import math
from heapq import heappush, heappop
N = int(raw_input())
C = int(raw_input())
V = int(raw_input())
S = map(int, raw_input().split())
T = map(int, raw_input().split())
Y = map(int, raw_input().split())
M = map(int, raw_input().split())

adjList = [ [] for i in range(N) ]
for (s,t,y,m) in zip(S,T,Y,M):
   adjList[s-1].append((t-1,y,m))

minDist = [7500000 for i in range(N)]
heap = []
heappush(heap, (0,0,C) )
while len(heap) != 0:
   (time, pos, cost) = heappop(heap)
   if pos == N-1:
      print time
      exit()
   for (t,y,m) in adjList[pos]:
      if cost - y >= 0:
         heappush( heap, (time+m, t, cost-y) )

print -1