Submission #401984

#	Time	Username	Problem	Language	Result	Execution time	Memory
401984		IloveN	Quality Of Living (IOI10_quality)	C++14	100 / 100	2085 ms	140284 KiB

quality

#include<bits/stdc++.h>
#include "quality.h"

using namespace std;
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define all(vr) vr.begin(),vr.end()
#define vi vector<int>
#define vll vector<ll>
const int N = 3e3 + 10;

int ps[N][N];

int rectangle(int R, int C, int H, int W, int Q[3001][3001]) {
	int l = 1, r = R * C, ans = 0;
	while (l <= r)
    {
        int mid = (l + r) / 2;
        for (int i = 1; i <= R; ++i)
            for (int j = 1; j <= C; ++j)
                ps[i][j] = ps[i - 1][j] + ps[i][j - 1] - ps[i - 1][j - 1] + (Q[i - 1][j - 1] <= mid);
        int mx = 0;
        for (int i = 1; i <= R - H + 1; ++i)
            for (int j = 1; j <= C - W + 1; ++j)
                mx = max(mx, ps[i + H - 1][j + W - 1] - ps[i + H - 1][j - 1] - ps[i - 1][j + W - 1] + ps[i - 1][j - 1]);
        if (mx >= (H * W + 1) / 2) ans = mid, r = mid - 1;
        else l = mid + 1;
    }
    return ans;
}

/*int a[3001][3001];

int main()
{
    freopen("ss.inp", "r", stdin);
    ios::sync_with_stdio(false);
    cin.tie(0);
    int m, n, h, w;
    cin >> m >> n >> h >> w;
    for (int i = 0; i < m; ++i)
        for (int j = 0; j < n; ++j) cin >> a[i][j];
    cout << rectangle(m, n, h, w, a);
    return 0;
}*/

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 20 / 20