N = int(input())
AMIDA = list(range(0,N+1))
K = int(input())
for i in range(K):
    x,y =map(int,input().split())
    AMIDA[x],AMIDA[x+1] = AMIDA[x+1],AMIDA[x]
A = [0]+list(map(int,input().split()))
ANS = []
for i in range(N+1):
    pos = AMIDA.index(A[i])
    for j in reversed(range(i,pos)):
        ANS.append(j)
        AMIDA[j-1],AMIDA[j] = AMIDA[j],AMIDA[j-1]
print(len(ANS))
for ans in ANS:
    print(ans,ans+1)