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#include <bits/stdc++.h>

using namespace std;

#define fi first
#define se second

typedef long long ll;

const int MAXN = 1e6 + 7;
const ll INF = 1e18;

bool comp(const pair<int, ll>& a, const pair<int, ll>& b){

	return a.se > b.se;
}

void solve(){

	int n, m;
	ll k;
	cin >> n >> m >> k;

	vector<vector<ll>> a(n, vector<ll>(m));

	for(int i = 0; i < n; i++){

		for(int j = 0; j < m; j++){

			cin >> a[i][j];
		}
	}

	vector<ll> pojedyncze;
	vector<pair<int, ll>> cale;
	vector<vector<ll>> pref_cale;

	for(int i = 0; i < n; i++){

		if(a[i][0] >= a[i][m - 1]){

			for(int j = 0; j < m; j++){

				pojedyncze.push_back(a[i][j]);
			}
		}
		else {

			ll s = 0;
			vector<ll> pref(m + 1, 0);

			for(int j = 0; j < m; j++){

				s += a[i][j];
				pref[j + 1] = s;
			}

			cale.push_back({(int)pref_cale.size(), s});
			pref_cale.push_back(pref);
		}
	}

	sort(pojedyncze.begin(), pojedyncze.end(), greater<ll>());
	int ile_poj = pojedyncze.size();
	vector<ll> pref_poj(ile_poj + 1, 0);

	for(int i = 0; i < ile_poj; i++){

		pref_poj[i + 1] = pref_poj[i] + pojedyncze[i];
	}

	sort(cale.begin(), cale.end(), comp);
	int ile_calych = cale.size();
	vector<ll> sum_calych(ile_calych + 1, 0);

	for(int i = 0; i < ile_calych; i++){

		sum_calych[i + 1] = sum_calych[i] + cale[i].se;
	}

	ll wyn = 0;

	for(int c = 0; c <= ile_calych; c++){

		ll reszta = k - (ll)c * m;

		if(reszta >= 0 && reszta <= ile_poj){

			wyn = max(wyn, sum_calych[c] + pref_poj[reszta]);
		}
	}

	if(m > 1){

		for(int j = 1; j < m; j++){

			ll zostalo = k - j;

			if(zostalo < 0) continue;

			vector<ll> wart1(ile_calych, -INF);
			vector<ll> wart2(ile_calych, -INF);

			for(int c = 0; c < ile_calych; c++){

				ll reszta = zostalo - (ll)c * m;

				if(reszta >= 0 && reszta <= ile_poj){

					wart1[c] = sum_calych[c] + pref_poj[reszta];
					wart2[c] = sum_calych[c + 1] + pref_poj[reszta];
				}
			}

			vector<ll> pref_maks(ile_calych, -INF);
			vector<ll> suf_maks(ile_calych, -INF);

			if(ile_calych > 0){

				pref_maks[0] = wart1[0];

				for(int c = 1; c < ile_calych; c++){

					pref_maks[c] = max(pref_maks[c - 1], wart1[c]);
				}

				ll akt_maks = -INF;

				for(int x = ile_calych - 2; x >= 0; x--){

					akt_maks = max(akt_maks, wart2[x + 1]);
					suf_maks[x] = akt_maks;
				}

				suf_maks[ile_calych - 1] = -INF;

				for(int x = 0; x < ile_calych; x++){

					ll najl = pref_maks[x];

					if(suf_maks[x] != -INF){

						najl = max(najl, suf_maks[x] - cale[x].se);
					}

					if(najl != -INF){

						int org_id = cale[x].fi;
						wyn = max(wyn, pref_cale[org_id][j] + najl);
					}
				}
			}
		}
	}

	cout << wyn << '\n';
}

bool multi = 0;

int main(){

	ios_base::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);

	int t = 1;
	if(multi) cin >> t;
	while(t--){

		solve();
	}

	return 0;
}