1805. 字符串中不同整数的数目

1805. 字符串中不同整数的数目

class Solution {
    public int numDifferentIntegers(String word) {
        char[] chars = word.toCharArray();
        int n = chars.length;
        Set<String> set = new HashSet<>();
        for (int i = 0; i < n; i++) {
            int temp = 0;
            boolean flag = false;
            boolean zero = true;
            StringBuilder stringBuilder = new StringBuilder();
            while (i < n && chars[i] >= '0' && chars[i] <= '9') {
                flag = true;
                if (zero && chars[i] == '0') {
                    i++;
                    continue;
                }
                zero = false;
                stringBuilder.append(chars[i]);
                i++;
            }
            if (flag) {
                set.add(stringBuilder.length() == 0 ? "0" : stringBuilder.toString());
            }
        }
        return set.size();
    }
}