Yzk has an array a a consisting of n n integers a_1, a_2, a_3dots a_n a 1 ,a 2 ,a 3 …a n . In one operation, he can select a continuous sub-array of exactly length k k, then change all elements in the sub-array to the minimum element in this sub-array. Please help him found the minimum number of operations to make all elements in the array a a equal.
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