oj.uz

Submission #918842

# Submission time Handle Problem Language Result Execution time Memory
918842 2024-01-30T14:08:13 Z SalihSahin Watching (JOI13_watching) C++14
100 / 100
 164 ms 8072 KB 
#include<bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define int long long
using namespace std;
 
const int mod = 1e9 + 7;
const int inf = 1e9;
const int N = 2e3 + 5;

int32_t main(){
    cin.tie(0); cout.tie(0);
    ios_base::sync_with_stdio(false);
    int n, p, q;
    cin>>n>>p>>q;

    p = min(p, n);
    q = min(q, n);
    vector<int> a(n);
    for(int i = 0; i < n; i++){
        cin>>a[i];
    }
    sort(a.begin(), a.end());

    if(p + q >= n){
        cout<<1<<endl;
        return 0;
    }

    vector<int> sm(N), bg(N);
    vector<vector<int> > dp(p+1, vector<int>(q+1, 0));

    int l = 1, r = inf + 5;
    while(l < r){
        int m = (l + r)/2;

        for(int i = 0; i <= p; i++){
            for(int j = 0; j <= q; j++){
                dp[i][j] = 0;
            }
        }

        int x = 0;
        for(int i = 0; i < n; i++){
            while(x < n && a[x] - a[i] + 1 <= m) x++;
            sm[i] = x;
        }
        sm[n] = n;
        x = 0;
        for(int i = 0; i < n; i++){
            while(x < n && a[x] - a[i] + 1 <= m * 2) x++;
            bg[i] = x;
        }
        bg[n] = n;

        for(int s = p + q - 1; s >= 0; s--){
            for(int small = p; small >= 0; small--){
                int big = s - small;
                if(big < 0 || big > q) continue;

                if(small < p) dp[small][big] = max(dp[small][big], sm[dp[small+1][big]]);
                if(big < q) dp[small][big] = max(dp[small][big], bg[dp[small][big+1]]);
            }
        }

        if(dp[0][0] == n) r = m;
        else l = m + 1;
    }

    cout<<l<<endl;
    return 0;
}

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 504 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct

Subtask #2
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 504 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 13 ms 1112 KB Output is correct
9 Correct 29 ms 1112 KB Output is correct
10 Correct 109 ms 1880 KB Output is correct
11 Correct 21 ms 1624 KB Output is correct
12 Correct 164 ms 8072 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct