1768. 交替合并字符串

给你两个字符串 word1 和 word2 。请你从 word1 开始,通过交替添加字母来合并字符串。如果一个字符串比另一个字符串长,就将多出来的字母追加到合并后字符串的末尾。

返回 合并后的字符串 。

 

示例 1:

输入:word1 = "abc", word2 = "pqr"
输出:"apbqcr"
解释:字符串合并情况如下所示:
word1:  a   b   c
word2:    p   q   r
合并后:  a p b q c r

示例 2:

输入:word1 = "ab", word2 = "pqrs"
输出:"apbqrs"
解释:注意,word2 比 word1 长,"rs" 需要追加到合并后字符串的末尾。
word1:  a   b 
word2:    p   q   r   s
合并后:  a p b q   r   s

示例 3:

输入:word1 = "abcd", word2 = "pq"
输出:"apbqcd"
解释:注意,word1 比 word2 长,"cd" 需要追加到合并后字符串的末尾。
word1:  a   b   c   d
word2:    p   q 
合并后:  a p b q c   d

 

提示:

  • 1 <= word1.length, word2.length <= 100
  • word1 和 word2 由小写英文字母组成

public class Solution1768 {

	public String mergeAlternately(String word1, String word2) {
		String out = "";
		int max = word1.length() > word2.length() ? word1.length() : word2.length();
		for (int i = 0; i < max; i++) {
			if (i < word1.length()) {
				out = out + word1.substring(i, i + 1);
			}
			if (i < word2.length()) {
				out = out + word2.substring(i, i + 1);
			}

		}
		return out;

	}

	public static void main(String[] args) {

		Solution1768 sol = new Solution1768();

		String word1 = "ab", word2 = "pqrs";

		System.out.println(sol.mergeAlternately(word1, word2));
	}
}

 

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