#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (ll i = 0; i < (ll)(n); i++)
#define ll long long
#define MOD 1000000007
#define MOD2 998244353
#define INF 1e9

struct edge{
    ll to, cap, rev, p, q;
};

vector<vector<edge>> G;
vector<ll> used;
ll n, m;

void add_edge(ll u, ll v, ll c, ll p, ll q){
    G[u].push_back((edge){v, c, (ll)G[v].size(), p, q});
    G[v].push_back((edge){u, 0, (ll)G[u].size()-1, (ll)INF, p});
}

ll dfs(ll v, ll t, ll f, int time){
    if(time > 1e9)return 0;
    if(v == t)return f;
    used[v] = 1;
    rep(i, G[v].size()){
        edge &e = G[v][i];
        if(time > G[v][i].p) continue;
        if(e.cap > 0 && !used[e.to]){
            ll d = dfs(e.to, t, min(f, e.cap), G[v][i].q);
            if(d > 0){
                G[v][i].cap -= d;
                G[e.to][e.rev].cap += d;
                return d;
            }
        }
    }
    return 0;
}

ll max_flow(ll s, ll t){
    ll flow = 0;
    for(;;){
        for(ll i=0; i<n; i++)used[i] = 0;
        ll f = dfs(s, t, INF, 0);
        if(f == 0)return flow;
        flow += f;
    }
}

int main(void){
    ll d;
    cin >> n >> m >> d;
    G.resize(n);
    used.resize(n);
    rep(i, m){
        ll u, v, p, q, w;
        cin >> u >> v >> p >> q >> w;
        u--, v--;
        if(u != 0)add_edge(u, v, w, p-d, q);
        else add_edge(u, v, w, p, q);
    }
    cout << max_flow(0, n-1) << endl;
    return 0;
}