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//Krzysztof Pieprzak
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef unsigned int uint;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef pair<int,int> pii;
typedef pair<long long, long long> pll;
typedef vector<pii> vpii;
typedef vector<pll> vpll;

#define Size(x) (int)x.size()
#define VAR(v,n) auto v = (n)
#define FOR(i,a,b) for(VAR(i,a); i < (b); ++i)
#define FORE(i,a,b) for(VAR(i,a); i <= (b); ++i)
#define FORREV(i,a,b) for(VAR(i,b); i >= (a); --i)
#define FORSTEP(i,a,b,step) for(VAR(i,a); i < (b); i += (step))
#define FOREACH(i,c) for(auto i : (c))
#define FOREACHS(i,c,n) for(VAR(i,&(c)[0]); i-(c)<(n); ++i)
#define ALL(x) x.begin(),x.end()
#define CLEAR(t) memset(t, 0, sizeof(t))
#define F first
#define S second
#define MP make_pair
#define PUB push_back
#define POB pop_back
#define pieprzu ios_base::sync_with_stdio(0);
#define debug_enabled false
#define debug(name) if(debug_enabled) cout << endl << name << endl; if(debug_enabled)

const int    INF = 1000000001;
const double EPS = 10e-9;

const int MAXNM = 300000;

ll t[MAXNM + 5];
vector<pair<ll, int>> ascRowsNegSumAndTabIdx_by0BasedRowIdx;
vector<ll> negElemsFromDescRows;

vll ascRowsTotalSums_upToNRows;

ll ascRows_takeNRowsAndReminderM[2 * MAXNM + 5];
ll tempTab[MAXNM + 5];

int getTabIdx(int in, int im, int m) {
    return in * m + im;
}

void rob(int test) {
    int n, m, k;
    scanf("%d %d %d", &n, &m, &k);
    
    ll sum;
    FOR (i, 0, n) {
        sum = 0;
        FOR (j, 0, m) {
            int tabIdx = getTabIdx(i, j, m);
            scanf("%lld", &t[tabIdx]);
            sum += t[tabIdx];
        }
        
        if (t[i * m] < t[i * m + m - 1]) { // ascending
            ascRowsNegSumAndTabIdx_by0BasedRowIdx.PUB(MP(-sum, getTabIdx(i, 0, m)));
        } else { // descending or constant
            FOR (j, 0, m) {
                negElemsFromDescRows.PUB(-t[getTabIdx(i, j, m)]);
            }
        }
    }
    
    n = Size(ascRowsNegSumAndTabIdx_by0BasedRowIdx);
    
    sort(ALL(ascRowsNegSumAndTabIdx_by0BasedRowIdx));
    sort(ALL(negElemsFromDescRows));
    
    sum = 0;
    ascRowsTotalSums_upToNRows.PUB(0);
    for (const auto& [negSum, tabIdx] : ascRowsNegSumAndTabIdx_by0BasedRowIdx) {
        sum += -negSum;
        ascRowsTotalSums_upToNRows.PUB(sum);
    }
    
    // asc rows results [0][0]=0 by default
    // asc rows results [1..n][0]
    FORE (i, 1, n) {
        ascRows_takeNRowsAndReminderM[getTabIdx(i, 0, m)] = ascRowsTotalSums_upToNRows[i];
    }
    
    // asc rows results [0..n-1][1..m-1]
    // sum(1..i) + max(pref_j(i+1..n))
    FORE (i, 0, n) {
        tempTab[i] = 0;
    }
    FOR (prefLen, 1, m) { // 1..m-1
        ll mx = -1;
        FORREV (i, 0, n - 1) { // n-1..0
            int orgTabIdx = ascRowsNegSumAndTabIdx_by0BasedRowIdx[i].S;
            tempTab[i] += t[orgTabIdx + prefLen - 1];
            mx = max(mx, tempTab[i]);
            
