#include <stdio.h>
#include <stdlib.h>

int main(void)
{
	int n,i,j;
	scanf("%d",&n);
	if (n%2==0) {
		printf("1");
		n-=2;
	} else {
		printf("7");
		n-=3;
	}
	j = n/2;
		
	for (i=0;i<j;i++) {
		printf("1");
	}
	printf("\n");
	
	return 0;
}