k = int(input())
d = sorted(map(int, input().split()))

es = [(0, 1, d[0] // 2), (1, 2, d[0] // 2)]
s = [0, 2]
v = 1
nxt = 3
for i in range(1, k):
    es.append((v, nxt, (d[i] - d[i-1]) // 2))
    es.append((nxt, nxt + 1, d[i] // 2))
    s.append(nxt + 1)
    v = nxt
    nxt += 2
print(nxt)
for u, v, w in es:
    print(u + 1, v + 1, w)
print(len(s))
print(*(x + 1 for x in s))