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Submission #1105226

# Submission time Handle Problem Language Result Execution time Memory
1105226 2024-10-25T18:46:57 Z alexdd Fire (BOI24_fire) C++17
40 / 100
 2000 ms 2664 KB 
#include <bits/stdc++.h>
using namespace std;
const int INF = 1e9;
int n,m;
pair<int,int> v[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++)
    {
        int mxm=v[i].second;
        nxt[i]=-1;
        for(int j=1;j<=get_ult(v[i].second);j++)
        {
            if(v[j].second > mxm)
            {
                mxm = v[j].second;
                nxt[i] = j;
            }
        }
        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);
    calc_nxt();
    int rez=INF;
    for(int i=1;i<=n;i++)
    {
        if(v[i].second >= m)
        {
            int unde=-1,mxm=-1;
            for(int j=1;j<=get_ult(v[i].second-m);j++)
            {
                if(v[j].second > mxm)
                {
                    mxm = v[j].second;
                    unde = j;
                }
            }
            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 2568 KB Output is correct
5 Correct 2 ms 2556 KB Output is correct
6 Correct 1 ms 2384 KB Output is correct
7 Correct 1 ms 2552 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 2552 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 2568 KB Output is correct
5 Correct 2 ms 2556 KB Output is correct
6 Correct 1 ms 2384 KB Output is correct
7 Correct 1 ms 2552 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 2552 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 2384 KB Output is correct
29 Correct 2 ms 2384 KB Output is correct
30 Correct 2 ms 2384 KB Output is correct
31 Correct 2 ms 2384 KB Output is correct
32 Correct 1 ms 2384 KB Output is correct
33 Correct 2 ms 2384 KB Output is correct
34 Correct 2 ms 2384 KB Output is correct
35 Correct 1 ms 2384 KB Output is correct
36 Correct 2 ms 2384 KB Output is correct
37 Correct 1 ms 2384 KB Output is correct
38 Correct 2 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 2568 KB Output is correct
5 Correct 2 ms 2556 KB Output is correct
6 Correct 1 ms 2384 KB Output is correct
7 Correct 1 ms 2552 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 2552 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 2384 KB Output is correct
29 Correct 2 ms 2384 KB Output is correct
30 Correct 2 ms 2384 KB Output is correct
31 Correct 2 ms 2384 KB Output is correct
32 Correct 1 ms 2384 KB Output is correct
33 Correct 2 ms 2384 KB Output is correct
34 Correct 2 ms 2384 KB Output is correct
35 Correct 1 ms 2384 KB Output is correct
36 Correct 2 ms 2384 KB Output is correct
37 Correct 1 ms 2384 KB Output is correct
38 Correct 2 ms 2384 KB Output is correct
39 Correct 122 ms 2384 KB Output is correct
40 Correct 120 ms 2384 KB Output is correct
41 Correct 132 ms 2384 KB Output is correct
42 Correct 119 ms 2384 KB Output is correct
43 Correct 171 ms 2500 KB Output is correct
44 Correct 121 ms 2384 KB Output is correct
45 Correct 118 ms 2500 KB Output is correct
46 Correct 136 ms 2488 KB Output is correct
47 Correct 120 ms 2384 KB Output is correct
48 Correct 119 ms 2664 KB Output is correct
49 Correct 119 ms 2384 KB Output is correct
50 Correct 119 ms 2492 KB Output is correct

Subtask #4
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 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 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 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 134 ms 2384 KB Output is correct
16 Correct 118 ms 2504 KB Output is correct
17 Correct 171 ms 2500 KB Output is correct
18 Correct 119 ms 2552 KB Output is correct
19 Correct 119 ms 2504 KB Output is correct
20 Execution timed out 2044 ms 2596 KB Time limit exceeded
21 Halted 0 ms 0 KB -

Subtask #5
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 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 2 ms 2384 KB Output is correct
9 Correct 1 ms 2384 KB Output is correct
10 Correct 2 ms 2384 KB Output is correct
11 Correct 1 ms 2384 KB Output is correct
12 Correct 131 ms 2496 KB Output is correct
13 Correct 118 ms 2384 KB Output is correct
14 Correct 119 ms 2384 KB Output is correct
15 Execution timed out 2084 ms 2596 KB Time limit exceeded
16 Halted 0 ms 0 KB -

Subtask #6
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 2568 KB Output is correct
5 Correct 2 ms 2556 KB Output is correct
6 Correct 1 ms 2384 KB Output is correct
7 Correct 1 ms 2552 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 2552 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 2384 KB Output is correct
29 Correct 2 ms 2384 KB Output is correct
30 Correct 2 ms 2384 KB Output is correct
31 Correct 2 ms 2384 KB Output is correct
32 Correct 1 ms 2384 KB Output is correct
33 Correct 2 ms 2384 KB Output is correct
34 Correct 2 ms 2384 KB Output is correct
35 Correct 1 ms 2384 KB Output is correct
36 Correct 2 ms 2384 KB Output is correct
37 Correct 1 ms 2384 KB Output is correct
38 Correct 2 ms 2384 KB Output is correct
39 Correct 122 ms 2384 KB Output is correct
40 Correct 120 ms 2384 KB Output is correct
41 Correct 132 ms 2384 KB Output is correct
42 Correct 119 ms 2384 KB Output is correct
43 Correct 171 ms 2500 KB Output is correct
44 Correct 121 ms 2384 KB Output is correct
45 Correct 118 ms 2500 KB Output is correct
46 Correct 136 ms 2488 KB Output is correct
47 Correct 120 ms 2384 KB Output is correct
48 Correct 119 ms 2664 KB Output is correct
49 Correct 119 ms 2384 KB Output is correct
50 Correct 119 ms 2492 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 2552 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 2384 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 2384 KB Output is correct
65 Correct 134 ms 2384 KB Output is correct
66 Correct 118 ms 2504 KB Output is correct
67 Correct 171 ms 2500 KB Output is correct
68 Correct 119 ms 2552 KB Output is correct
69 Correct 119 ms 2504 KB Output is correct
70 Execution timed out 2044 ms 2596 KB Time limit exceeded
71 Halted 0 ms 0 KB -