代码：

def fun(cin=[]):
    sum=0
    for i in cin:
        sum+=i
    variance=0
    for i in cin:
        variance+=(i-sum/m)**2
    variance=variance
    return variance
hc=input()
m=int(hc.split(' ')[0])
n=int(hc.split(' ')[1])
sj=[]
for i in range(n):
    hc=input()
    hc=hc.split(' ')
    hc=list(map(float,hc))
    sj.append(fun(hc))
for i in range(n):
    hc=input()
    hc=hc.split(' ')
    hc=list(map(int,hc))
    sj[i]+=fun(hc)
answer=[]
for i in range(n-1):
    for j in range(n-1-i):
        if sj[j]-sj[j+1]>0.0000001:
            answer.append([j,j+1])
            t=sj[j]
            sj[j]=sj[j+1]
            sj[j+1]=t
n=len(answer)
print(n)
for i in answer:
    print(i[0]+1,i[1]+1)