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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| 319 - 308 = | 861 - 847 = | 110 - 106 = | 429 + 412 = |
| 429 - 214 = | 132 - 129 = | 304 - 292 = | 426 + 118 = |
| 314 - 174 = | 135 + 526 = | 340 + 188 = | 488 + 439 = |
| 110 + 689 = | 103 + 605 = | 903 - 122 = | 314 + 413 = |
| 412 - 282 = | 183 + 155 = | 183 - 105 = | 110 + 557 = |
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