LeetCode
Experience
#3212 Count Submatrices With Equal Frequency of X and Y
Interview Experience
LeetCode #3212: Count Submatrices With Equal Frequency of X and Y. Difficulty: Medium. Topics: Array, Matrix, Prefix Sum. Asked at Amazon in the last 6 months.
Original Source
This is a frequency-tagged signal. The full problem statement lives on the original source.
View original →Topics
Prefix Sum
Arrays
Matrix
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