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Submission #306001

# Submission time Handle Problem Language Result Execution time Memory
306001 2020-09-24T09:21:22 Z vipghn2003 Rice Hub (IOI11_ricehub) C++14
68 / 100
 1000 ms 2944 KB 
#include<bits/stdc++.h>

using namespace std;

const int N=1e5+5;
int a[N];
long long s[N];

long long cost(int i,int l,int r)
{
    if(l>r) return 0;
    return 1ll*a[i]*(i-l)-(s[i-1]-s[l-1])+(s[r]-s[i])-1ll*a[i]*(r-i);
}

int besthub(int R,int L,int X[],long long B)
{
    for(int i=1;i<=R;i++)
    {
        a[i]=X[i-1];
        s[i]=s[i-1]+a[i];
    }
    int ans=0;
    for(int i=1;i<=R;i++)
    {
        int pos=a[i];
        int l=i,r=R,res=-1;
        while(l<=r)
        {
            int mid=(l+r)/2;
            int v=mid;
            int need=pos-(a[mid]-pos);
            int u=upper_bound(a+1,a+R+1,need)-a;
            if(cost(i,u,v)<=B)
            {
                res=mid;
                l=mid+1;
            }
            else r=mid-1;
        }
        int need=pos-(a[res]-pos);
        int u=upper_bound(a+1,a+R+1,need)-a;
        long long cur=B-cost(i,u,res);
        //if(i==4) cout<<i<<' '<<u<<' '<<res<<' '<<cost(i,u,res)<<'\n';
        u--;
        while(u>=1&&cur-(pos-a[u])>=0)
        {
            cur=cur-(pos-a[u]);
            u--;
        }
        //cout<<i<<' '<<res<<' '<<u<<'\n';
        ans=max(ans,res-u);
    }
    return ans;
}
/*
int main()
{
    int R,L,B;
    cin>>R>>L>>B;
    int pos[R];
    for(int i=0;i<R;i++) cin>>pos[i];
    cout<<besthub(R,L,pos,B);
}
5 20 6
1
2
10
12
14
*/

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 384 KB Output is correct
22 Correct 1 ms 384 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 1 ms 384 KB Output is correct

Subtask #3
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 3 ms 384 KB Output is correct
22 Correct 3 ms 384 KB Output is correct
23 Correct 10 ms 384 KB Output is correct
24 Correct 9 ms 384 KB Output is correct
25 Correct 9 ms 384 KB Output is correct
26 Correct 12 ms 384 KB Output is correct
27 Correct 8 ms 384 KB Output is correct
28 Correct 8 ms 512 KB Output is correct

Subtask #4
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 640 KB Output is correct
2 Correct 22 ms 768 KB Output is correct
3 Execution timed out 1086 ms 2944 KB Time limit exceeded
4 Halted 0 ms 0 KB -