Submission #603277

#	Time	Username	Problem	Language	Result	Execution time	Memory
603277		l_reho	Quality Of Living (IOI10_quality)	C++14	100 / 100	2141 ms	140560 KiB

quality

#include <bits/stdc++.h>
#include "quality.h"
#define fi first
#define se second
#define pb push_back
 
using namespace std;
typedef long long ll;
 
const int MAXN = 1e6 + 7;
const int INF = 1e9 + 7;
 
bool check(int m, int R, int C, int H, int W, int Q[][3001])
{
	vector<vector<int>> pref(R + 1, vector<int>(C + 1, 0));
	for (int i = 1; i <= R; ++i) {
		for (int j = 1; j <= C; ++j)
			pref[i][j] = pref[i - 1][j] + pref[i][j - 1] - pref[i - 1][j - 1] + (Q[i - 1][j - 1] <= m);
		printf("\n");
	}
	for (int i = 1; i <= R-H+1; ++i)
		for (int j = 1; j <= C-W+1; ++j)
			if (2*(pref[i + H - 1][j + W - 1] - pref[i - 1][j + W - 1] - pref[i + H - 1][j - 1] + pref[i - 1][j - 1]) >= H*W)
				return true;
	return false;
}
 
int rectangle(int R, int C, int H, int W, int Q[][3001])
{
	int lo = 1, hi = R*C;
	while (lo < hi) {
		int mid = (lo + hi) / 2;
		if (check(mid, R, C, H, W, Q))
			hi = mid;
		else
			lo = mid + 1;
	}
	return lo;
}

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