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#include <cstdio>
#include <cstring>

int main(void)
{
	unsigned n, m, k;
	scanf("%u%u%u", &n, &m, &k);
	static unsigned long long sumy[300000];
	unsigned long long *ps = sumy;
	for (unsigned i = 0; i < n; i++) {
		unsigned long long suma = 0ULL;
		for (unsigned j = 0; j < m; j++) {
			unsigned long long a;
			scanf("%llu", &a);
			suma += a;
			*ps++ = suma;
		}
	}
	static unsigned long long sofar[300001];
	for (unsigned i = 0; i < n; i++) {
		for (unsigned j = k; ;) {
			for (unsigned h = 0; h < m; h++)
				if (j >= h + 1) {
					unsigned long long val = sofar[j - h - 1] + sumy[i * m + h];
					if (sofar[j] < val)
						sofar[j] = val;
				}
			if (!--j)
				break;
		}
	}
	printf("%llu\n", sofar[k]);
	return 0;
}