9164: ABC282 —— C - String Delimiter
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Description
You are given a string $S$ of length $N$ consisting of lowercase English letters, `,`, and `"`. It is guaranteed that $S$ contains an even number of `"`.
Let $2K$ be the number of `"` in $S$. For each $i=1,2,\ldots,K$, the characters from the $(2i-1)$-th `"` through the $(2i)$-th `"` are said to be enclosed.
Your task is to replace each `,` in $S$ that is not an enclosed character with `.` and print the resulting string.
Let $2K$ be the number of `"` in $S$. For each $i=1,2,\ldots,K$, the characters from the $(2i-1)$-th `"` through the $(2i)$-th `"` are said to be enclosed.
Your task is to replace each `,` in $S$ that is not an enclosed character with `.` and print the resulting string.
Input
The input is given from Standard Input in the following format:
```
$N$
$S$
```
```
$N$
$S$
```
Output
Print the answer.
Constraints
- $N$ is an integer between $1$ and $2\times 10^5$, inclusive.
- $S$ is a string of length $N$ consisting of lowercase English letters, `,`, and `"`.
- $S$ contains an even number of `"`.
- $S$ is a string of length $N$ consisting of lowercase English letters, `,`, and `"`.
- $S$ contains an even number of `"`.
Sample 1 Input
8
"a,b"c,d
Sample 1 Output
"a,b"c.d
In S, "a,b" are enclosed characters, and c,d are not.
The , in S that is not an enclosed character is the seventh character from the left in S, so replace that character with . to get the answer.
The , in S that is not an enclosed character is the seventh character from the left in S, so replace that character with . to get the answer.
Sample 2 Input
5
,,,,,
Sample 2 Output
.....
Sample 3 Input
20
a,"t,"c,"o,"d,"e,"r,
Sample 3 Output
a."t,"c."o,"d."e,"r.
HINT
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