#Dinic法で最大流を求める
#deque のimport が必要
#逆辺追加しなきゃいけないから、
#グラフの構成はadd_edgeで行う
#最大流は　flow    メソッドで

from collections import deque
class Dinic:
    def __init__(self,N):
        self.N = N
        self.G = [[] for _ in range(N)]
        self.level = None
        self.progress = None
        self.edge = []
    def add_edge(self,fr,to,cap):
        forward = [to,cap,None]
        forward[2] = backward = [fr,0,forward]
        self.G[fr].append(forward)
        self.G[to].append(backward)
        self.edge.append(forward)
    def add_multi_edge(self,v1,v2,cap1,cap2):
        edge1 = [v2,cap1,None]
        edge1[2] = edge2 = [v1,cap2,edge1]
        self.G[v1].append(edge1)
        self.G[v2].append(edge2)
        self.edge.append(edge1)
    def get_edge(self,i):
        return self.edge[i]
        # i 回目に追加した辺のポインタを返す
        # 0-index, 順辺のみ

    def bfs(self,s,t):
        self.level = level = [None] * self.N
        q = deque([s])
        level[s] = 0
        G = self.G
        while q:
            v = q.popleft()
            lv = level[v] + 1
            for w,cap,_ in G[v]:
                if cap and level[w] is None:
                    level[w] = lv
                    q.append(w)
        return level[t] is not None
    def dfs(self, v, t, f):
        if v == t:
            return f
        level = self.level
        for e in self.it[v]:
            w, cap, rev = e
            if cap and level[v] < level[w]:
                d = self.dfs(w, t, min(f, cap))
                if d:
                    e[1] -= d
                    rev[1] += d
                    return d
                else:
                    pass
            else:
                pass
        return 0

    def flow(self, s, t):
        flow = 0
        INF = 10 ** 18
        G = self.G
        while self.bfs(s, t):
            *self.it, = map(iter, self.G)
            f = INF
            while f:
                f = self.dfs(s, t, INF)
                flow += f
        return flow
    def min_cut(self,s):
        #最小カットを実現する頂点の分割を与える
        #True  なら　source側
        #False なら　sink側
        visited = [False for i in range(self.N)]
        q = deque([s])
        while q:
            now = q.popleft()
            visited[now] = True
            for to,cap,_ in self.G[now]:
                if cap and not visited[to]:
                    visited[to] = True
                    q.append(to)
        return visited

N,M,dd = map(int,input().split())
G = [[] for _ in range(N)]
d = dict()

count = 0
for _ in range(M):
    u,v,p,q,w = map(int,input().split())
    u -= 1
    v -= 1
    G[u].append((v,p,q,w))
    d[(v,p,q,w)] = count
    count += 1
    
dinic = Dinic(M + 2 + M)
s = M + M
t = M + M + 1
inf = 10 ** 18
for v,p,q,w in d:
    count = d[(v,p,q,w)]
    for vv,pp,qq,ww in G[v]:
        count2 = d[(vv,pp,qq,ww)]
        if q + dd <= pp:
            dinic.add_edge(count + M,count2,inf)
    if v == N - 1:
        dinic.add_edge(count + M,t,inf)
    dinic.add_edge(count,count + M,w)
for v,p,q,w in G[0]:
    dinic.add_edge(s,d[(v,p,q,w)],inf)
print(dinic.flow(s,t))