#include<bits/stdc++.h>
using namespace std;
#define int long long
#pragma GCC optimize("O3,unroll-loops")
signed main(){
int n,m,a,b;
cin>>n>>m>>a>>b;
if(a>b)swap(a,b);
int grid[n+1][m+1];
int pref[n+1][m+1];
for(int q=1;q<=n;q++){
pref[q][0]=0;
for(int w=1;w<=m;w++){
cin>>grid[q][w];
pref[q][w]=pref[q][w-1]+grid[q][w];
}
}
int ans=1e18;
for(int q=1;q<=m;q++){
for(int w=q;w<=m;w++){
int sum=0;
deque<int>cek;
for(int idx=1;idx<=n;idx++){
int brp=pref[idx][w]-pref[idx][q-1];
sum+=brp;
cek.push_back(brp);
ans=min(ans,abs(sum-a)+abs(sum-b));
while(sum>b){
sum-=cek[0];
cek.pop_front();
if(sum==0)break;
ans=min(ans,abs(sum-a)+abs(sum-b));
}
if(sum==0)continue;
ans=min(ans,abs(sum-a)+abs(sum-b));
}
}
}
cout<<ans<<endl;
}
