import java.util.Scanner; public class Main { public static void main(String[] args) { //大きい数を作るには桁数を大きく //nが偶数なら1をひたすら並べる // 奇数なら1を n/2 - 1個、先頭にに7を一つ加える Scanner scanner = new Scanner(System.in); int n = scanner.nextInt(); StringBuilder sB = new StringBuilder(); if(n % 2 == 0){ int num = n / 2; for(int i=0;i