import sequtils,strutils,algorithm
var
    P1 = stdin.readline.parseInt
    P2 = stdin.readline.parseInt
    R = newSeq[int](0)
    N = stdin.readline
    cnt = 0
    
for line in stdin.lines:
    R.add(line.parseInt)
    
R.sort(system.cmp)
for i,r in R:
    if i > 0 and r == R[i - 1]:
        cnt += 1
echo cnt * (P1 + P2)