inf=10**18
s=0
N,K,X=map(int,input().split())
A=list(map(int,input().split()))
dp=[[inf,inf]for i in range(N+1)]
dp[0][0]=0
dp[0][1]=X
for i in range(N):
  dp[i+1][0]=min(dp[i+1][0],dp[i][0]+A[i])
  dp[i+1][1]=min(dp[i+1][1],dp[i][0]+X+K)
  dp[i+1][0]=min(dp[i+1][0],dp[i][1]+A[i])
  dp[i+1][1]=min(dp[i+1][1],dp[i][1]+K)
print(min(dp[N]))