from __future__ import print_function
import sys

s, e      = map(int, sys.stdin.readline().split())
es        = map(int, sys.stdin)

OK        = [ [0]*(s+1) for i in xrange(e+1) ]
OK[0][0]  = 1

for i in xrange(e):
  for j in xrange(s+1):
    if OK[i][j]: OK[i+1][j] = 1
    if es[i] > j: continue
    if OK[i][j-es[i]]: OK[i+1][j] = 2

ns = []; i, j = e, s
while i > 0 and j >= 0:
  x = OK[i][j]
  if x == 2:
    ns.append(i-1)
    i -= 1
    j -= es[i]
  else:
    i -= 1

# print(ns)
# import pprint; pprint.pprint(OK)

print(e+1)
k, l = 1, 3
for n in ns[:-1]:
  print(k, l, es[n])
  k = l; l += 1
print(k, 2, es[ns[-1]])
ns = set(ns); k = 2
for i,j in enumerate(es):
  if i not in ns:
    print(k, l, j)
    k = l; l += 1