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Submission #123042

# Submission time Handle Problem Language Result Execution time Memory
123042 2019-06-30T05:44:29 Z semiauto Global Warming (CEOI18_glo) C++14
100 / 100
 656 ms 9156 KB 
#include <bits/stdc++.h>
using namespace std;
int n,d,i,k,N=1,ans;
int mas[200001],num[200001],tree[530000],pdp[200001],sdp[200001];
pair <int,int> hey[200001];
int go(int x) {
    int i,pos=0;
    for (i=17;i>=0;i--) {
        if (pos+(1<<i)>n)
            continue;
        if (hey[pos+(1<<i)].first<x)
            pos+=(1<<i);
    }
    return num[hey[pos].second];
}
int gogo(int x) {
    int i,pos=0;
    for (i=17;i>=0;i--) {
        if (pos+(1<<i)>n)
            continue;
        if (hey[pos+(1<<i)].first<=x)
            pos+=(1<<i);
    }
    if (pos==n)
        return n+1;
    return num[hey[pos+1].second];
}
void update(int pos,int val) {
    pos+=N-1;
    while (pos) {
        tree[pos]=max(tree[pos],val);
        pos/=2;
    }
}
int solve(int p,int l,int r,int x,int y) {
    if (x>r || l>y)
        return 0;
    if (l>=x && r<=y)
        return tree[p];
    return max(solve(2*p,l,(l+r)/2,x,y),solve(2*p+1,(l+r)/2+1,r,x,y));
}
int main() {
    cin>>n>>d;
    while (N<n)
        N*=2;
    for (i=1;i<=n;i++) {
        cin>>mas[i];
        hey[i]={mas[i],i};
    }
    sort(hey+1,hey+n+1);
    for (i=1;i<=n;i++) {
        if (hey[i].first>hey[i-1].first)
            k++;
        num[hey[i].second]=k;
    }
    for (i=1;i<=n;i++) {
        pdp[i]=solve(1,N,2*N-1,N,N-1+num[i]-1)+1;
        update(num[i],pdp[i]);
    }
    for (i=1;i<530000;i++)
        tree[i]=0;
    for (i=n;i>0;i--) {
        sdp[i]=solve(1,N,2*N-1,N+num[i],2*N-1)+1;
        update(num[i],sdp[i]);
    }
    for (i=1;i<530000;i++)
        tree[i]=0;
    for (i=1;i<=n;i++) {
        ans=max(ans,solve(1,N,2*N-1,N,N-1+go(mas[i]+d))+sdp[i]);
        update(num[i],pdp[i]);
    }
     for (i=1;i<530000;i++)
        tree[i]=0;
    for (i=n;i>0;i--) {
        ans=max(ans,solve(1,N,2*N-1,N-1+gogo(mas[i]-d),2*N-1)+pdp[i]);
        update(num[i],sdp[i]);
    }
    cout<<ans<<endl;
  	return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2424 KB Output is correct
2 Correct 4 ms 2424 KB Output is correct
3 Correct 4 ms 2424 KB Output is correct
4 Correct 4 ms 2424 KB Output is correct
5 Correct 5 ms 2424 KB Output is correct
6 Correct 4 ms 2424 KB Output is correct
7 Correct 4 ms 2552 KB Output is correct
8 Correct 4 ms 2424 KB Output is correct
9 Correct 4 ms 2424 KB Output is correct
10 Correct 4 ms 2424 KB Output is correct
11 Correct 4 ms 2424 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2424 KB Output is correct
2 Correct 4 ms 2424 KB Output is correct
3 Correct 4 ms 2424 KB Output is correct
4 Correct 4 ms 2424 KB Output is correct
5 Correct 5 ms 2424 KB Output is correct
6 Correct 4 ms 2424 KB Output is correct
7 Correct 4 ms 2552 KB Output is correct
8 Correct 4 ms 2424 KB Output is correct
9 Correct 4 ms 2424 KB Output is correct
10 Correct 4 ms 2424 KB Output is correct
11 Correct 4 ms 2424 KB Output is correct
12 Correct 4 ms 2424 KB Output is correct
13 Correct 4 ms 2424 KB Output is correct
14 Correct 4 ms 2424 KB Output is correct
15 Correct 4 ms 2424 KB Output is correct
16 Correct 4 ms 2424 KB Output is correct
17 Correct 4 ms 2424 KB Output is correct
18 Correct 4 ms 2424 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2424 KB Output is correct
2 Correct 4 ms 2424 KB Output is correct
3 Correct 4 ms 2424 KB Output is correct
4 Correct 4 ms 2424 KB Output is correct
5 Correct 5 ms 2424 KB Output is correct
6 Correct 4 ms 2424 KB Output is correct
7 Correct 4 ms 2552 KB Output is correct
8 Correct 4 ms 2424 KB Output is correct
9 Correct 4 ms 2424 KB Output is correct
10 Correct 4 ms 2424 KB Output is correct
11 Correct 4 ms 2424 KB Output is correct
12 Correct 4 ms 2424 KB Output is correct
13 Correct 4 ms 2424 KB Output is correct
14 Correct 4 ms 2424 KB Output is correct
15 Correct 4 ms 2424 KB Output is correct
16 Correct 4 ms 2424 KB Output is correct
17 Correct 4 ms 2424 KB Output is correct
18 Correct 4 ms 2424 KB Output is correct
19 Correct 5 ms 2424 KB Output is correct
20 Correct 6 ms 2424 KB Output is correct
21 Correct 5 ms 2424 KB Output is correct
22 Correct 6 ms 2460 KB Output is correct
23 Correct 5 ms 2424 KB Output is correct
24 Correct 5 ms 2456 KB Output is correct
25 Correct 6 ms 2428 KB Output is correct
26 Correct 5 ms 2424 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 539 ms 9100 KB Output is correct
2 Correct 635 ms 9052 KB Output is correct
3 Correct 548 ms 9156 KB Output is correct
4 Correct 557 ms 9068 KB Output is correct
5 Correct 303 ms 8312 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 117 ms 4064 KB Output is correct
2 Correct 115 ms 4124 KB Output is correct
3 Correct 113 ms 4088 KB Output is correct
4 Correct 67 ms 3960 KB Output is correct
5 Correct 4 ms 2424 KB Output is correct
6 Correct 66 ms 3832 KB Output is correct
7 Correct 91 ms 4216 KB Output is correct

