제출 #1319901

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1319901		aaaaaaaa	구경하기 (JOI13_watching)	C++20	0 / 100	1095 ms	332 KiB

watching

#include <bits/stdc++.h>
using namespace std;
#define int long long
const int mxN = 105;
const int inf = 2e18 + 4;
int a[mxN], dp[mxN][100004], n, s, b, cur;
int f(int i, int s){
    if(s < 0) return inf;
    if(i == n) return 0;
    //if(dp[i][s] != -1) return dp[i][s];
    int ans = inf;
    for(int j = i + 1; j <= n; ++j){
        ans = min(ans, f(j, s - 1));
        if((a[j] - a[i] + 1) > cur) break;
    }
    for(int j = i + 1; j <= n; ++j){
        ans = min(ans, f(j, s) + 1);
        if((a[j] - a[i] + 1) > 2 * cur) break;
    }
    return ans;
}
signed main(){
    ios::sync_with_stdio(0);
    cin.tie(nullptr); cout.tie(nullptr);
    cin >> n >> s >> b;
    for(int i = 0; i < n; ++i){
        cin >> a[i];
    }
    a[n] = inf;
    sort(a, a + n);
    int st = 0, en = 1e9 + 7, ans = 0;
    while(st <= en){
        int mid = st + (en - st) / 2;
        cur = mid;
        if(f(0, s) <= b){
            ans = mid;
            en = mid - 1;
        }else{
            st = mid + 1;
        }
    }
    cout << ans << "\n";
    return 0;
}

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