tyvj1008 传球游戏

#include<iostream>
#include<cstdio>
#include<string>
#include<cstring>
#include<algorithm>
using namespace std;
int n,m,f[105][105];
int main(){
    cin>>n>>m;
    f[0][1] = 1;
    for(int i = 1;i <= m;i++){
        f[i][1] = f[i-1][2] + f[i-1][n];
        f[i][n] = f[i-1][n-1] + f[i-1][1];
        for(int j = 2;j < n;j++){
            f[i][j] = f[i-1][j-1] + f[i-1][j+1];
        }
    }
    cout<<f[m][1];
    return 0;
}