import sys
input=sys.stdin.readline
write=sys.stdout.write

N=int(input())

B=list(range(N+1))
B_inv=list(range(N+1))

K=int(input())
for _ in range(K):
    x,y=map(int,input().split())
    p,q=B[x],B[y]
    B[x],B[y]=B[y],B[x]
    B_inv[p],B_inv[q]=y,x

A=[0]+list(map(int,input().split()))
X=[]
for i in range(1,N+1):
    t=B_inv[A[i]]
    for y in range(t,i,-1):
        x=y-1
        X.append("{} {}".format(x,y))
        p,q=B[x],B[y]
        B[x],B[y]=B[y],B[x]
        B_inv[p],B_inv[q]=y,x

print(len(X))
write("\n".join(X))