heestory

https://leetcode.com/problems/set-matrix-zeroes/ Given amxnmatrix, if an element is 0, set its entire row and column to 0. Do itin-place. Example 1 Input: [ [1,1,1], [1,0,1], [1,1,1] ] Output: [ [1,0,1], [0,0,0], [1,0,1] ] Example 2 Input: [ [0,1,2,0], [3,4,5,2], [1,3,1,5] ] Output: [ [0,0,0,0], [0,4,5,0], [0,3,1,0] ] Follow up A straight forward solution using O(mn) space is probably a bad idea..

traning center [Genomic Range Query] A DNA sequence can be represented as a string consisting of the letters A, C, G and T, which correspond to the types of successive nucleotides in the sequence. Each nucleotide has an impact factor, which is an integer. Nucleotides of types A, C, G and Thave impact factors of 1, 2, 3 and 4, respectively. You are going to answer several queries of the form: Wha..

codility / traning center [MaxCounters] You are given N counters, initially set to 0, and you have two possible operations on them:increase(X) − counter X is increased by 1,max counter − all counters are set to the maximum value of any counter.A non-empty zero-indexed array A of M integers is given. This array represents consecutive operations:if A[K] = X, such that 1 ≤ X ≤ N, then operation K i..

codility / traning center [MinAvgTwoSlice] A non-empty zero-indexed array A consisting of N integers is given. A pair of integers (P, Q), such that 0 ≤ P < Q < N, is called a slice of array A (notice that the slice contains at least two elements). The average of a slice (P, Q) is the sum of A[P] + A[P + 1] + ... + A[Q] divided by the length of the slice. To be precise, the average equals (A[P] +..