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Submission #784646

# Submission time Handle Problem Language Result Execution time Memory
784646 2023-07-16T11:27:00 Z ToniB Chessboard (IZhO18_chessboard) C++17
47 / 100
 2000 ms 6860 KB 
#include <bits/stdc++.h>
#define X first
#define Y second
using namespace std;
const int MAXN = 1e5 + 5;
const int OFF = 1 << 18;
typedef long long ll;

int n, k, tour[OFF];
vector<pair<int, int> > v[MAXN];
bool prop[OFF];

void propagate(int& x, int& l, int& r){
	prop[x] = 0;
	tour[x] = r - l + 1 - tour[x];
	if(l != r){
		prop[x * 2 + 1] ^= 1;
		prop[x * 2 + 2] ^= 1;
	}
}

void upd(int x, int l, int r, int ql, int qr){
	if(prop[x]) propagate(x, l, r);
	if(ql <= l && r <= qr){
		prop[x] = 1;
		propagate(x, l, r);
		return ;
	}
	if(ql > r || l > qr) return ;
	int mid = (l + r) >> 1;
	upd(x * 2 + 1, l, mid, ql, qr);
	upd(x * 2 + 2, mid + 1, r, ql, qr);
	tour[x] = tour[x * 2 + 1] + tour[x * 2 + 2];
}

inline ll solve(int& k){
	ll ret = 5e9;
	for(int b = 0; b < 2; ++b){
		memset(tour, 0, sizeof tour);
		memset(prop, 0, sizeof prop);
		ll cur = 0;
		for(int i = b * k; i < n; i += 2 * k){
			upd(0, 0, n - 1, i, i + k - 1);
		}
		for(int i = 0; i < n; ++i){
			for(pair<int, int>& p : v[i]){
				upd(0, 0, n - 1, p.X, p.Y);
			}
			if(i % k == 0) upd(0, 0, n - 1, 0, n - 1);
			cur += tour[0];
		}
		ret = min(ret, cur);
	}
	return ret;
}

int main(){
	ios_base::sync_with_stdio(false); cin.tie(0);

	cin >> n >> k;
	for(int i = 0; i < k; ++i){
		int x1, y1, x2, y2;
		cin >> x1 >> y1 >> x2 >> y2;
		--x1, --y1, --x2, --y2;
		v[x1].push_back({y1, y2});
		v[x2 + 1].push_back({y1, y2});
	}
	ll ans = 5e9;
	for(int i = 1; i < n; ++i){
		if(n % i == 0){
			ans = min(ans, solve(i));
		}
	}
	cout << ans;
	return 0;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3924 KB Output is correct
2 Correct 2 ms 3924 KB Output is correct
3 Correct 2 ms 3924 KB Output is correct
4 Correct 2 ms 3924 KB Output is correct
5 Correct 2 ms 3924 KB Output is correct
6 Correct 2 ms 3924 KB Output is correct
7 Correct 2 ms 3924 KB Output is correct
8 Correct 2 ms 3924 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 116 ms 6104 KB Output is correct
2 Correct 27 ms 4436 KB Output is correct
3 Correct 77 ms 5628 KB Output is correct
4 Correct 53 ms 5264 KB Output is correct
5 Correct 98 ms 5860 KB Output is correct
6 Correct 73 ms 5180 KB Output is correct
7 Correct 17 ms 4304 KB Output is correct
8 Correct 81 ms 5264 KB Output is correct
9 Correct 175 ms 6584 KB Output is correct
10 Correct 84 ms 5588 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 3924 KB Output is correct
2 Correct 2 ms 3948 KB Output is correct
3 Correct 3 ms 3924 KB Output is correct
4 Correct 5 ms 3980 KB Output is correct
5 Correct 3 ms 3924 KB Output is correct
6 Correct 3 ms 3924 KB Output is correct
7 Correct 3 ms 3924 KB Output is correct
8 Correct 3 ms 3924 KB Output is correct
9 Correct 3 ms 3924 KB Output is correct
10 Correct 2 ms 3924 KB Output is correct
11 Correct 3 ms 3924 KB Output is correct
12 Correct 3 ms 3924 KB Output is correct
13 Correct 4 ms 3904 KB Output is correct
14 Correct 5 ms 3924 KB Output is correct
15 Correct 3 ms 3924 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 3924 KB Output is correct
2 Correct 2 ms 3948 KB Output is correct
3 Correct 3 ms 3924 KB Output is correct
4 Correct 5 ms 3980 KB Output is correct
5 Correct 3 ms 3924 KB Output is correct
6 Correct 3 ms 3924 KB Output is correct
7 Correct 3 ms 3924 KB Output is correct
8 Correct 3 ms 3924 KB Output is correct
9 Correct 3 ms 3924 KB Output is correct
10 Correct 2 ms 3924 KB Output is correct
11 Correct 3 ms 3924 KB Output is correct
12 Correct 3 ms 3924 KB Output is correct
13 Correct 4 ms 3904 KB Output is correct
14 Correct 5 ms 3924 KB Output is correct
15 Correct 3 ms 3924 KB Output is correct
16 Correct 58 ms 4564 KB Output is correct
17 Correct 73 ms 6164 KB Output is correct
18 Correct 191 ms 6168 KB Output is correct
19 Correct 1274 ms 6116 KB Output is correct
20 Correct 1430 ms 6104 KB Output is correct
21 Correct 79 ms 6204 KB Output is correct
22 Correct 7 ms 3968 KB Output is correct
23 Correct 173 ms 4948 KB Output is correct
24 Correct 171 ms 6188 KB Output is correct
25 Correct 38 ms 4180 KB Output is correct
26 Correct 115 ms 5280 KB Output is correct
27 Correct 209 ms 5992 KB Output is correct
28 Correct 183 ms 6112 KB Output is correct
29 Correct 31 ms 4904 KB Output is correct
30 Correct 8 ms 3924 KB Output is correct

