oj.uz

Submission #743414

# Submission time Handle Problem Language Result Execution time Memory
743414 2023-05-17T11:29:47 Z Valters07 Watching (JOI13_watching) C++14
100 / 100
 952 ms 16020 KB 
#include <bits/stdc++.h>
#define fio ios_base::sync_with_stdio(0);cin.tie(0);
#define en cin.close();return 0;
#define ll long long
#define pb push_back
#define fi first
#define se second
using namespace std;
const int N = 2e3+5;
int dp[N][N];// pos, c0 taken = min c1 taken
bool check(vector<int> &pos, int c0, int c1, int w)
{
    int n = pos.size()-1;
    for(int j = 0;j<=c0;j++)
    {
        int it0 = 1, it1 = 1;
        for(int i = 1;i<=n;i++)
        {
            while(pos[i]-pos[it0]+1>w)
                it0++;
            while(pos[i]-pos[it1]+1>w*2)
                it1++;
            dp[i][j]=dp[it1-1][j]+1;
            if(j>0)
                dp[i][j]=min(dp[i][j],dp[it0-1][j-1]);
        }
    }
    int minc1 = 1e9;
    for(int i = 0;i<=c0;i++)
        minc1=min(minc1,dp[n][i]);
    return (minc1<=c1);
}
int main()
{
    fio
//    ifstream cin("in.in");
    int n, c0, c1;
    cin >> n >> c0 >> c1;
    if(n<=c0+c1)
        return cout << 1, 0;
    vector<int> pos(n+1);
    for(int i = 1;i<=n;i++)
        cin >> pos[i];
    sort(pos.begin()+1,pos.end());
    for(int i = 1;i<=n;i++)
        dp[0][i]=n;
    int l = 1, r = 1e9;
    while(l<r)
    {
        int mid = (l+r)/2;
        if(check(pos,c0,c1,mid))
            r=mid;
        else
            l=mid+1;
    }
    cout << l;
    return 0;
}

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 724 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 1 ms 724 KB Output is correct
10 Correct 1 ms 724 KB Output is correct
11 Correct 1 ms 724 KB Output is correct
12 Correct 1 ms 724 KB Output is correct
13 Correct 1 ms 724 KB Output is correct
14 Correct 1 ms 724 KB Output is correct
15 Correct 1 ms 724 KB Output is correct

Subtask #2
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 8276 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 12 ms 8472 KB Output is correct
8 Correct 63 ms 9328 KB Output is correct
9 Correct 398 ms 14224 KB Output is correct
10 Correct 952 ms 16020 KB Output is correct
11 Correct 45 ms 9044 KB Output is correct
12 Correct 472 ms 16020 KB Output is correct
13 Correct 10 ms 8404 KB Output is correct
14 Correct 12 ms 8416 KB Output is correct
15 Correct 12 ms 8428 KB Output is correct