题解 | #游游的you矩阵#思路这么质朴为什么就是想不到啊啊

matrix = [input() for _ in range(r)]

target = ('y', 'o', 'u')

r_d = [{} for _ in range(r)]
c_d = [{} for _ in range(c)]

for i in range(r):
    for j in range(c):
        item = matrix[i][j]
        if item in target:
            r_d[i][item] = r_d[i].get(item, 0) + 1
            c_d[j][item] = c_d[j].get(item, 0) + 1

ans = 0

for i in range(r):
    for j in range(c):
        item = matrix[i][j]
        if item == target[0]:
            ans += r_d[i].get(target[1], 0) * c_d[j].get(target[2], 0) + r_d[i].get(target[2], 0) * c_d[j].get(target[1], 0)
        elif item == target[1]:
            ans += r_d[i].get(target[0], 0) * c_d[j].get(target[2], 0) + r_d[i].get(target[2], 0) * c_d[j].get(target[0], 0)
        elif item == target[2]:
            ans += r_d[i].get(target[0], 0) * c_d[j].get(target[1], 0) + r_d[i].get(target[1], 0) * c_d[j].get(target[0], 0)

print(ans)