94 Correct 102 ms 6216 KB Output is correct
95 Correct 122 ms 7240 KB Output is correct
96 Correct 129 ms 7240 KB Output is correct
97 Correct 122 ms 7208 KB Output is correct
98 Correct 101 ms 6440 KB Output is correct
99 Correct 121 ms 7248 KB Output is correct
100 Correct 124 ms 7200 KB Output is correct
101 Correct 122 ms 7240 KB Output is correct
102 Correct 130 ms 7240 KB Output is correct
103 Correct 128 ms 7340 KB Output is correct
104 Correct 130 ms 7240 KB Output is correct
105 Correct 99 ms 6188 KB Output is correct