제출 #926206

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
926206		AlphaMale06	Chessboard (IZhO18_chessboard)	C++17	70 / 100	158 ms	5736 KiB

chessboard

#include <bits/stdc++.h>

using namespace std;

#define F first
#define S second
#define int long long

struct rect{
    int x1, y1, x2, y2;
};

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, k;
    cin >> n >> k;
    rect a[k];
    for(int i=0; i< k; i++){
        cin >> a[i].x1 >> a[i].y1 >> a[i].x2 >> a[i].y2;
        a[i].x1--;
        a[i].x2--;
        a[i].y1--;
        a[i].y2--;
    }
    int ans=1e12;
    for(int d=1; d<n; d++){
        if(n%d!=0)continue;
        int flip=d*d*(((n*n)/(d*d)+1)/2);
        for(int i=0; i< k; i++){
            if(((a[i].x1/d)&1)==((a[i].y1/d)&1)){
                flip--;
            }
            else{
                flip++;
            }
        }
        ans=min({ans, flip, n*n-flip});
    }
    cout << ans << '\n';
}

• Subtask 1: 8 / 8
• Subtask 2: 8 / 8
• Subtask 3: 15 / 15
• Subtask 4: 16 / 16
• Subtask 5: 23 / 23
• Subtask 6: 0 / 30