oj.uz

Submission #83689

# Submission time Handle Problem Language Result Execution time Memory
83689 2018-11-09T21:19:57 Z Bodo171 Watching (JOI13_watching) C++14
100 / 100
 211 ms 16336 KB 
#include <iostream>
#include <fstream>
#include <algorithm>
using namespace std;
const int nmax=2005;
int dp[nmax][nmax];
int v[nmax];
int n,p,q,i,j,p1,p2,val;
bool check(int val)
{
    for(i=1;i<=n;i++)
        for(j=0;j<=p;j++)
           dp[i][j]=q+1;
    p1=p2=1;
    for(i=1;i<=n;i++)
    {
        while(v[i]-v[p1]+1>val)
            p1++;
        while(v[i]-v[p2]+1>2*val)
            p2++;
        for(j=1;j<=p;j++)
            dp[i][j]=min(dp[p1-1][j-1],dp[p2-1][j]+1);
        dp[i][0]=dp[p2-1][0]+1;
    }
    for(i=0;i<=p;i++)
        if(dp[n][i]<=q)
          return 1;
    return 0;
}
int main()
{
    //freopen("data.in","r",stdin);
    ios_base::sync_with_stdio(false);
    cin>>n>>p>>q;
    for(i=1;i<=n;i++)
        cin>>v[i];
    sort(v+1,v+n+1);
    if(p+q>=n)
    {
        cout<<"1";
        return 0;
    }
    val=(1<<29)-1;
    for(int p=28;p>=0;p--)
        if(check(val-(1<<p)))
           val-=(1<<p);
    cout<<val;
    return 0;
}

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 760 KB Output is correct
2 Correct 2 ms 760 KB Output is correct
3 Correct 2 ms 760 KB Output is correct
4 Correct 2 ms 760 KB Output is correct
5 Correct 2 ms 760 KB Output is correct
6 Correct 2 ms 760 KB Output is correct
7 Correct 2 ms 876 KB Output is correct
8 Correct 2 ms 916 KB Output is correct
9 Correct 2 ms 964 KB Output is correct
10 Correct 2 ms 964 KB Output is correct
11 Correct 3 ms 964 KB Output is correct
12 Correct 3 ms 964 KB Output is correct
13 Correct 2 ms 964 KB Output is correct
14 Correct 2 ms 968 KB Output is correct
15 Correct 2 ms 968 KB Output is correct

Subtask #2
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 8516 KB Output is correct
2 Correct 2 ms 8516 KB Output is correct
3 Correct 2 ms 8516 KB Output is correct
4 Correct 2 ms 8516 KB Output is correct
5 Correct 2 ms 8516 KB Output is correct
6 Correct 3 ms 8516 KB Output is correct
7 Correct 11 ms 8644 KB Output is correct
8 Correct 24 ms 9540 KB Output is correct
9 Correct 93 ms 14544 KB Output is correct
10 Correct 211 ms 16208 KB Output is correct
11 Correct 20 ms 16208 KB Output is correct
12 Correct 117 ms 16336 KB Output is correct
13 Correct 11 ms 16336 KB Output is correct
14 Correct 11 ms 16336 KB Output is correct
15 Correct 11 ms 16336 KB Output is correct