#!/usr/bin/env python3.8
# %%
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
from collections import deque

# %%
N, D, K, *X = map(int, read().split())

# %%


def gen_cand():
    q = deque([0])
    for k, x in enumerate(X[1:], 1):
        while q[0] < k - D:
            q.popleft()
        j = q[0]
        diff = x - X[j]
        yield j, k, diff
        while q and X[q[-1]] > x:
            q.pop()
        q.append(k)


# %%
best = 0, 0, 0
for j, k, x in gen_cand():
    if best[2] < x:
        best = j, k, x
if best[2] == 0:
    print(0)
else:
    print(best[2] * K)
    print(best[0], best[1])