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([])
    for i in range(N):
        if q and q[0][1] < i - D:
            q.popleft()
        if q and X[i] - q[0][0] > ans:
            ans = X[i] - q[0][0]
            L = q[0][1]
            R = i
        if (not q) or (q[-1][0] <= X[i]):
            q.append((X[i],i))
    if L < 0:
        print(0)
    else:
        print(ans * K)
        print(L,R)
if __name__ == '__main__':
    main()