N = int(input())

XY = [list(map(int,input().split())) for _ in range(int(input()))]
AMIDA = [0]+list(map(int,input().split()))

for x,y in XY:
    AMIDA[x],AMIDA[x+1] = AMIDA[x+1],AMIDA[x]
ANS = []
for i in range(N+1):
    pos = AMIDA.index(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)