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AMC (AIMO validation set) / How many 4×4 arrays whose entries are 0s and 1s are there such that the row sums (the sum of the entries in each row) are 1,2,3, and 4, in some order, and the column sums (the sum … · Discussion
Discussing How many 4×4 arrays whose entries are 0s and 1s are there such that the row sums (the sum of the entries in each row) are 1,2,3, and 4, in some order, and the column sums (the sum … · AMC (AIMO validation set)
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