#include <bits/stdc++.h>
#define pb push_back
#define int int64_t
using namespace std;

int n, k;
int dp[8][300];

signed main(){
    cin >> n >> k;
    for(int i = 0; i <= 9; i ++)
      dp[1][150+i] = 1;
    for(int c = 2; c <= k; c ++){
      for(int i = 20; i <= 270; i ++){
        for(int z = -1; z <= 1; z += 2)
          for(int j = 0; j <= 9; j ++)
            dp[c][i+z*j] += dp[c-1][i];
      }
    }
    int ans = 0;
    for(int i = 1; i <= k; i ++)
      ans += dp[i][150+n];
    cout << ans;
}