import sys
sys.setrecursionlimit(10000000)
MOD = 10 ** 9 + 7
INF = 10 ** 15

from collections import deque,defaultdict,Counter
def main():
    N,D,K = map(int,input().split())
    X = [int(input()) for _ in range(N)]

    ans = 0
    L,R = -1,-1
    q = deque([0])
    for i in range(1,N):
        if q[0] < i - D:
            q.popleft()
        if ans < X[i] - X[q[0]]:
            ans = X[i] - X[q[0]]
            L = q[0]
            R = i
        while q and X[q[-1]] > X[i]:
            q.pop()
        q.append(i)
    if L < 0:
        print(0)
    else:
        print(ans * K)
        print(L,R)
if __name__ == '__main__':
    main()