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  1. Diagonal Difference
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Diagonal Difference

  • angryfrip
     + 0 comments

    GO

    coz this is a square matrix, we can calculate the first and second sums at the same time.

    func diagonalDifference(arr [][]int32) int32 {
    // Write your code here
    size := len(arr[0])-1
    
    sum1, sum2 := int32(0), int32(0)
    
    for i,j :=0, size; i<=size; i,j = i+1, j-1{
        sum1 += arr[i][i]
        sum2 += arr[i][j]
    }
    
    res := sum1 - sum2
    if res > 0{
        return res
    }
    return -res
}