import sys,datetime
input=lambda:sys.stdin.readline().rstrip()
N,C,V=[int(input()) for i in range(3)]
S,T,Y,M=[list(map(int,input().split())) for i in range(4)]
con=[[] for i in range(N)]
for i in range(V):
	con[S[i]-1].append(i)
dp=[[float('inf') for i in range(C+1)] for j in range(N)]
dp[0][C]=0
for i in range(N):
	for j in range(C,-1,-1):
		for k in con[i]:
			if j-Y[k]>=0:
				dp[T[k]-1][j-Y[k]]=min(dp[T[k]-1][j-Y[k]],dp[i][j]+M[k])
ans=min(dp[N-1])
print(-1 if ans==float('inf') else ans)