import sys
from math import sqrt, pi, sin
inp = lambda : sys.stdin.readline()[:-1]
mii = lambda x = " ": [*map(int,input().split(x))]
mfi = lambda x = " ": [*map(float,input().split(x))]
ii = lambda : int(input())
def f(num, a, b):
d = bin(num)[2:]
return d.count("0") * a + d.count("1") * b
N, a, b = mii()
ans = 0
for _ in range(N):
k, *l = mii()
for i in l:
ans += f(i, a, b)
print(ans)