#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
int n, m, a, b; cin >> n >> m >> a >> b;
vector<vector<int>> x(n, vector<int>(m));
for(int i = 0; i < n; i++){
for(int y = 0; y < m; y++){
cin >> x[i][y];
}
}
vector<vector<int>> pref(n, vector<int>(m+1));
for(int i = 0; i < n; i++){
int s = 0;
for(int y = 0; y < m; y++){
s += x[i][y];
pref[i][y+1] = s;
}
}
int mn = 1e18;
for(int i = 1; i <= m; i++){
for(int y = i; y <= m; y++){
//i until y
int sum = 0;
int it = 0;
for(int z = 0; z < n; z++){
sum += pref[z][y] - pref[z][i-1];
while(sum > b){
mn = min(mn, abs(sum - a) + abs(sum - b));
sum -= pref[it][y] - pref[it][i-1];
it++;
}
mn = min(mn, abs(sum - a) + abs(sum - b));
}
}
}
cout << mn << "\n";
return 0;
}
