Question: 
Write a function to find the closest smaller number than n.


Model's Code:
def closest_num(n):
    return n - 1



Sample Correct Code:
def closest_num(N):
  return (N - 1)


Asserts:
assert closest_num(11) == 10
assert closest_num(7) == 6
assert closest_num(12) == 11


Tests:
Test 1 of 3: PASS
Test 2 of 3: PASS
Test 3 of 3: PASS

Test 89 of 974: 67/89 (75.28089887640449%): success