class Solution {
public String solution(String my_string, int n) {
StringBuilder sb = new StringBuilder();
char[] charArr = my_string.toCharArray();
for (int i = 0; i < charArr.length; i ++) {
for(int j = 0; j < n; j ++) {
sb.append(charArr[i]);
}
}
return sb.toString();
}
}
Java
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