#include <iostream>
#include <vector>
#include <algorithm>
#include <queue>
using namespace std;

struct edge {
	long long to, cap, rev;
};

class Max_Flow {
public:
	vector<vector<edge>> G;
	vector<long long>level, iter;

	void init(long long size_) {
		G.resize(size_);
		level.resize(size_);
		iter.resize(size_);
	}

	void add_edge(long long from, long long to, long long cap) {
		G[from].push_back(edge{ to, cap, (long long)G[to].size() });
		G[to].push_back(edge{ from, 0, (long long)G[from].size() - 1 });
	}

	void bfs(long long s) {
		for (long long i = 0; i < level.size(); i++) level[i] = -1;
		queue<long long> que;
		level[s] = 0;
		que.push(s);
		while (!que.empty()) {
			long long v = que.front(); que.pop();
			for (long long i = 0; i < G[v].size(); i++) {
				edge &e = G[v][i];
				if (e.cap > 0 && level[e.to] < 0) {
					level[e.to] = level[v] + 1;
					que.push(e.to);
				}
			}
		}
	}

	long long dfs(long long v, long long t, long long f) {
		if (v == t) return f;
		for (long long &i = iter[v]; i < G[v].size(); i++) {
			edge &e = G[v][i];
			if (e.cap > 0 && level[v] < level[e.to]) {
				long long d = dfs(e.to, t, min(f, e.cap));
				if (d > 0) {
					e.cap -= d;
					G[e.to][e.rev].cap += d;
					return d;
				}
			}
		}
		return 0;
	}

	long long max_flow(long long s, long long t) {
		long long flow = 0;
		for (;;) {
			bfs(s);
			if (level[t] < 0) return flow;
			for (int i = 0; i < iter.size(); i++) iter[i] = 0;
			long long f;
			while ((f = dfs(s, t, (1LL << 60))) > 0) {
				flow += f;
			}
		}
	}
};

long long n, m, p, a[1009], b[1009], c[1009], d[1009], e[1009]; vector<pair<long long, long long>>L;

int main() {
	cin >> n >> m >> p;
	for (int i = 0; i < m; i++) {
		cin >> a[i] >> b[i] >> c[i] >> d[i] >> e[i]; d[i] += p;
		L.push_back(make_pair(a[i], c[i]));
		L.push_back(make_pair(b[i], d[i]));
	}
	sort(L.begin(), L.end()); Max_Flow X; X.init(L.size() + 4);
	for (int i = 0; i < m; i++) {
		int pos1 = lower_bound(L.begin(), L.end(), make_pair(a[i], c[i])) - L.begin();
		int pos2 = lower_bound(L.begin(), L.end(), make_pair(b[i], d[i])) - L.begin();
		X.add_edge(pos1, pos2, e[i]);
	}
	for (int i = 1; i < L.size(); i++) {
		if (L[i].first == L[i - 1].first) X.add_edge(i - 1, i, (1LL << 60));
	}
	for (int i = 0; i < L.size(); i++) {
		if (L[i].first == 1) X.add_edge(L.size(), i, (1LL << 60));
		if (L[i].first == n) X.add_edge(i, L.size() + 1, (1LL << 60));
	}
	cout << X.max_flow(L.size(), L.size() + 1) << endl;
	return 0;
}