#include <iostream>
#include <vector>
#include <algorithm>
#include <map>
#include <queue>
#include <set>
#include <iomanip>
using namespace std;
typedef long long ll;
#define rep(i, n) for(int i = 0; i < (n); i++)

template<class T>
using vi = vector<T>;

template<class T>
using vii = vector<vi<T>>;

template<class T>
using viii = vector<vii<T>>;

struct FF {
    struct edge {
        int to, rev; ll cap;
    };

    int n;
    vii<edge> to;
    vi<bool> visited;

    FF(int n_ = 1) : n(n_), to(n_){}

    void addedge(int u, int v, ll c) {
        int su = (int)to[u].size();
        int sv = (int)to[v].size();

        to[u].push_back({ v, sv, c });
        to[v].push_back({ u, su, 0 });
    }

    ll dfs(int v, int t, ll f = 1e18) {
        if (v == t) return f;
        visited[v] = true;
        for (edge& nv : to[v]) {
            if (visited[nv.to] || nv.cap == 0) continue;
            ll nf = dfs(nv.to, t, min(f, nv.cap));
            if (nf > 0) {
                nv.cap -= nf;
                to[nv.to][nv.rev].cap += nf;
                return nf;
            }
        }
        return 0; //忘れがち
    }

    ll maxflow(int s, int t) {
        ll res = 0, flow = 0;
        do {
            visited.assign(n, false);
            flow = dfs(s, t);
            res += flow;
        } while (flow);
        return res;
    }
};

int main()
{
    int n, m, d;
    cin >> n >> m >> d;
    vi<int> u(m), v(m), p(m), q(m); vi<ll> w(m);
    rep(i, m) cin >> u[i] >> v[i] >> p[i] >> q[i] >> w[i];
    rep(i, m) u[i]--, v[i]--;
    rep(i, m) q[i] += d;
    vi<map<int, int>> mp(n);
    rep(i, m) {
        mp[u[i]][p[i]];
        mp[v[i]][q[i]];
    }

    const ll inf = 1e18;
    FF ff(n * m);
    int idx = 0;
    rep(i, n) {
        bool ng = true;
        for (auto& elem : mp[i]) {
            elem.second = idx;
            if (ng) ng = false;
            else ff.addedge(idx - 1, idx, inf);
            idx++;
        }
    }

    rep(i, m) ff.addedge(mp[u[i]][p[i]], mp[v[i]][q[i]], w[i]);

    ll res = ff.maxflow(0, idx - 1);
    cout << res << endl;

    return 0;
}