Submission #735306

#	Time	Username	Problem	Language	Result	Execution time	Memory
735306		That_Salamander	Quality Of Living (IOI10_quality)	C++17	100 / 100	1283 ms	89324 KiB

quality

#include <iostream>
#include <algorithm>
#include <string>
#include <vector>
#include <cmath>
#include <map>
#include <set>

#define FOR(var,bound) for(int var = 0; var < bound; var++)
#define FORB(var,lb,ub) for (int var = lb; var < ub; var++)
#define FORR(var,bound) for(int var = bound-1; var >= 0; var--)

using namespace std;

typedef long long ll;
typedef vector<int> vi;
typedef vector<vector<int>> vvi;
typedef pair<int, int> pii;

int p[3001][3001];

int rectangle(int R, int C, int H, int W, int Q[3001][3001]) {
    int l = 1;
    int r = R * C + 1;
    int target = (H * W + 1) / 2;

    while (l != r - 1) {
        int mid = (l + r) / 2;

        for (int i = 0; i < R; i++) {
            for (int j = 0; j < C; j++) {
                p[i+1][j+1] = (Q[i][j] <= mid) + p[i][j+1] + p[i+1][j] - p[i][j];
            }
        }

        bool valid = false;

        for (int i = 0; i + H <= R && !valid; i++) {
            for (int j = 0; j + W <= C; j++) {
                if (p[i+H][j+W] - p[i+H][j] - p[i][j+W] + p[i][j] >= target) {
                    valid = true;
                    break;
                }
            }
        }

        if (valid) {
            r = mid;
        } else {
            l = mid;
        }
    }

    return r;
}

#ifdef LOCAL_TEST
int grid[3001][3001];

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    
    int r, c, h, w;
    cin >> r >> c >> h >> w;


    FOR(i, r) {
        FOR(j, c) {
            cin >> grid[i][j];
        }
    }

    cout << rectangle(r, c, h, w, grid) << endl;
}
#endif

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