题解 | 二维斐波那契数列
二维斐波那契数列
https://www.nowcoder.com/practice/a1951ca9431646ff8f9bc6f6d24d1e0a
n,m=map(int,input().split())
l=[[0 for _ in range(m)] for _ in range(n)]
l[0][0]=1
for i in range(1,n):
l[i][0]=l[i-1][0]
for j in range(1,m):
l[0][j]=l[0][j-1]
for i in range(1,n):
for j in range(1,m):
l[i][j]=l[i-1][j]+l[i][j-1]
print(l[n-1][m-1]%(10**9+7))
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