#include <stdio.h>

int main(int argc, char *argv[])
{
	unsigned int N_match_num = 3;
	unsigned int i;
//	scanf("%d", &N_match_num);

	for (i = 0; N_match_num != 0; i++)
	{
		if ( ( i == 0 ) && ( N_match_num % 2 != 0 ) )
		{
			printf("7");
		}
		if ( N_match_num == 3 )
		{
			break;
		}
		if (N_match_num == 1)
		{
			break;
		}
		N_match_num -= 2;
		printf("1");
	}



	return 0;
}