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Submission #93063

# Submission time Handle Problem Language Result Execution time Memory
93063 2019-01-06T11:01:53 Z Makhsud Chessboard (IZhO18_chessboard) C++17
47 / 100
 139 ms 2296 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[100005][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/e )+1)/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

# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 380 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 256 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 71 ms 256 KB Output is correct
2 Correct 19 ms 256 KB Output is correct
3 Correct 79 ms 252 KB Output is correct
4 Correct 44 ms 256 KB Output is correct
5 Correct 63 ms 504 KB Output is correct
6 Correct 41 ms 256 KB Output is correct
7 Correct 10 ms 376 KB Output is correct
8 Correct 40 ms 376 KB Output is correct
9 Correct 100 ms 376 KB Output is correct
10 Correct 57 ms 376 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 252 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 256 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 376 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 252 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 256 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 26 ms 380 KB Output is correct
17 Correct 70 ms 376 KB Output is correct
18 Correct 89 ms 376 KB Output is correct
19 Correct 125 ms 376 KB Output is correct
20 Correct 139 ms 376 KB Output is correct
21 Correct 67 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 45 ms 420 KB Output is correct
24 Correct 80 ms 504 KB Output is correct
25 Correct 10 ms 376 KB Output is correct
26 Correct 51 ms 376 KB Output is correct
27 Correct 66 ms 376 KB Output is correct
28 Correct 86 ms 376 KB Output is correct
29 Correct 29 ms 376 KB Output is correct
30 Correct 4 ms 376 KB Output is correct

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 71 ms 256 KB Output is correct
2 Correct 19 ms 256 KB Output is correct
3 Correct 79 ms 252 KB Output is correct
4 Correct 44 ms 256 KB Output is correct
5 Correct 63 ms 504 KB Output is correct
6 Correct 41 ms 256 KB Output is correct
7 Correct 10 ms 376 KB Output is correct
8 Correct 40 ms 376 KB Output is correct
9 Correct 100 ms 376 KB Output is correct
10 Correct 57 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 256 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 252 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 256 KB Output is correct
21 Correct 2 ms 256 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 256 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 26 ms 380 KB Output is correct
27 Correct 70 ms 376 KB Output is correct
28 Correct 89 ms 376 KB Output is correct
29 Correct 125 ms 376 KB Output is correct
30 Correct 139 ms 376 KB Output is correct
31 Correct 67 ms 376 KB Output is correct
32 Correct 2 ms 376 KB Output is correct
33 Correct 45 ms 420 KB Output is correct
34 Correct 80 ms 504 KB Output is correct
35 Correct 10 ms 376 KB Output is correct
36 Correct 51 ms 376 KB Output is correct
37 Correct 66 ms 376 KB Output is correct
38 Correct 86 ms 376 KB Output is correct
39 Correct 29 ms 376 KB Output is correct
40 Correct 4 ms 376 KB Output is correct
41 Incorrect 139 ms 2296 KB Output isn't correct
42 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 380 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 256 KB Output is correct
9 Correct 71 ms 256 KB Output is correct
10 Correct 19 ms 256 KB Output is correct
11 Correct 79 ms 252 KB Output is correct
12 Correct 44 ms 256 KB Output is correct
13 Correct 63 ms 504 KB Output is correct
14 Correct 41 ms 256 KB Output is correct
15 Correct 10 ms 376 KB Output is correct
16 Correct 40 ms 376 KB Output is correct
17 Correct 100 ms 376 KB Output is correct
18 Correct 57 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 256 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 252 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 256 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 256 KB Output is correct
29 Correct 2 ms 256 KB Output is correct
30 Correct 2 ms 376 KB Output is correct
31 Correct 2 ms 376 KB Output is correct
32 Correct 2 ms 256 KB Output is correct
33 Correct 2 ms 376 KB Output is correct
34 Correct 26 ms 380 KB Output is correct
35 Correct 70 ms 376 KB Output is correct
36 Correct 89 ms 376 KB Output is correct
37 Correct 125 ms 376 KB Output is correct
38 Correct 139 ms 376 KB Output is correct
39 Correct 67 ms 376 KB Output is correct
40 Correct 2 ms 376 KB Output is correct
41 Correct 45 ms 420 KB Output is correct
42 Correct 80 ms 504 KB Output is correct
43 Correct 10 ms 376 KB Output is correct
44 Correct 51 ms 376 KB Output is correct
45 Correct 66 ms 376 KB Output is correct
46 Correct 86 ms 376 KB Output is correct
47 Correct 29 ms 376 KB Output is correct
48 Correct 4 ms 376 KB Output is correct
49 Incorrect 139 ms 2296 KB Output isn't correct
50 Halted 0 ms 0 KB -