algorithm/src/main/java/com/dota/Solution.java

package com.dota;

public class Solution {
    // 1423. 可获得的最大点数
    public int maxScore(int[] cardPoints, int k) {
        int max;
        int n = cardPoints.length;
        int len = n - k;
        int sum = 0;
        for (int cardPoint : cardPoints) {
            sum += cardPoint;
        }


        int temp = 0;
        for (int i = 0; i < len; i++) {
            temp += cardPoints[i];
        }

        max = temp;
        for (int i = len; i < n; i++) {
            temp -= cardPoints[i - len];
            temp += cardPoints[i];
            if (temp < max) {
                max = temp;
            }
        }

        return sum - max;
    }

    // 2048. 下一个更大的数值平衡数
    public int nextBeautifulNumber(int n) {
        while(!ok(++n)) {
        }
        return n;
    }
    private boolean ok(int n){
        if (n==0) {
            return false;
        }

        int[] dp = new int[10];
        while (n!=0) {
            int t = n%10;
            dp[t]++;
            if (dp[t] > t) {
                return false;
            }

            n/=10;
        }

        for (int i = 1; i < dp.length; i++) {
            if (dp[i]!=0 && dp[i]!=i) {
                return false;
            }
        }

        return true;
    }
}