from math import inf


def main():
    N, K, X = map(int, input().split())
    A = list(map(int, input().split()))

    dp_table = [[inf, inf] for _ in range(N+1)]
    dp_table[0][0] = 0

    for day, problem_num in enumerate(A, 1):
        dp_table[day][0] = min(dp_table[day-1]) + problem_num
        dp_table[day][1] = min(dp_table[day-1][0] + X, dp_table[day-1][1]) + K
    
    print(min(dp_table[N]))


if __name__ == "__main__":
    main()