跟着消防员爸爸学习C++编程与算法(请备注算法学习)
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| 50 - 46 = | 93 - 57 = | 59 + 29 = | 48 + 46 = |
| 47 + 43 = | 52 + 48 = | 60 - 58 = | 80 - 67 = |
| 19 + 15 = | 66 + 16 = | 81 - 48 = | 29 + 24 = |
| 94 - 29 = | 80 - 27 = | 57 + 39 = | 52 - 43 = |
| 84 - 25 = | 39 + 23 = | 43 - 36 = | 34 + 27 = |