#include<stdio.h>
#include<string.h>
#include<stdlib.h>
int main(void){
    int n;
scanf("%d",&n);
if(n==1){printf("1\n");}
else if(n==2){printf("2020\n");}
else if(n==3){printf("123123123\n");}
else if(n==4){printf("1234123412341234\n");}
else if(n==5){printf("1234512345123451234512345\n");}
else if(n==6){printf("123456123456123456123456123456123456\n");}
else if(n==7){printf("1234567123456712345671234567123456712345671234567\n");}
else if(n==8){printf("1234567812345678123456781234567812345678123456781234567812345678\n");}
else if(n==9){printf("123456789123456789123456789123456789123456789123456789123456789123456789123456789\n");}
else if(n==10){printf("1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890\n");}
}