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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| 89 - 37 = | 83 - 64 = | 64 + 26 = | 90 - 68 = |
| 30 - 21 = | 28 - 12 = | 68 - 59 = | 37 - 34 = |
| 48 + 24 = | 86 - 31 = | 77 + 23 = | 100 - 31 = |
| 41 + 58 = | 100 - 41 = | 49 - 46 = | 80 - 51 = |
| 40 + 38 = | 47 + 13 = | 92 - 54 = | 97 - 66 = |
| 21 + 47 = | 87 - 63 = | 49 + 39 = | 52 + 25 = |
| 39 + 12 = | 62 + 18 = | 29 + 21 = | 94 - 87 = |
| 20 + 74 = | 12 + 14 = | 56 - 51 = | 58 + 33 = |
| 32 + 11 = | 14 + 63 = | 48 + 45 = | 39 + 15 = |
| 80 - 13 = | 85 - 50 = | 63 - 62 = | 22 + 26 = |
| 48 + 38 = | 39 + 37 = | 97 - 96 = | 49 + 42 = |
| 65 - 54 = | 48 + 32 = | 57 - 42 = | 99 - 98 = |
| 29 + 16 = | 48 + 43 = | 33 - 29 = | 15 + 60 = |
| 39 + 35 = | 37 + 32 = | 100 - 61 = | 72 - 15 = |
| 60 - 56 = | 48 + 47 = | 52 - 33 = | 56 - 38 = |
| 49 + 46 = | 87 - 70 = | 17 + 81 = | 87 - 45 = |
| 16 + 22 = | 98 - 97 = | 64 - 27 = | 68 + 27 = |
| 61 - 25 = | 98 - 72 = | 14 + 65 = | 97 - 28 = |
| 25 + 31 = | 26 + 14 = | 40 - 32 = | 31 + 35 = |
| 49 + 31 = | 22 + 77 = | 49 + 44 = | 31 + 57 = |
| 92 - 23 = | 93 - 76 = | 53 + 46 = | 42 + 51 = |
| 71 - 19 = | 94 - 69 = | 37 + 36 = | 98 - 67 = |
| 100 - 82 = | 28 - 16 = | 15 + 33 = | 57 - 56 = |
| 57 - 24 = | 68 - 35 = | 39 + 22 = | 74 - 35 = |
| 69 - 32 = | 31 + 27 = | 40 + 40 = | 31 + 18 = |
消防员爸爸