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# 1115. Print FooBar Alternately

<https://leetcode.com/problems/print-foobar-alternately>

## Description

Suppose you are given the following code:

```
class FooBar {
  public void foo() {
    for (int i = 0; i < n; i++) {
      print("foo");
    }
  }
  public void bar() {
    for (int i = 0; i < n; i++) {
      print("bar");
    }
  }
}
```

The same instance of `FooBar` will be passed to two different threads:

* thread `A` will call `foo()`, while
* thread `B` will call `bar()`.

Modify the given program to output `"foobar"` `n` times.

**Example 1:**

```
**Input:** n = 1
**Output:** "foobar"
**Explanation:** There are two threads being fired asynchronously. One of them calls foo(), while the other calls bar().
"foobar" is being output 1 time.
```

**Example 2:**

```
**Input:** n = 2
**Output:** "foobarfoobar"
**Explanation:** "foobar" is being output 2 times.
```

**Constraints:**

* `1 <= n <= 1000`

## ac

```java
```