Submission #1036081

#	Time	Username	Problem	Language	Result	Execution time	Memory
1036081		vjudge1	Zemljište (COCI22_zemljiste)	C++17	0 / 70	1 ms	348 KiB

Main

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

const ll N = 505;
ll n, m, a, b, mat[N][N];

ll f(ll i, ll j, ll x, ll y){
    return mat[x][y] - mat[x][j - 1] - mat[i - 1][y] + mat[i - 1][j - 1];
}

int main(){
    cin >> n >> m >> a >> b;
    for (ll i = 1; i <= n; i ++){
        for (ll j = 1; j <= m; j ++){
            cin >> mat[i][j];

            mat[i][j] += mat[i - 1][j];
            mat[i][j] += mat[i][j - 1];
            mat[i][j] -= mat[i - 1][j - 1];
        }
    }

    if (b < a) swap(a, b);

    ll ans = 1e18;
    for (ll i = 1; i <= n; i ++){
        for (ll j = 1; j <= m; j ++){
            for (ll x = i; x <= n; x ++){
                if (f(i, j, x, j) > b) break;
                
                ll l = j;
                ll r = m + 1;
                while (r - l > 1){
                    ll mid = (l + r) / 2;
                    if (f(i, j, x, mid) > b)
                        r = mid;
                    else
                        l = mid;
                }

                ll sm = f(i, j, x, l);
                ans = min(ans, abs(a - sm) + abs(b - sm));

                if (l < m) sm = f(i, j, x, l + 1);
                ans = min(ans, abs(a - sm) + abs(b - sm));
            }
        }
    }

    cout << ans << endl;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 40