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Submission #93061

# Submission time Handle Problem Language Result Execution time Memory
93061 2019-01-06T11:00:09 Z Makhsud Chessboard (IZhO18_chessboard) C++17
47 / 100
 146 ms 1912 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[500][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 376 KB Output is correct
2 Correct 2 ms 380 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 256 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 2 ms 376 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 72 ms 888 KB Output is correct
2 Correct 20 ms 604 KB Output is correct
3 Correct 48 ms 852 KB Output is correct
4 Correct 44 ms 848 KB Output is correct
5 Correct 64 ms 832 KB Output is correct
6 Correct 42 ms 888 KB Output is correct
7 Correct 10 ms 376 KB Output is correct
8 Correct 42 ms 888 KB Output is correct
9 Correct 101 ms 888 KB Output is correct
10 Correct 59 ms 760 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 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 252 KB Output is correct
5 Correct 3 ms 376 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 380 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 3 ms 380 KB Output is correct
15 Correct 2 ms 256 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 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 252 KB Output is correct
5 Correct 3 ms 376 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 380 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 3 ms 380 KB Output is correct
15 Correct 2 ms 256 KB Output is correct
16 Correct 26 ms 760 KB Output is correct
17 Correct 71 ms 1656 KB Output is correct
18 Correct 90 ms 1864 KB Output is correct
19 Correct 129 ms 1808 KB Output is correct
20 Correct 146 ms 1912 KB Output is correct
21 Correct 69 ms 1560 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 45 ms 1144 KB Output is correct
24 Correct 81 ms 1736 KB Output is correct
25 Correct 10 ms 504 KB Output is correct
26 Correct 51 ms 1144 KB Output is correct
27 Correct 65 ms 1400 KB Output is correct
28 Correct 85 ms 1912 KB Output is correct
29 Correct 44 ms 888 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 72 ms 888 KB Output is correct
2 Correct 20 ms 604 KB Output is correct
3 Correct 48 ms 852 KB Output is correct
4 Correct 44 ms 848 KB Output is correct
5 Correct 64 ms 832 KB Output is correct
6 Correct 42 ms 888 KB Output is correct
7 Correct 10 ms 376 KB Output is correct
8 Correct 42 ms 888 KB Output is correct
9 Correct 101 ms 888 KB Output is correct
10 Correct 59 ms 760 KB Output is correct
11 Correct 2 ms 376 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 252 KB Output is correct
15 Correct 3 ms 376 KB Output is correct
16 Correct 2 ms 256 KB Output is correct
17 Correct 2 ms 256 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 380 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 3 ms 380 KB Output is correct
25 Correct 2 ms 256 KB Output is correct
26 Correct 26 ms 760 KB Output is correct
27 Correct 71 ms 1656 KB Output is correct
28 Correct 90 ms 1864 KB Output is correct
29 Correct 129 ms 1808 KB Output is correct
30 Correct 146 ms 1912 KB Output is correct
31 Correct 69 ms 1560 KB Output is correct
32 Correct 2 ms 376 KB Output is correct
33 Correct 45 ms 1144 KB Output is correct
34 Correct 81 ms 1736 KB Output is correct
35 Correct 10 ms 504 KB Output is correct
36 Correct 51 ms 1144 KB Output is correct
37 Correct 65 ms 1400 KB Output is correct
38 Correct 85 ms 1912 KB Output is correct
39 Correct 44 ms 888 KB Output is correct
40 Correct 4 ms 376 KB Output is correct
41 Runtime error 4 ms 508 KB Execution killed with signal 11 (could be triggered by violating memory limits)
42 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 380 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 256 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 256 KB Output is correct
9 Correct 72 ms 888 KB Output is correct
10 Correct 20 ms 604 KB Output is correct
11 Correct 48 ms 852 KB Output is correct
12 Correct 44 ms 848 KB Output is correct
13 Correct 64 ms 832 KB Output is correct
14 Correct 42 ms 888 KB Output is correct
15 Correct 10 ms 376 KB Output is correct
16 Correct 42 ms 888 KB Output is correct
17 Correct 101 ms 888 KB Output is correct
18 Correct 59 ms 760 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 252 KB Output is correct
23 Correct 3 ms 376 KB Output is correct
24 Correct 2 ms 256 KB Output is correct
25 Correct 2 ms 256 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 380 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 3 ms 380 KB Output is correct
33 Correct 2 ms 256 KB Output is correct
34 Correct 26 ms 760 KB Output is correct
35 Correct 71 ms 1656 KB Output is correct
36 Correct 90 ms 1864 KB Output is correct
37 Correct 129 ms 1808 KB Output is correct
38 Correct 146 ms 1912 KB Output is correct
39 Correct 69 ms 1560 KB Output is correct
40 Correct 2 ms 376 KB Output is correct
41 Correct 45 ms 1144 KB Output is correct
42 Correct 81 ms 1736 KB Output is correct
43 Correct 10 ms 504 KB Output is correct
44 Correct 51 ms 1144 KB Output is correct
45 Correct 65 ms 1400 KB Output is correct
46 Correct 85 ms 1912 KB Output is correct
47 Correct 44 ms 888 KB Output is correct
48 Correct 4 ms 376 KB Output is correct
49 Runtime error 4 ms 508 KB Execution killed with signal 11 (could be triggered by violating memory limits)
50 Halted 0 ms 0 KB -