Subtask #6
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 164 ms 5692 KB Output is correct
2 Correct 164 ms 5752 KB Output is correct
3 Correct 352 ms 9104 KB Output is correct
4 Correct 262 ms 8184 KB Output is correct
5 Correct 118 ms 5368 KB Output is correct
6 Correct 235 ms 8056 KB Output is correct
7 Correct 280 ms 8696 KB Output is correct
8 Correct 155 ms 5880 KB Output is correct

Subtask #7
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2424 KB Output is correct
2 Correct 4 ms 2424 KB Output is correct
3 Correct 4 ms 2424 KB Output is correct
4 Correct 4 ms 2424 KB Output is correct
5 Correct 5 ms 2424 KB Output is correct
6 Correct 4 ms 2424 KB Output is correct
7 Correct 4 ms 2552 KB Output is correct
8 Correct 4 ms 2424 KB Output is correct
9 Correct 4 ms 2424 KB Output is correct
10 Correct 4 ms 2424 KB Output is correct
11 Correct 4 ms 2424 KB Output is correct
12 Correct 4 ms 2424 KB Output is correct
13 Correct 4 ms 2424 KB Output is correct
14 Correct 4 ms 2424 KB Output is correct
15 Correct 4 ms 2424 KB Output is correct
16 Correct 4 ms 2424 KB Output is correct
17 Correct 4 ms 2424 KB Output is correct
18 Correct 4 ms 2424 KB Output is correct
19 Correct 5 ms 2424 KB Output is correct
20 Correct 6 ms 2424 KB Output is correct
21 Correct 5 ms 2424 KB Output is correct
22 Correct 6 ms 2460 KB Output is correct
23 Correct 5 ms 2424 KB Output is correct
24 Correct 5 ms 2456 KB Output is correct
25 Correct 6 ms 2428 KB Output is correct
26 Correct 5 ms 2424 KB Output is correct
27 Correct 539 ms 9100 KB Output is correct
28 Correct 635 ms 9052 KB Output is correct
29 Correct 548 ms 9156 KB Output is correct
30 Correct 557 ms 9068 KB Output is correct
31 Correct 303 ms 8312 KB Output is correct
32 Correct 117 ms 4064 KB Output is correct
33 Correct 115 ms 4124 KB Output is correct
34 Correct 113 ms 4088 KB Output is correct
35 Correct 67 ms 3960 KB Output is correct
36 Correct 4 ms 2424 KB Output is correct
37 Correct 66 ms 3832 KB Output is correct
38 Correct 91 ms 4216 KB Output is correct
39 Correct 164 ms 5692 KB Output is correct
40 Correct 164 ms 5752 KB Output is correct
41 Correct 352 ms 9104 KB Output is correct
42 Correct 262 ms 8184 KB Output is correct
43 Correct 118 ms 5368 KB Output is correct
44 Correct 235 ms 8056 KB Output is correct
45 Correct 280 ms 8696 KB Output is correct
46 Correct 155 ms 5880 KB Output is correct
47 Correct 236 ms 5672 KB Output is correct
48 Correct 251 ms 5752 KB Output is correct
49 Correct 656 ms 9004 KB Output is correct
50 Correct 303 ms 8404 KB Output is correct
51 Correct 208 ms 6904 KB Output is correct
52 Correct 318 ms 8440 KB Output is correct
53 Correct 241 ms 8312 KB Output is correct
54 Correct 282 ms 9068 KB Output is correct
55 Correct 431 ms 9028 KB Output is correct