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May 20, 2021 03:27
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original implementation
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| def duel(a, b): | |
| fa = 16807 | |
| fb = 48271 | |
| d = 0x7fffffff | |
| count1 = 0 | |
| a4 = [] | |
| b8 = [] | |
| for i in range(40000000): | |
| a = (a * fa) % d | |
| b = (b * fb) % d | |
| a16 = a & 0xffff | |
| b16 = b & 0xffff | |
| count1 += a16 == b16 | |
| if not a16 & 0b11: | |
| a4.append(a16) | |
| if not b16 & 0b111: | |
| b8.append(b16) | |
| while len(b8) < 5000000: | |
| b = (b * fb) % d | |
| b16 = b & 0xffff | |
| if not b16 & 0b111: | |
| b8.append(b16) | |
| count2 = sum(a4[i] == b8[i] for i in range(5000000)) | |
| return count1, count2 | |
| assert duel(783, 325) == (650, 336) |
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