# Peanut Butter Problem¶

Given peanut, a 4x5 array of 0s, and butter, a 5-element 1-d array of indices, fill the rows of peanut with 1s starting from the column indices given by butter.

import numpy as np

peanut = np.zeros(shape = (4, 5))
butter = np.array([3, 0, 4, 1])

print(peanut)
# [[0. 0. 0. 0. 0.]
#  [0. 0. 0. 0. 0.]
#  [0. 0. 0. 0. 0.]
#  [0. 0. 0. 0. 0.]]

print(butter)
# [3 0 4 1]