```
def uniquePaths(self, m, n):
table = [[0 for x in range(n)] for x in range(m)]
for i in range(m):
table[i][0] = 1
for i in range(n):
table[0][i] = 1
for i in range(1,m):
for j in range(1,n):
table[i][j] = table[i-1][j] + table[i][j-1]
return table[m-1][n-1]
```