Distinguish leading, middle, and trailing zeros in otherwise similar records.

Read the entire record before entering it and never infer a missing zero from the surrounding pattern.

练习输入: leading zero, middle zero, trailing zero

目标: 99.00% 准确率.

Zero Placement Guided Entry: 01 10 101 110 1001 1010 1050 1500 5001 5010 5100

Zero Placement Accuracy Review: 02 20 202 220 2002 2020 2050 2500 6003 6030 6300 70007