870.Advantage Shuffle

Description

Given two arrays A and B of equal size, the advantage of A with respect to B is the number of indices i for which A[i] > B[i].

Return any permutation of A that maximizes its advantage with respect to B.

题目链接:https://leetcode.com/problems/advantage-shuffle/

Difficulty: medium

Example 1:

Input: A = [2,7,11,15], B = [1,10,4,11]
Output: [2,11,7,15]

Example 2:

Input: A = [12,24,8,32], B = [13,25,32,11]
Output: [24,32,8,12]

Note:

  • 1 <= A.length = B.length <= 10000
  • 0 <= A[i] <= 10^9
  • 0 <= B[i] <= 10^9

分析

  1. updating

参考代码

class Solution:
def advantageCount(self, A, B):
    s_a=sorted(A)
    s_b=sorted(B)
    assigned={b:[] for b in B}
    li=[]
    j=0
    for a in s_a:
        if(a > s_b[j]):
            assigned[s_b[j]].append(a)
            j += 1
        else:
            li.append(a)

    return [assigned[b].pop() if assigned[b] else li.pop() for b in B]
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