import sys
input = sys.stdin.readline

N=int(input())

EDGE=[]
for i in range(1,N):
    EDGE.append((i,i+1,i*2-1))

for i in range(3,N+1):
    EDGE.append((2,i,i*2-2))

print(len(EDGE))
for x,y,c in EDGE:
    print(x,y,c)

for i in range(1,N+1):
    for j in range(i+1,N+1):
        if i==1:
            ANS=[]
            for k in range(2,j+1):
                ANS.append(k-1)

            print(len(ANS),*ANS)
        else:
            ANS=[]
            for k in range(i,2,-1):
                ANS.append(k-1)

            ANS.append(N+i-2)
            #print(ANS)

            for k in range(i+1,j):
                ANS.append(k)

            print(len(ANS),*ANS)