Py3 C++排序loop解Leetcode 3025 3027 Find the Number of Ways to Place People

Py3 C++排序loop解Leetcode 3025 3027 Find the Number of Ways to Place People

[Py3 code請進]

[codes on Leetcode 3025]https://leetcode.com/problems/find-the-number-of-ways-to-place-people-i/solutions/7146299/same-as-the-hard-lc-3027-beats-100/

class Solution:
    def numberOfPairs(self, P: List[List[int]]) -> int:
        P.sort(key=lambda p:(-p[0], p[1]))
        ans, n=0, len(P)
        for i in range(n-1):
            y, yi=1<<31, P[i][1]
            for j in range(i+1, n):
                yj=P[j][1]
                if y>yj>=yi:
                    ans+=1
                    y=yj
        return ans