import sequtils,strutils,deques

var
    N,D,K : int
    x,M,m,sd,bd : int
    deq = initDeque[int](1024)
(N,D,K) = stdin.readline.split.map(parseInt)
var X = newSeq[int](N)
M = 0
for n in 0..<N:
    x = stdin.readline.parseInt
    X[n] = x
    if deq.len > 0:
        if deq.peekFirst + D < n:
            deq.popFirst
        if deq.len > 0 and x - X[deq.peekFirst] > M:
            M = x - X[deq.peekFirst]
            bd = deq.peekFirst
            sd = n
        while deq.len > 0 and X[deq.peekLast] > x:
            deq.popLast
    deq.addLast(n)
var ans : int64
ans = M.int64 * K.int64
echo ans
if ans > 0:
    echo bd," ",sd