Submission #936031

#	Time	Username	Problem	Language	Result	Execution time	Memory
936031		Regulus	Zemljište (COCI22_zemljiste)	C++17	70 / 70	386 ms	6996 KiB

Main

#include <bits/stdc++.h>
#define IO ios::sync_with_stdio(false);cin.tie(0);
#define debug(x) cerr << #x << " = " << (x) << ' '
#define bug(x) cerr << (x) << ' '
#define endl cerr << '\n'
#define all(v) (v).begin(), (v).end()
#define SZ(v) (ll)(v).size()
#define lowbit(x) (x)&-(x)
#define pb emplace_back
#define F first
#define S second
using namespace std;
using ll = long long;
using pll = pair<ll, ll>;
//#define TEST
const int N = 505;
const ll LLINF = 2e18;
ll a[N][N], sum[N], col[N][N];
 
int main(void)
{ IO
    ll n, i, m, L, R, ans = LLINF;
 
    cin >> n >> m >> L >> R;
    if (L > R) swap(L, R);
    for (i=1; i <= n; ++i)
        for (int j=1; j <= m; ++j)
            cin >> a[i][j], col[i][j] = col[i-1][j] + a[i][j];
 
    for (int lb=0; lb < n; ++lb)
    {
        for (int ub=lb+1; ub <= n; ++ub)
        {
            ll it = 0, it2 = 0;
            for (i=1; i <= m; ++i)
            {
                sum[i] = sum[i-1] + col[ub][i]-col[lb][i];

                while (it <= i && sum[i]-sum[it] >= L) ++it;
                while (it2 <= i && sum[i]-sum[it2] > R) ++it2;

                if (it != it2)
                {
                    ans = R - L;
                } else {
                    ll x = sum[i] - sum[it];
                    ans = min(ans, abs(L-x) + abs(R-x));
                    if (it != 0)
                    {
                        x = sum[i] - sum[it-1];
                        ans = min(ans, abs(L-x) + abs(R-x));
                    }
                }
            }
        }
    }
    
    cout << ans << '\n';
 
    return 0;
}

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