每日三题-跳跃游戏、根据身高重建队列、任务调度器

class Solution {
    public boolean canJump(int[] nums) {
        int maxPosition = 0;
        for(int i = 0;i < nums.length;i++){
            // maxPosition 为到目前为止能够到最右边的距离
            if(i > maxPosition) return false;
            maxPosition = Math.max(maxPosition,i + nums[i]);            
            if(maxPosition >= nums.length-1) return true;
        }
        return false;
    }
}

class Solution {
    public int[][] reconstructQueue(int[][] people) {
        Arrays.sort(people,(int[] p1,int p2[])->{
            if(p1[0] != p2[0]) return p2[0] - p1[0];
            return p1[1] - p2[1];
        });
        
        List<int []> res = new ArrayList<int[]>();
        for(int[] p : people){
            res.add(p[1],p);
        }
        return res.toArray(new int[people.length][2]);
    }
}

class Solution {
    public int leastInterval(char[] tasks, int n) {
        int [] task = new int[26];
        for(int i = 0;i < tasks.length;i++){
            task[tasks[i]-'A']++;
        }
        int max = 0;
        int maxCount = 0;
        for(int i = 0;i < 26;i++){
            if(task[i] > max){
                max = task[i];
                maxCount = 1;
            }else if(task[i] == max){
                maxCount++;
            }
        }
        return Math.max(tasks.length,(max-1)*(n+1)+maxCount);
    }
}