public class No_83{
	public static void main(String[] args){
		java.util.Scanner sc = new java.util.Scanner(System.in);
		int match = sc.nextInt();
		StringBuilder sb = new StringBuilder("");
		
		for(int i = 0;i < match/2;i++){
			sb.append('1');
		}
		
		if(match%2 != 0){
			sb.setCharAt(sb.length()-1,'7');
		}
		
		System.out.println(sb);
		
	}
}