leet-code/src/main/java/leetcode/editor/cn/RansomNote.java
huangge1199@hotmail.com b92462a244 383:赎金信
2021-07-11 23:31:13 +08:00

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Java
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//给定一个赎金信 (ransom) 字符串和一个杂志(magazine)字符串,判断第一个字符串 ransom 能不能由第二个字符串 magazines 里面
//的字符构成。如果可以构成,返回 true ;否则返回 false。
//
// (题目说明:为了不暴露赎金信字迹,要从杂志上搜索各个需要的字母,组成单词来表达意思。杂志字符串中的每个字符只能在赎金信字符串中使用一次。)
//
//
//
// 示例 1
//
//
//输入ransomNote = "a", magazine = "b"
//输出false
//
//
// 示例 2
//
//
//输入ransomNote = "aa", magazine = "ab"
//输出false
//
//
// 示例 3
//
//
//输入ransomNote = "aa", magazine = "aab"
//输出true
//
//
//
//
// 提示:
//
//
// 你可以假设两个字符串均只含有小写字母。
//
// Related Topics 哈希表 字符串 计数
// 👍 160 👎 0
package leetcode.editor.cn;
//383:赎金信
class RansomNote {
public static void main(String[] args) {
//测试代码
Solution solution = new RansomNote().new Solution();
}
//力扣代码
//leetcode submit region begin(Prohibit modification and deletion)
class Solution {
public boolean canConstruct(String ransomNote, String magazine) {
if (ransomNote.length() > magazine.length()) {
return false;
}
int[] arr = new int[26];
for (char ch : magazine.toCharArray()) {
arr[ch - 'a']++;
}
for (char ch : ransomNote.toCharArray()) {
if (arr[ch - 'a'] < 1) {
return false;
}
arr[ch - 'a']--;
}
return true;
}
}
//leetcode submit region end(Prohibit modification and deletion)
}