103511: [Atcoder]ABC351 B - Spot the Difference

Memory Limit:256 MB Time Limit:2 S
Judge Style:Text Compare Creator:
Submit:4 Solved:0

Description

Score: $150$ points

Problem Statement

You are given two grids, each with $N$ rows and $N$ columns, referred to as grid $A$ and grid $B$.
Each cell in the grids contains a lowercase English letter.
The character at the $i$-th row and $j$-th column of grid $A$ is $A_{i, j}$.
The character at the $i$-th row and $j$-th column of grid $B$ is $B_{i, j}$.

The two grids differ in exactly one cell. That is, there exists exactly one pair $(i, j)$ of positive integers not greater than $N$ such that $A_{i, j} \neq B_{i, j}$. Find this $(i, j)$.

Constraints

  • $1 \leq N \leq 100$
  • $A_{i, j}$ and $B_{i, j}$ are all lowercase English letters.
  • There exists exactly one pair $(i, j)$ such that $A_{i, j} \neq B_{i, j}$.

Input

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

$N$
$A_{1,1}A_{1,2}\dots A_{1,N}$
$A_{2,1}A_{2,2}\dots A_{2,N}$
$\vdots$
$A_{N,1}A_{N,2}\dots A_{N,N}$
$B_{1,1}B_{1,2}\dots B_{1,N}$
$B_{2,1}B_{2,2}\dots B_{2,N}$
$\vdots$
$B_{N,1}B_{N,2}\dots B_{N,N}$

Output

Let $(i, j)$ be the pair of positive integers not greater than $N$ such that $A_{i, j} \neq B_{i, j}$. Print $(i, j)$ in the following format:

$i$ $j$

Sample Input 1

3
abc
def
ghi
abc
bef
ghi

Sample Output 1

2 1

From $A_{2, 1} =$ d and $B_{2, 1} =$ b, we have $A_{2, 1} \neq B_{2, 1}$, so $(i, j) = (2, 1)$ satisfies the condition in the problem statement.


Sample Input 2

1
f
q

Sample Output 2

1 1

Sample Input 3

10
eixfumagit
vtophbepfe
pxbfgsqcug
ugpugtsxzq
bvfhxyehfk
uqyfwtmglr
jaitenfqiq
acwvufpfvv
jhaddglpva
aacxsyqvoj
eixfumagit
vtophbepfe
pxbfgsqcug
ugpugtsxzq
bvfhxyehok
uqyfwtmglr
jaitenfqiq
acwvufpfvv
jhaddglpva
aacxsyqvoj

Sample Output 3

5 9

Output

得分:150分

问题描述

你被给出了两个网格,每个都有 $N$ 行和 $N$ 列,分别称为网格 $A$ 和网格 $B$。
每个网格的单元格内包含一个英文字母小写字符。
网格 $A$ 的第 $i$ 行第 $j$ 列的字符是 $A_{i, j}$。
网格 $B$ 的第 $i$ 行第 $j$ 列的字符是 $B_{i, j}$。

这两个网格在恰好一个单元格上不同。也就是说,存在一个唯一的正整数对 $(i, j)$,其值不大于 $N$,满足 $A_{i, j} \neq B_{i, j}$。找到这个 $(i, j)$。

约束条件

  • $1 \leq N \leq 100$
  • $A_{i, j}$ 和 $B_{i, j}$ 都是小写英文字母。
  • 存在且仅存在一对 $(i, j)$ 使得 $A_{i, j} \neq B_{i, j}$。

输入

输入将以以下格式从标准输入给出:

$N$
$A_{1,1}A_{1,2}\dots A_{1,N}$
$A_{2,1}A_{2,2}\dots A_{2,N}$
$\vdots$
$A_{N,1}A_{N,2}\dots A_{N,N}$
$B_{1,1}B_{1,2}\dots B_{1,N}$
$B_{2,1}B_{2,2}\dots B_{2,N}$
$\vdots$
$B_{N,1}B_{N,2}\dots B_{N,N}$

输出

令 $(i, j)$ 为一对不大于 $N$ 的正整数,满足 $A_{i, j} \neq B_{i, j}$。以如下格式输出 $(i, j)$:

$i$ $j$

样例输入1

3
abc
def
ghi
abc
bef
ghi

样例输出1

2 1

从 $A_{2, 1} =$ d 和 $B_{2, 1} =$ b 可知,$A_{2, 1} \neq B_{2, 1}$,所以 $(i, j) = (2, 1)$ 满足题目描述中的条件。


样例输入2

1
f
q

样例输出2

1 1

样例输入3

10
eixfumagit
vtophbepfe
pxbfgsqcug
ugpugtsxzq
bvfhxyehfk
uqyfwtmglr
jaitenfqiq
acwvufpfvv
jhaddglpva
aacxsyqvoj
eixfumagit
vtophbepfe
pxbfgsqcug
ugpugtsxzq
bvfhxyehok
uqyfwtmglr
jaitenfqiq
acwvufpfvv
jhaddglpva
aacxsyqvoj

样例输出3

5 9

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