import scipy.special

def Lattice(row,col):
    if row == 0 or col == 0:
        return(1)
    return Lattice(row-1, col) + Lattice(row, col-1)
def main():
    #print(Lattice(20,20))
    print(scipy.special.comb(40,20))

if __name__ == '__main__':
    main()

de5c32187ec95d337130a5a45915d12ec8272063
<mask token>

<mask token>


def Lattice(row, col):
    if row == 0 or col == 0:
        return 1
    return Lattice(row - 1, col) + Lattice(row, col - 1)


def main():
    print(scipy.special.comb(40, 20))


<mask token>

<mask token>


def Lattice(row, col):
    if row == 0 or col == 0:
        return 1
    return Lattice(row - 1, col) + Lattice(row, col - 1)


def main():
    print(scipy.special.comb(40, 20))


if __name__ == '__main__':
    main()

import scipy.special


def Lattice(row, col):
    if row == 0 or col == 0:
        return 1
    return Lattice(row - 1, col) + Lattice(row, col - 1)


def main():
    print(scipy.special.comb(40, 20))


if __name__ == '__main__':
    main()

import scipy.special

def Lattice(row,col):
    if row == 0 or col == 0:
        return(1)
    return Lattice(row-1, col) + Lattice(row, col-1)
def main():
    #print(Lattice(20,20))
    print(scipy.special.comb(40,20))

if __name__ == '__main__':
    main()