            int tabIdx = getTabIdx(i, prefLen, m);
            debug("loop") 
                cout << "[mx] take " << i << " rows and reminder " << prefLen << ":" << endl
                    << "\t cur pref = " << tempTab[i] << endl
                    << "\t mx = " << mx << endl
                    << "\t ascRowsTotalSums_upToNRows[i] = " << ascRowsTotalSums_upToNRows[i] << endl
                    << "\t tabIdx = " << tabIdx << endl
                    << "\t ascRows_takeNRowsAndReminderM[tabIdx] = " << ascRows_takeNRowsAndReminderM[tabIdx] << endl;
            ascRows_takeNRowsAndReminderM[tabIdx] = max(ascRows_takeNRowsAndReminderM[tabIdx], ascRowsTotalSums_upToNRows[i] + mx);
        }
    }
    
    debug("ascRows_takeNRowsAndReminderM")
        FORE (i, 0, n) {
            FOR (j, 0, m) {
                cout << ascRows_takeNRowsAndReminderM[getTabIdx(i,j,m)] << " ";
            }
            cout << endl;
        }
    
    // sum(1..i+1) - min(suf_(m-j)(1..i))
    FORE (i, 0, n) {
        tempTab[i] = 0;
    }
    FOR (sufLen, 1, m) {
        ll mn = -1;
        FOR (i, 1, n) {
            int orgTabIdx = ascRowsNegSumAndTabIdx_by0BasedRowIdx[i - 1].S;
            tempTab[i] += t[orgTabIdx + m - sufLen];
            if (mn == -1) {
                mn = tempTab[i];
            } else {
                mn = min(mn, tempTab[i]);
            }
            
            int tabIdx = getTabIdx(i, m - sufLen, m);
            debug("loop") 
                cout << "[mn] take " << i << " rows and remove suf len " << sufLen << " (reminder: " << m - sufLen << "):" << endl
                    << "\t cur suf = " << tempTab[i] << endl
                    << "\t mn = " << mn << endl
                    << "\t ascRowsTotalSums_upToNRows[i+1] = " << ascRowsTotalSums_upToNRows[i + 1] << endl
                    << "\t tabIdx = " << tabIdx << endl
                    << "\t ascRows_takeNRowsAndReminderM[tabIdx] = " << ascRows_takeNRowsAndReminderM[tabIdx] << endl;
            ascRows_takeNRowsAndReminderM[tabIdx] = max(ascRows_takeNRowsAndReminderM[tabIdx], ascRowsTotalSums_upToNRows[i + 1] - mn);
        }
    }
    
    debug("negElemsFromDescRows") FOREACH (negElem, negElemsFromDescRows) cout << negElem << endl;
    debug("ascRowsNegSumAndTabIdx_by0BasedRowIdx") for (auto [sum, pos] : ascRowsNegSumAndTabIdx_by0BasedRowIdx) cout << sum << "; " << pos << endl;
    debug("ascRowsTotalSums_upTo0BasedRowIdx") FOREACH (s, ascRowsTotalSums_upToNRows) cout << s << endl;
    debug("ascRows_takeNRowsAndReminderM")
        FORE (i, 0, n) {
            FOR (j, 0, m) {
                cout << ascRows_takeNRowsAndReminderM[getTabIdx(i,j,m)] << " ";
            }
            cout << endl;
        }
    
    int elemsFromDescRowsCount = Size(negElemsFromDescRows);
    sum = 0;
    ll result = ascRows_takeNRowsAndReminderM[getTabIdx(k / m, k % m, m)];
    FOREACH (negElem, negElemsFromDescRows) {
        --k;
        if (k < 0) {
            break;
        }
        
        sum += -negElem;
        result = max(result, sum + ascRows_takeNRowsAndReminderM[getTabIdx(k / m, k % m, m)]);
    }
    
    printf("%lld\n", result);
}

int main() {
    int test = 1;
    //scanf("%d", &test);

    FORE (i, 1, test) rob(i);

    return 0;
}