leetcode 2028. 找出缺失的观测数据（java）

简单中等构造题 写了差不多 小问题 修修改改就ok

java: 

class Solution {
    public int[] missingRolls(int[] rolls, int mean, int n) {
        int rsum = 0;
        int m = rolls.length;
        for(int i = 0; i < m; i++){
            rsum += rolls[i];
        }
        int miss = mean * (m + n);
        for(int roll : rolls){
            miss -= roll;
        }
        if(miss < n || miss > 6 * n){
            return new int[0];
        }
        int p = miss / n;
        int q = miss % n;
        int[] missing = new int[n];
        for(int i = 0; i < n; i++){
            missing[i] = p + (i < q ? 1 : 0);
        }
        return missing;
    }
}