백준 5949 Adding Commas (USACO December 2010 Bronze 3번)
문제 링크: https://www.acmicpc.net/problem/5949 5949번: Adding Commas Bessie is working with large numbers N (1 s; int sz = s.size(); if(sz > 9) { s.insert(1, ","); s.insert(5, ","); s.insert(9, ","); } else if(sz > 6) { s.insert(sz - 6, ","); s.insert(sz - 2, ","); } else if(sz > 3) { s.insert(sz - 3, ","); } cout Colored by Color Scripter