#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll INF = 1e9+7;
ll MOD = 998244353;
typedef pair<ll,ll> ii;
#define iii pair<ll,ii>
#define f(i,a,b) for(ll i = a;i < b;i++)
#define pb push_back
#define vll vector<ll>
#define F first
#define S second
#define all(x) (x).begin(), (x).end()
///I hope I will get uprating and don't make mistakes
///I will never stop programming
///sqrt(-1) Love C++
///Please don't hack me
///@TheofanisOrfanou Theo830
///Think different approaches (bs,dp,greedy,graphs,shortest paths,mst)
///Stay Calm
///Look for special cases
///Beware of overflow and array bounds
///Think the problem backwards
///Deltix Round, Spring 2021 (open for everyone, rated, Div. 1 + Div. 2)
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
uniform_int_distribution<ll> distr;
ll rnd(ll a, ll b){return distr(rng)%(b-a+1)+a;}
#include "tickets.h"
/*
long long find_maximum(int k, std::vector<std::vector<int>> d);
void allocate_tickets( std::vector<std::vector<int>> _x);
static int n;
static int m;
static int k;
static std::vector<std::vector<int>> d;
static std::vector<std::vector<int>> x;
static int called = 0;
static void check(bool cond, std::string message) {
if (!cond) {
printf("%s\n", message.c_str());
exit(0);
}
}
void allocate_tickets( std::vector<std::vector<int>> _d) {
check(!called, "allocate_tickets called more than once");
d = _d;
check((int)d.size() == n, "allocate_tickets called with parameter of wrong size");
for (int i = 0; i < n; i++) {
check((int)d[i].size() == m, "allocate_tickets called with parameter of wrong size");
}
called = 1;
}
int main() {
assert(scanf("%d %d %d", &n, &m, &k) == 3);
x.resize(n);
for (int i = 0; i < n; i++) {
x[i].resize(m);
for (int j=0; j < m; j++) {
assert(scanf("%d", &x[i][j]) == 1);
}
}
fclose(stdin);
long long answer = find_maximum(k, x);
check(called, "failure to call allocate_tickets");
printf("%lld\n", answer);
for (int i = 0; i < n; i++) {
for (int j = 0; j < m; j++) {
if (j) printf(" ");
printf("%d", d[i][j]);
}
printf("\n");
}
fclose(stdout);
return 0;
}
*/
ll find_maximum(int k, vector<vector<int>> x) {
ll n = x.size();
ll m = x[0].size();
vector<vector<int> > answer;
f(i,0,n){
vector<int>ex;
ex.assign(m,-1);
answer.pb(ex);
}
ll ans = 0;
ll op = 0;
ll l[n] = {0},r[n];
f(i,0,n){
r[i] = m-1;
}
while(k--){
priority_queue<ii>pq;
f(i,0,n){
ans -= x[i][l[i]];
pq.push(ii(x[i][r[i]] + x[i][l[i]],i));
}
bool ek[n] = {0};
while(pq.size() != n/2){
ii f = pq.top();
ll pos = f.S;
ans += f.F;
ek[pos] = 1;
answer[pos][r[pos]] = op;
r[pos]--;
pq.pop();
}
f(i,0,n){
if(!ek[i]){
answer[i][l[i]] = op;
l[i]++;
}
}
op++;
}
allocate_tickets(answer);
return ans;
}
