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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| 846 - 297 = | 735 + 443 = | 845 + 337 = | 211 - 210 = |
| 999 + 200 = | 349 + 572 = | 211 + 996 = | 1000 - 200 = |
| 555 - 524 = | 194 + 511 = | 849 - 117 = | 652 + 407 = |
| 777 - 736 = | 972 + 994 = | 749 + 699 = | 555 + 940 = |
| 711 - 201 = | 409 - 386 = | 972 + 859 = | 486 - 452 = |
| 702 + 253 = | 753 + 520 = | 910 + 219 = | 690 - 328 = |
| 973 - 836 = | 857 - 443 = | 652 - 288 = | 349 - 230 = |
| 440 - 374 = | 115 - 102 = | 289 + 254 = | 194 - 143 = |
| 848 + 120 = | 409 + 933 = | 703 - 202 = | 191 + 446 = |
| 973 - 967 = | 736 - 342 = | 750 - 532 = | 191 - 135 = |
| 776 + 946 = | 115 + 237 = | 857 + 508 = | 711 + 249 = |
| 440 + 827 = | 911 - 207 = | 486 + 920 = | 754 - 405 = |
| 689 + 447 = | 289 - 132 = |
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