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| class Solution {
public String thousandSeparator(int n) {
if (n == 0) {
return "0";
}
StringBuilder sb = new StringBuilder();
int numCount = 0;
while (n != 0) {
int x = n % 10;
n /= 10;
numCount++;
sb.append(x);
if (numCount % 3 == 0 && n != 0) {
sb.append('.');
}
}
return sb.reverse().toString();
}
}
|