|시간 제한||메모리 제한||제출||정답||맞은 사람||정답 비율|
|1 초||128 MB||30||21||18||78.261%|
Bessie is working with large numbers N (1 <= N <= 2,000,000,000) like 153920529 and realizes that the numbers would be a lot easier to read with commas inserted every three digits (as is normally done in the USA; some countries prefer to use periods every three digits). Thus, she would like to add commas: 153,920,529. Please write a program that does this.