#include<stdio.h>
int main(void){
	int n,a,b;
	scanf("%d",&n);
	
	a = n/2;
	if(n%2 == 1){
		printf("7");
		a--;
	}
	for(b=0;b<a;b++){
		printf("1");
	}
	printf("\n");
	return 0;
}