oj.uz

답안 #743419

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
743419 2023-05-17T11:31:43 Z Valters07 구경하기 (JOI13_watching) C++14
100 / 100
 491 ms 15956 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;
    int k1 = 1, k2 = 2;
    if(c0>c1)
        swap(c0,c1),
        swap(k1,k2);
    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*k1)
                it0++;
            while(pos[i]-pos[it1]+1>w*k2)
                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

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 724 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 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 2 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

# 결과 실행 시간 메모리 Grader output
1 Correct 7 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 1 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 11 ms 8404 KB Output is correct
8 Correct 63 ms 9300 KB Output is correct
9 Correct 87 ms 9316 KB Output is correct
10 Correct 49 ms 9044 KB Output is correct
11 Correct 50 ms 9044 KB Output is correct
12 Correct 491 ms 15956 KB Output is correct
13 Correct 9 ms 8404 KB Output is correct
14 Correct 11 ms 8460 KB Output is correct
15 Correct 11 ms 8404 KB Output is correct