import bisect
def main():
    N,D,K = map(int, input().split())
    values = [int(input()) for i in range(N)]

    h_window = dcopy(values[:D])
    h_window.sort()

    minimum = min(values[:D])
    w_min_index = values[:D].index(minimum)
    min_index = values[:D].index(minimum)
    maximum = max(values[:D+1])
    max_index = values[:D+1].index(maximum)

    MAX = maximum - minimum

    for j in range(D+1, N):
        del h_window[bisect.bisect_left(h_window, values[j-D-1])]

        if len(h_window) == 0:
            w_min_index = j-1
        elif values[j-1] < h_window[0]:
            w_min_index = j-1

        bisect.insort(h_window, values[j-1])
        minimum = h_window[0]
        tmp = values[j] - minimum
        if tmp > MAX:
            MAX = tmp
            max_index = j
            min_index = w_min_index

    # print(MAX, min_index, max_index)

    if MAX <= 0:
        print(0)
    else:
        print(K*MAX)
        print(min_index, max_index)