Submission #875278

#	Time	Username	Problem	Language	Result	Execution time	Memory
875278		Cyber_Wolf	Zemljište (COCI22_zemljiste)	C++17	70 / 70	457 ms	4948 KiB

Main

#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")

using namespace std;

#define lg long long
#define fastio ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);

const lg N = 505;

lg v[N][N];

lg get_sum(lg a, lg b, lg c, lg d)
{
	if(c > d)	swap(c, d);
	if(a > b)	swap(a, b);
	return v[b][d]-v[a-1][d]-v[b][c-1]+v[a-1][c-1];
}

int main()
{
	fastio;
	lg n, m, a, b;
	cin >> n >> m >> a >> b;
	if(b < a)	swap(a, b);
	for(int i = 1; i <= n; i++)
	{
		for(int j = 1; j <= m; j++)
		{
			cin >> v[i][j];
			v[i][j] += v[i-1][j]+v[i][j-1]-v[i-1][j-1];

		}
	}
	lg ans = 2e18;
	for(int i = 1; i <= n; i++)
	{
		for(int j = 1; j <= i; j++)
		{
			lg ptr1 = m, ptr2 = 1;
			for(int k = 1; k <= m; k++)
			{
				while(ptr2 < k && get_sum(j, i, k, ptr2+1) >= a)	ptr2++;
				lg y = get_sum(j, i, k, ptr2);
				ans = min(ans, abs(y-a)+abs(y-b));
			}
			for(int k = m; k; k--)
			{
				while(ptr1 > k && get_sum(j, i, k, ptr1) > b)	ptr1--;
				lg y = get_sum(j, i, k, ptr1);
				ans = min(ans, abs(y-a)+abs(y-b));
			}
		}
	}
	cout << ans << '\n';

    return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 40 / 40