INF=-1000000007
SQRT_N = 512
N,D,K = map(int,input().split())
x = [int(input()) for i in range(N)]
b_size = (N + SQRT_N - 1) // SQRT_N
bucket = [(INF,INF) for i in range(b_size * SQRT_N)]
bucketMax = [(INF,INF) for i in range(b_size)]

def query(left,right):
	ret = (INF,INF)
	for i in range(left // SQRT_N, right // SQRT_N + 1):
		l = i * SQRT_N
		r = (i+1) * SQRT_N
		if right <= l:
			break
		if r <= left or right <= l:
			continue
		if left <= l and r <= right:
			ret = max(ret,bucketMax[i])
		else:
			s,t = max(left,l),min(right,r)
			ret = max(ret, max(bucket[s:t]))

	return ret

for i in range(N):
	bucket[i] = (x[i],-i)
for i in range(N):
	k = i // SQRT_N
	bucketMax[k] = max(bucketMax[k],bucket[i])
ans,pair = 0,()
for i in range(N-1):
	ret = query(i+1,min(N,i+D+1))
	if ans < ret[0]-x[i]:
		ans = ret[0]-x[i]
		pair = (i,-ret[1])
if ans <= 0:
	print(0)
else:
	print(ans*K)
	print(' '.join([str(_) for _ in pair]))