License Key Formatting 2021-10-04 12:13
public String licenseKeyFormatting(String s, int k) {
s = s.replaceAll("-", "");
int first = s.length() % k;
int group = s.length() / k;
StringBuilder sb = new StringBuilder(s.toUpperCase());
int addIndex=0;
for (int i = 0; i < group; i++) {
int offset = first + k * i+addIndex;
if (offset > 0) {
sb.insert(offset, '-');
addIndex++;
}
}
return sb.toString();
}
| Runtime | Memory |
|---|---|
| 29 ms | 39.2 MB |
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