#include <bits/stdc++.h>
using namespace std;
#define int long long
int arr[505][505];
int main(){
ios_base::sync_with_stdio(0);cin.tie(0);
int r, s, a, b; cin >> r >> s >> a >> b;
if(a > b) swap(a, b);
for(int i = 1; i <= r; i++) for(int j = 1;j <= s; j++) cin >> arr[i][j];
for(int j = 1; j <= s; j++) for(int i = 1; i <= r;i++) arr[i][j] += arr[i - 1][j];
int ans = INT_MAX;
for(int i = 1; i <= r; i++){
for(int j = i; j <= r; j++){
int pos = 0, sum = 0;
for(int k = 1; k <= s; k++){
sum += arr[j][k] - arr[i - 1][k];
while(sum > b && pos <= k){
ans = min(abs(a - sum) + abs(b - sum), ans);
sum -= arr[j][pos] - arr[i - 1][pos];
pos++;
}
if(a <= sum && b >= sum){
cout << b - a << '\n'; return 0;
}
ans = min(abs(a - sum) + abs(b - sum), ans);
}
}
}
cout << ans << '\n';
}
Compilation message
cc1plus: error: '::main' must return 'int'
