77_Floor_in_a_Sorted_Array

import bisect
class Solution:
    #User function Template for python3
    
    #Complete this function
    def findFloor(self,A,N,X):
        #Your code here
        if X<A[0]:
            return -1
        if X>A[-1]:
            return N-1
        t=bisect.bisect_left(A,X)
        if A[t]==X:
            return t
        return t-1