#include <stdio.h>
int dp[201][201];
const int mod=1000000000;
int bottom_up(int n, int k) {
//기저 세로
for(int i=1; i<=n; i++) {
dp[i][1]=1;
}
//가로
for(int i=0; i<=k; i++) {
dp[0][i]=1;
}
//잘몬된 기저임
// for(int i=1; i<=k; i++) {
// dp[1][i]=i;
// }
for(int i=1; i<=n; i++) {
for(int j=2; j<=k; j++) {
dp[i][j]=(dp[i][j-1]+dp[i-1][j])%mod;
}
}
return dp[n][k]%mod;
}
int main() {
int n,k;
scanf("%d %d",&n, &k);
printf("%d",bottom_up(n,k));
return 0;
}
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