import numpy as np
def count(row,colum):
    num=0
    for i in range(row):
        for j in range(colum):
            if A[i][j] == 'W':
                num += 1
    return num
#入力ゾーン
A = np.array([['W','W','R','W'],
            ['W','R','W','W'],
            ['W','W','W','R']])

#出力ゾーン
print('塗る回数',count(A.shape[0],A.shape[1]))