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n = len(A)

curr_sum = A[0]
Max_sum = curr_sum

for i in range(1,len(A)):
    if A[i]<A[i-1]:
        curr_sum +=A[i]
    

    else:
        curr_sum = A[i]
    
    Max_sum = max(Max_sum,curr_sum)

return Max_sum