結果
問題 | No.1501 酔歩 |
ユーザー | kimiyuki |
提出日時 | 2021-05-07 22:24:26 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 679 ms / 2,000 ms |
コード長 | 1,080 bytes |
コンパイル時間 | 958 ms |
コンパイル使用メモリ | 87,032 KB |
実行使用メモリ | 119,324 KB |
最終ジャッジ日時 | 2023-10-13 13:39:32 |
合計ジャッジ時間 | 25,714 ms |
ジャッジサーバーID (参考情報) |
judge12 / judge15 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 208 ms
90,228 KB |
testcase_01 | AC | 217 ms
90,152 KB |
testcase_02 | AC | 213 ms
90,244 KB |
testcase_03 | AC | 210 ms
90,008 KB |
testcase_04 | AC | 212 ms
90,152 KB |
testcase_05 | AC | 543 ms
109,880 KB |
testcase_06 | AC | 449 ms
105,852 KB |
testcase_07 | AC | 497 ms
109,844 KB |
testcase_08 | AC | 319 ms
96,316 KB |
testcase_09 | AC | 472 ms
107,328 KB |
testcase_10 | AC | 346 ms
98,524 KB |
testcase_11 | AC | 453 ms
105,672 KB |
testcase_12 | AC | 389 ms
102,160 KB |
testcase_13 | AC | 203 ms
89,960 KB |
testcase_14 | AC | 201 ms
90,040 KB |
testcase_15 | AC | 200 ms
89,932 KB |
testcase_16 | AC | 198 ms
89,972 KB |
testcase_17 | AC | 200 ms
90,088 KB |
testcase_18 | AC | 199 ms
90,036 KB |
testcase_19 | AC | 199 ms
90,148 KB |
testcase_20 | AC | 199 ms
90,272 KB |
testcase_21 | AC | 200 ms
89,936 KB |
testcase_22 | AC | 565 ms
118,840 KB |
testcase_23 | AC | 569 ms
118,208 KB |
testcase_24 | AC | 567 ms
118,692 KB |
testcase_25 | AC | 553 ms
118,428 KB |
testcase_26 | AC | 546 ms
118,380 KB |
testcase_27 | AC | 562 ms
118,392 KB |
testcase_28 | AC | 571 ms
118,700 KB |
testcase_29 | AC | 545 ms
118,220 KB |
testcase_30 | AC | 588 ms
118,164 KB |
testcase_31 | AC | 549 ms
118,312 KB |
testcase_32 | AC | 555 ms
118,344 KB |
testcase_33 | AC | 570 ms
118,548 KB |
testcase_34 | AC | 574 ms
119,276 KB |
testcase_35 | AC | 582 ms
119,080 KB |
testcase_36 | AC | 588 ms
118,264 KB |
testcase_37 | AC | 547 ms
118,792 KB |
testcase_38 | AC | 557 ms
118,504 KB |
testcase_39 | AC | 679 ms
118,352 KB |
testcase_40 | AC | 567 ms
119,256 KB |
testcase_41 | AC | 572 ms
118,048 KB |
testcase_42 | AC | 491 ms
118,532 KB |
testcase_43 | AC | 225 ms
90,156 KB |
testcase_44 | AC | 222 ms
90,264 KB |
testcase_45 | AC | 497 ms
118,400 KB |
testcase_46 | AC | 490 ms
118,212 KB |
testcase_47 | AC | 463 ms
117,624 KB |
testcase_48 | AC | 493 ms
119,324 KB |
testcase_49 | AC | 511 ms
119,212 KB |
testcase_50 | AC | 487 ms
118,944 KB |
testcase_51 | AC | 492 ms
119,088 KB |
testcase_52 | AC | 489 ms
118,908 KB |
testcase_53 | AC | 197 ms
90,136 KB |
testcase_54 | AC | 198 ms
90,132 KB |
testcase_55 | AC | 199 ms
90,216 KB |
ソースコード
#!/usr/bin/env python3 import fractions from typing import * def solve(n: int, k: int, x: List[int]) -> str: if k == n: return 1 a = [None] * (n - 1) b = [None] * (n - 1) a[0] = 0 b[0] = 0 for i in range(1, n - 1): left = fractions.Fraction(x[i - 1], x[i - 1] + x[i + 1]) right = fractions.Fraction(x[i + 1], x[i - 1] + x[i + 1]) a[i] = right / (1 - a[i - 1] * left) b[i] = b[i - 1] * left / (1 - a[i - 1] * left) c = 1 for i in reversed(range(k - 1, n - 1)): c = a[i] * c + b[i] return c # generated by oj-template v4.7.2 (https://github.com/online-judge-tools/template-generator) def main(): import sys tokens = iter(sys.stdin.read().split()) N = int(next(tokens)) K = int(next(tokens)) A = [None for _ in range(N)] for i in range(N): A[i] = int(next(tokens)) assert next(tokens, None) is None a = solve(N, K, A) if a == 0: print(0) elif a == 1: print('1/1') else: print(a) if __name__ == '__main__': main()