oj.uz

답안 #93085

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
93085 2019-01-06T12:07:04 Z Makhsud Chessboard (IZhO18_chessboard) C++17
16 / 100
 104 ms 804 KB 
#include <bits/stdc++.h>
#define ll long long
using namespace std;

ll n, k, x, y, xx, yy;
ll mn = INT_MAX;

ll ch ( ll del ) {
	ll ans = 0;
	if ( del == 1 ) {
		return (n*n)/2;
	}
	for ( int i = 1; i <= (n/del); i ++ ) {
		if ( i % 2 == 1 ) {
			ans += (del*del) * ( (n/del) / 2 );
		}
		else {
			ans += (del*del) * ( ( ( n/del )+1) / 2 );
		}
	}
	return ans;
}
ll a[5][5];
void subt2()
{
	for ( int i = 1; i <= k; i ++ ) {
		cin >> x >> y >> xx >> yy;
		a[x%2][y%2]++;
	}
	ll a1 = 0, a2 = 0;
	a1 = (n*n) / 2;
	a2 = a1 + 1;

	a2 = a2 - (a[1][1] + a[0][0]);
	a2 = a2 + (a[1][0] + a[0][1]);

	a1 = a1 - (a[1][0] + a[0][1]);
	a1 = a1 + (a[1][1] + a[0][0]);

	cout << min ( (a1), (a2) );
}
ll d[50000][5][5];
vector<ll>divs;
void subt3()
{
	for ( int i = 1; i < n; i ++ ){
		if ( n % i == 0 ){
			divs.push_back((ll)i);
		}
	}
	for ( int i = 1; i <= k; i ++ ) {
		cin >> x >> y >> xx >> yy;
		for ( auto e: divs ) {
			ll c, r;
			r = ( x / e ) + ((x % e) && 1 );
			c = ( y / e ) + ((y % e) && 1 );
			d[e][r%2][c%2] ++;
		}
	}
	ll cnt1 = 0, cnt2 = 0, mn = INT_MAX;
	for ( auto e: divs ){
		cnt1 = cnt2 = 0;
		for ( int i = 1; i <= n/e; i ++ ) {
			if ( i % 2 == 1 ) {
				cnt1 += ( (e*e) * ((n/e )/2) );
				cnt2 += ( (e*e) * (((n/e )+1)/2) );
			} else {
				cnt2 += ( (e*e) * ((n/e )/2) );
				cnt1 += ( (e*e) * (((n+1)/e )/2) );
			}
		}
		cnt1 += (d[e][1][1] + d[e][0][0]);
		cnt1 -= (d[e][1][0] + d[e][0][1]);

		cnt2 += (d[e][1][0] + d[e][0][1]);
		cnt2 -= (d[e][1][1] + d[e][0][0]);
		mn = min( mn, min( cnt1, cnt2 ) );
	}
	cout << mn;
}

int main()
{
	cin >> n >> k;
	ll cnt = 0;
	for ( int i = 1; i <= n; i ++ )
		if ( n % i == 0 ) cnt ++;

	if ( cnt == 2 ){
		subt2();
		return 0;
	}

	if ( k != 0 ) {
		subt3();
		return 0;
	}

	for ( int i = 1; i < n; i ++ ) {
		if ( n % i == 0 ) {
			ll an = ch(i);
			mn = min ( mn, an );
		}
	}
	cout << mn;
}

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 252 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 2 ms 252 KB Output is correct
8 Correct 2 ms 380 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 72 ms 504 KB Output is correct
2 Correct 19 ms 504 KB Output is correct
3 Correct 47 ms 504 KB Output is correct
4 Correct 43 ms 504 KB Output is correct
5 Correct 63 ms 536 KB Output is correct
6 Correct 41 ms 504 KB Output is correct
7 Correct 10 ms 504 KB Output is correct
8 Correct 42 ms 504 KB Output is correct
9 Correct 104 ms 804 KB Output is correct
10 Correct 56 ms 504 KB Output is correct

Subtask #3
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 72 ms 504 KB Output is correct
2 Correct 19 ms 504 KB Output is correct
3 Correct 47 ms 504 KB Output is correct
4 Correct 43 ms 504 KB Output is correct
5 Correct 63 ms 536 KB Output is correct
6 Correct 41 ms 504 KB Output is correct
7 Correct 10 ms 504 KB Output is correct
8 Correct 42 ms 504 KB Output is correct
9 Correct 104 ms 804 KB Output is correct
10 Correct 56 ms 504 KB Output is correct
11 Incorrect 2 ms 376 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 252 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 2 ms 252 KB Output is correct
8 Correct 2 ms 380 KB Output is correct
9 Correct 72 ms 504 KB Output is correct
10 Correct 19 ms 504 KB Output is correct
11 Correct 47 ms 504 KB Output is correct
12 Correct 43 ms 504 KB Output is correct
13 Correct 63 ms 536 KB Output is correct
14 Correct 41 ms 504 KB Output is correct
15 Correct 10 ms 504 KB Output is correct
16 Correct 42 ms 504 KB Output is correct
17 Correct 104 ms 804 KB Output is correct
18 Correct 56 ms 504 KB Output is correct
19 Incorrect 2 ms 376 KB Output isn't correct
20 Halted 0 ms 0 KB -