#include <stdio.h>
#include<stdlib.h>
int main() {
    int s;
    int shang, yu, len, *result;
    scanf("%d",&s);
    shang = s/3;
    yu=s%3;
    switch(yu){
        case 0:
            len = 2 * shang;
            result=(int *)malloc(sizeof(int)*len);
            for(int i=0;i<len;i++){
                result[i]=(i%2==0)?2:1;
            }
            break;
        case 1:
            len = 2 * shang + 1;
            result = (int *)malloc(sizeof(int) * len);
            for(int i=0;i<len;i++){
                result[i]=(i%2==0)?1:2;
            }
            break;
        case 2:
            len = 2 * shang + 1;
            result = (int *)malloc(sizeof(int) * len);
            for (int i = 0; i < len; i++)
            {
                result[i] = (i % 2 == 0) ? 2 : 1;
            }
            break;
    }
    for(int i=0;i<len;i++){
        printf("%d",result[i]);
    }
    printf("\n");
    return 0;
}