//Instead of using the classic recursive approach i.e. x*pow(x, n-1) just have (x*x), i.e., pow(x*x, n/2). //This will make the TC logarithmic instead of linear. //Just take care of the edge cases ...
//Similar to binary search in 1D array, here the search space is from (0,0) to (m-1,n-1) ...
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