n = int(input())
nn = n // 3
ans = []
x, xx = 0, 0
while xx <= nn:
    k = n + xx
    yy = x << 1
    yyy = yy * yy
    while yyy <= k:
        if yy == 0 or k % yy > 0:
            yyy += (yy << 1) | 1
            yy += 1
            continue
        y, z = yy - x, k // yy - x
        if x != y and y != z:
            ans.append([x, y, z])
            ans.append([x, z, y])
            ans.append([y, x, z])
            ans.append([y, z, x])
            ans.append([z, x, y])
            ans.append([z, y, x])
        elif x != y or y != z:
            ans.append([x, y, z])
            ans.append([y, z, x])
            ans.append([z, x, y])
        else:
            ans.append([x, y, z])
        yyy += (yy << 1) | 1
        yy += 1
    xx += (x << 1) | 1
    x += 1
print(len(ans))
for i in ans:
    print(*i)