摘要：
You are given a list of preferences for n friends, where n is always even. For each person i, preferences[i] contains a list of friends sorted in the 阅读全文
posted @ 2020-09-16 10:27
Schwifty
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摘要：
Given a rows x cols matrix mat, where mat[i][j] is either 0 or 1, return the number of special positions in mat. A position (i,j) is called special if 阅读全文
posted @ 2020-09-16 08:37
Schwifty
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