#define _CRT_SECURE_NO_DEPRECATE
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <algorithm>
#define MAXN 7300

int N, M, R, C, A[MAXN][MAXN];
int RSum[MAXN], LSum[MAXN], maxx, Tsum, minn = 0x3f3f3f3f;
int in[MAXN];

inline bool cmp(int x, int y) { return x < y; }

inline bool check(int i, int lim){
	int x = i, j = 0;
	for (; x; x -= x & -x, ++j);
	return j <= lim;
}

int main(){
	assert(freopen("elimin.in", "r", stdin));
	freopen("elimin.out", "w", stdout);

	scanf("%d %d %d %d", &M, &N, &R, &C);
	//assert((M < N ? M : N) < 32);

	if (M <= N){
		for (int i = 0; i < M; ++i)
			for (int j = 0; j < N; ++j)
				scanf("%d ", &A[i][j]),
				LSum[i] += A[i][j],
				RSum[j] += A[i][j];
		R ^= C ^= R ^= C;
	}
	else {
		for (int i = 0; i < M; ++i)
			for (int j = 0; j < N; ++j)
				scanf("%d ", &A[j][i]),
				LSum[j] += A[j][i],
				RSum[i] += A[j][i];
	}

	printf("%d", Tsum - minn);
	return 0;
}