import sys
input = sys.stdin.readline
from collections import defaultdict
INF = 10**13

def dfs_for_Ford_Fulkerson(N,E,capacity,s,g,flowing):
    stack = [(s,INF)]
    root = [0]*N
    root[s] = -1
    V = [False]*N
    V[s] = True
    while stack:
        u, flow = stack.pop()
        for v in E[u]:
            if not V[v] and capacity[(u,v)] > 0:
                root[v] = u
                V[v] = True
                if v == g:
                    if capacity[(u,v)] < flow:
                        flow = capacity[(u,v)]
                    break
                stack.append((v, min(flow, capacity[(u,v)])))
        else:
            continue
        break
    else:
        return False
    now = g
    while now != s:
        before = root[now]
        capacity[(before, now)] -= flow
        capacity[(now, before)] += flow
        now = before
    flowing[0] += flow
    return True

def Ford_Fulkerson(N,E,capacity, s, g):
    flowing = [0]
    while dfs_for_Ford_Fulkerson(N,E,capacity,s,g, flowing):
        pass
    return flowing[0]

def main():
    N, M, d = map( int, input().split())
    UVPQW = [ tuple( map( int, input().split())) for _ in range(M)]
    L = 10**9
    X = [(u << 32)+p for u,_,p,_,_ in UVPQW]
    Y = [(v << 32)+q+d for _,v,_,q,_ in UVPQW]
    nodes = sorted(set(X+Y))
    VtoI = {x: i for i, x in enumerate(nodes)}
    L = len(nodes)
    s = L
    g = L+1
    G = [[] for _ in range(L+2)]
    capacity = defaultdict( int)
    u, t = divmod(nodes[0], 1<<32)
    if u == 1:
        G[s].append(0)
        capacity[(s,0)] = INF
        G[0].append(s)
    u, t = divmod(nodes[-1], 1<<32)
    if u == N:
        G[L-1].append(g)
        capacity[(L-1,g)] = INF
        G[g].append(L-1)

    for i, (x, y) in enumerate(zip(nodes, nodes[1:])):
        if x >> 32 == y >> 32:
            G[i].append(i+1)
            capacity[(i,i+1)] = INF
            G[i+1].append(i)

    W = [ w for _,_,_,_,w in UVPQW]
    for x, y, w in zip(X, Y, W):
        a = VtoI[x]
        b = VtoI[y]
        G[a].append(b)
        capacity[(a,b)] += w
        G[b].append(a)
    # print(L+2)
    print( Ford_Fulkerson(L+2,G,capacity,s,g))
    
if __name__ == '__main__':
    main()