Unvarnished Report

题目描述

KEYENCE 有一种如实报告事物的文化，无论好坏。
所以我们想检查所报告的内容是否与原文完全相同。

You are given two strings $S$ and $T$, consisting of lowercase English letters.
If $S$ and $T$ are equal, print $0$; otherwise, print the position of the first character where they differ.
Here, if the $i$-th character exists in only one of $S$ and $T$, consider that the $i$-th characters are different. More precisely, if $S$ and $T$ are not equal, print the smallest integer $i$ satisfying one of the following conditions:

$1\leq i\leq |S|$, $1\leq i\leq |T|$, and $S_i\neq T_i$. |S| < i \leq |T|. |T| < i \leq |S|.

Here, $|S|$ and $|T|$ denote the lengths of $S$ and $T$, respectively, and $S_i$ and $T_i$ denote the $i$-th characters of $S$ and $T$, respectively.

输入格式

The input is given from Standard Input in the following format: $S$ $T$

输出格式

If $S$ and $T$ are equal, print $0$; otherwise, print the position of the first character where they differ.

abcde
abedc

3

abcde
abcdefg

6

keyence
keyence

0

提示

$S$ and $T$ are strings of length between $1$ and $100$, inclusive, consisting of lowercase English letters.We have $S=$ $abcde$ and $T=$ $abedc$.
$S$ and $T$ have the same first and second characters, but differ at the third character, so print $3$.
We have $S=$ $abcde$ and $T=$ $abcdefg$.
$S$ and $T$ are equal up to the fifth character, but only $T$ has a sixth character, so print $6$.
$S$ and $T$ are equal, so print $0$.

标签: AtCoder|abc374B

来源

AtCoder|abc374B