#include<bits/stdc++.h>
using namespace std;
long long n, m, x, a, b, pre[501][501], mini = INT_MAX;
int main()
{
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
cin >> n >> m >> a >> b;
if(a > b) swap(a, b);
pre[0][0] = 0;
for(int i = 1; i <= n; ++i)
{
for(int j = 1; j <= m; ++j)
{
cin >> x;
if(i == 1) pre[i][j] = pre[i][j - 1] + x;
else if(j == 1) pre[i][j] = pre[i - 1][j] + x;
else pre[i][j] = pre[i][j - 1] + pre[i - 1][j] - pre[i - 1][j - 1] + x;
}
}
for(int i = 1; i <= n; ++i)
{
for(int j = 1; j <= m; ++j)
{
int jj = 0;
for(int ii = 1; ii <= n; ++ii)
{
long long temp = pre[i][j] - pre[i][jj - 1] - pre[ii - 1][j] + pre[ii - 1][jj - 1];
while(jj < j && temp >= a)
{
++jj;
temp = pre[i][j] - pre[i][jj - 1] - pre[ii - 1][j] + pre[ii - 1][jj - 1];
}
if(jj < k) mini = min(mini, abs(temp - a) + abs(temp - b));
--jj;
temp = pre[i][j] - pre[i][jj - 1] - pre[ii - 1][j] + pre[ii - 1][jj - 1];
if(jj >= 0) mini = min(mini, abs(temp - a) + abs(temp - b));
}
}
}
cout << mini;
}
Compilation message
Main.cpp: In function 'int main()':
Main.cpp:36:13: error: 'k' was not declared in this scope
36 | if(jj < k) mini = min(mini, abs(temp - a) + abs(temp - b));
| ^
