oj.uz

Submission #1051024

# Submission time Handle Problem Language Result Execution time Memory
1051024 2024-08-09T18:31:21 Z dpsaveslives Watching (JOI13_watching) C++17
100 / 100
 577 ms 4264 KB 
#include <bits/stdc++.h>
using namespace std;

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int N,P,Q; cin >> N >> P >> Q;
    vector<int> arr(N+1);
    for(int i = 1;i<=N;++i) cin >> arr[i];
    if(P+Q >= N){
        cout << 1 << "\n";
        return 0;
    }
    sort(arr.begin(),arr.end());
    int lo = 0, hi = 1e9;
    while(lo < hi){
        int w = lo+(hi-lo)/2;
        vector<vector<int>> dp(P+1,vector<int>(Q+1,0));
        bool good = false;
        for(int i = 0;i<=P;++i){
            for(int j = 0;j<=Q;++j){
                if(i >= 1){
                    int it = upper_bound(arr.begin(),arr.end(),arr[dp[i-1][j]+1]+w-1)-arr.begin()-1;
                    dp[i][j] = max(dp[i][j],it);
                }
                if(j >= 1){
                    int it2 = upper_bound(arr.begin(),arr.end(),arr[dp[i][j-1]+1]+2*w-1)-arr.begin()-1;
                    dp[i][j] = max(dp[i][j],it2);
                }
                if(dp[i][j] >= N){
                    good = true;
                }
            }
        }
        if(good){
            hi = w;
        }
        else{
            lo = w+1;
        }
    }
    cout << lo << "\n";
    return 0;
}

Subtask #1
50.0 / 50.0

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

Subtask #2
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 428 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 62 ms 892 KB Output is correct
9 Correct 57 ms 880 KB Output is correct
10 Correct 104 ms 1208 KB Output is correct
11 Correct 174 ms 1160 KB Output is correct
12 Correct 577 ms 4264 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct