Submission #659320

#	Time	Username	Problem	Language	Result	Execution time	Memory
659320		stevancv	Quality Of Living (IOI10_quality)	C++14	100 / 100	2271 ms	175956 KiB

quality

#include <bits/stdc++.h>
#include "quality.h"
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 3e3 + 2;
const int inf = 2e9;
int rectangle(int n, int m, int h, int w, int q[3001][3001]) {
    vector<vector<int>> a(n + 1, vector<int>(m + 1));
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            a[i][j] = q[i - 1][j - 1];
        }
    }
    auto Can = [&] (int x) {
        vector<vector<int>> p(n + 1, vector<int>(m + 1, 0));
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= m; j++) {
                if (a[i][j] > x) p[i][j] = -1;
                else if (a[i][j] < x) p[i][j] = 1;
                p[i][j] += p[i - 1][j] + p[i][j - 1] - p[i - 1][j - 1];
            }
        }
        for (int i = h; i <= n; i++) {
            for (int j = w; j <= m; j++) {
                if (p[i][j] - p[i - h][j] - p[i][j - w] + p[i - h][j - w] >= 0) return true;
            }
        }
        return false;
    };
    int l = 1, r = n * m, ans = n * m;
    while (l <= r) {
        int mid = l + r >> 1;
        if (Can(mid)) {
            r = mid - 1;
            ans = mid;
        }
        else l = mid + 1;
    }
    return ans;
}

Compilation message (stderr)

quality.cpp: In function 'int rectangle(int, int, int, int, int (*)[3001])':
quality.cpp:37:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   37 |         int mid = l + r >> 1;
      |                   ~~^~~

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