oj.uz

답안 #909651

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
909651 2024-01-17T10:13:12 Z schzeey 구경하기 (JOI13_watching) C++14
50 / 100
 623 ms 30356 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
int n, a, b;
vector <int> arr;
bool check(int ans){
    vector<vector<int>> dp(n+1, vector<int>(a+1, 0));
    arr[0] = ans*-1;
    for (int i = 1; i <= n; ++i){
        //int pa = i, pb = i;
        //do pa--; while(pa != 0 && arr[i]-arr[pa] < ans);
        //do pb--; while(pb != 0 && arr[i]-arr[pb] < 2*ans);
        int pa = 0, pb = 0;
        while (pa+1 < i && arr[i]-arr[pa+1] >= ans) pa++;
        while (pb+1 < i && arr[i]-arr[pb+1] >= 2*ans) pb++;
        for (int j = 0; j < a+1; ++j){
            if (i == 0) dp[i][j] = dp[pb][j]+1;
            else dp[i][j] = min(dp[pb][j]+1, dp[pa][j-1]);
        }
    }
    return *min_element(dp[n].begin(), dp[n].end()) <= b;
}

int32_t main(){
    cin >> n >> a >> b;
    arr.resize(n+1);
    for (int i = 1; i <= n; ++i) cin >> arr[i];
    if (a+b >= n) return cout<<1, 0;
    sort(arr.begin(), arr.end());
    //for (auto e: arr) cout << e << " ";
    int lf = 0, ri = 1e9+128;
    while (lf <= ri){
        int mid = (lf+ri)/2;
        //cout << mid << " ";
        if (check(mid)) ri = mid-1;
        else lf = mid+1;
    }
    cout << lf;
}

Subtask #1
50.0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 504 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 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 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct

Subtask #2
0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 26 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 2 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 64 ms 604 KB Output is correct
8 Correct 100 ms 2488 KB Output is correct
9 Correct 283 ms 12432 KB Output is correct
10 Correct 623 ms 30356 KB Output is correct
11 Incorrect 125 ms 1916 KB Output isn't correct
12 Halted 0 ms 0 KB -