제출 #74492

#제출 시각아이디문제언어결과실행 시간메모리
74492SpeedOfMagic보물 찾기 (CEOI13_treasure2)C++17
44 / 100
3 ms812 KiB
#include "treasure.h"
#include <bits/stdc++.h>
using namespace std;
#define rep(a, l, r) for(int a = (l); a < (r); a++)
/*
20
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*/

int n;

int cost(int r1, int c1, int r2, int c2) { return n * n - (r2 - r1 + 1) * (c2 - c1 + 1) + 1; }

int ask(int r1, int c1, int r2, int c2) {
	int cost1 = cost(r1, c1, r2, c2),
		cost2 = cost(1, 1, n, n) + cost(r2 + 1, 1, n, n) + cost(1, c2 + 1, n, n) + cost(r2 + 1, c2 + 1, n, n);
	if (cost1 < cost2) 
		return countTreasure(r1, c1, r2, c2);
	else
		return countTreasure(1, 1, n, n) - countTreasure(1, c2 + 1, n, n) - countTreasure(r2 + 1, 1, n, n) + countTreasure(r2 + 1, c2 + 1, n, n);
}

void findTreasure (int N) {
	n = N;
	int pref[n + 1][n + 1];
    rep(i, 0, n + 1)
        rep(j, 0, n + 1)
            pref[i][j] = 0;

	int ans[n][n];	
	
    rep(i, 1, n + 1)
        rep(j, 1, n + 1) {
			pref[i][j] = ask(1, 1, i, j);
			ans[i][j] = pref[i][j] - pref[i - 1][j] - pref[i][j - 1] + pref[i - 1][j - 1];
        }
	
	rep(i, 1, n + 1)
		rep(j, 1, n + 1)
			if (ans[i][j])
				Report(i, j);
}
#Verdict Execution timeMemoryGrader output
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