No.481 1 to 10
レベル :
/ AI推定難易度 : 75
/ 実行時間制限 : 1ケース 2.000秒 / メモリ制限
: 512 MB / 標準ジャッジ問題
タグ : / 解いたユーザー数 1216
作問者 :
nmnmnmnmnmnmnm
/ テスター :
tatuyan_edson
タグ : / 解いたユーザー数 1216
作問者 :
nmnmnmnmnmnmnm
/ テスター :
tatuyan_edson
問題文最終更新日: 2026-06-27 16:17:26
English (AI translation)
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yukicoder contest 156
(順位表)
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Problem Statement
A-kun tried to write the numbers from 1 to 10 from left to right.
However, A-kun noticed that he had written only 9 numbers.
It seems that he failed to write one of the numbers he should have written.
What is the number that A-kun did not write?
Input
$B_1$ $B_2$ $\dots$ $B_9$
Exactly 9 numbers are given as input.
$B_i$ is the $i$-th integer from the left. $1 \le B_i \le 10$.
All values of $B_i$ are distinct and are in ascending order from left to right.
Output
Output the answer on one line, followed by a newline at the end.
Sample
Sample 1
Input
1 2 4 5 6 7 8 9 10
Output
3
A-kun did not write 3.
Sample 2
Input
1 2 3 4 5 6 7 9 10
Output
8
A-kun did not write 8.
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