N, D, K = map(int, input().split()) 

xs = [(index, int(input())) for index, i in enumerate(range(N)) ] 
#print(xs)

ans = []
for start in range(len(xs)-1):
  for end in range(start+1, start+D+1):
    try:
      r, l = xs[start], xs[end]
      delta = l[1] - r[1]
      tuple = (r[0], l[0])
      ans.append( (tuple, delta) )
    except:
      ...

ans = sorted(ans, key=lambda x:x[1]*-1)

ans_size = ans[0][1]

ans = sorted( [a[0] for a in ans if a[1] == ans_size] )
if ans_size == 0:
  print(0)
else:
  print(ans_size*K)
  print(ans[0][0], ans[0][1])