k,r = map(int,input().split())
s = 1
t = k
while t % 10 != 0 and (t % 10)- r != 0:
s += 1
t = s * k
print(s)
//
// Created by erefa on 1/31/2023.
//
#include "bits/stdc++.h"
using namespace std;
int main()
{
int k , r , num=0 ;
bool flag= true;
cin>>k>>r;
while (flag)
{
num++;
if(num*k%10==0||num*k%10==r)
flag= false;
}
cout<<num;
return 0;
}734A - Anton and Danik | 1300B - Assigning to Classes |
1647A - Madoka and Math Dad | 710A - King Moves |
1131A - Sea Battle | 118A - String Task |
236A - Boy or Girl | 271A - Beautiful Year |
520B - Two Buttons | 231A - Team |
479C - Exams | 1030A - In Search of an Easy Problem |
158A - Next Round | 71A - Way Too Long Words |
160A - Twins | 1A - Theatre Square |
1614B - Divan and a New Project | 791A - Bear and Big Brother |
1452A - Robot Program | 344A - Magnets |
96A - Football | 702B - Powers of Two |
1036A - Function Height | 443A - Anton and Letters |
1478B - Nezzar and Lucky Number | 228A - Is your horseshoe on the other hoof |
122A - Lucky Division | 1611C - Polycarp Recovers the Permutation |
432A - Choosing Teams | 758A - Holiday Of Equality |