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 116 ms 6104 KB Output is correct
2 Correct 27 ms 4436 KB Output is correct
3 Correct 77 ms 5628 KB Output is correct
4 Correct 53 ms 5264 KB Output is correct
5 Correct 98 ms 5860 KB Output is correct
6 Correct 73 ms 5180 KB Output is correct
7 Correct 17 ms 4304 KB Output is correct
8 Correct 81 ms 5264 KB Output is correct
9 Correct 175 ms 6584 KB Output is correct
10 Correct 84 ms 5588 KB Output is correct
11 Correct 4 ms 3924 KB Output is correct
12 Correct 2 ms 3948 KB Output is correct
13 Correct 3 ms 3924 KB Output is correct
14 Correct 5 ms 3980 KB Output is correct
15 Correct 3 ms 3924 KB Output is correct
16 Correct 3 ms 3924 KB Output is correct
17 Correct 3 ms 3924 KB Output is correct
18 Correct 3 ms 3924 KB Output is correct
19 Correct 3 ms 3924 KB Output is correct
20 Correct 2 ms 3924 KB Output is correct
21 Correct 3 ms 3924 KB Output is correct
22 Correct 3 ms 3924 KB Output is correct
23 Correct 4 ms 3904 KB Output is correct
24 Correct 5 ms 3924 KB Output is correct
25 Correct 3 ms 3924 KB Output is correct
26 Correct 58 ms 4564 KB Output is correct
27 Correct 73 ms 6164 KB Output is correct
28 Correct 191 ms 6168 KB Output is correct
29 Correct 1274 ms 6116 KB Output is correct
30 Correct 1430 ms 6104 KB Output is correct
31 Correct 79 ms 6204 KB Output is correct
32 Correct 7 ms 3968 KB Output is correct
33 Correct 173 ms 4948 KB Output is correct
34 Correct 171 ms 6188 KB Output is correct
35 Correct 38 ms 4180 KB Output is correct
36 Correct 115 ms 5280 KB Output is correct
37 Correct 209 ms 5992 KB Output is correct
38 Correct 183 ms 6112 KB Output is correct
39 Correct 31 ms 4904 KB Output is correct
40 Correct 8 ms 3924 KB Output is correct
41 Execution timed out 2096 ms 6860 KB Time limit exceeded
42 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3924 KB Output is correct
2 Correct 2 ms 3924 KB Output is correct
3 Correct 2 ms 3924 KB Output is correct
4 Correct 2 ms 3924 KB Output is correct
5 Correct 2 ms 3924 KB Output is correct
6 Correct 2 ms 3924 KB Output is correct
7 Correct 2 ms 3924 KB Output is correct
8 Correct 2 ms 3924 KB Output is correct
9 Correct 116 ms 6104 KB Output is correct
10 Correct 27 ms 4436 KB Output is correct
11 Correct 77 ms 5628 KB Output is correct
12 Correct 53 ms 5264 KB Output is correct
13 Correct 98 ms 5860 KB Output is correct
14 Correct 73 ms 5180 KB Output is correct
15 Correct 17 ms 4304 KB Output is correct
16 Correct 81 ms 5264 KB Output is correct
17 Correct 175 ms 6584 KB Output is correct
18 Correct 84 ms 5588 KB Output is correct
19 Correct 4 ms 3924 KB Output is correct
20 Correct 2 ms 3948 KB Output is correct
21 Correct 3 ms 3924 KB Output is correct
22 Correct 5 ms 3980 KB Output is correct
23 Correct 3 ms 3924 KB Output is correct
24 Correct 3 ms 3924 KB Output is correct
25 Correct 3 ms 3924 KB Output is correct
26 Correct 3 ms 3924 KB Output is correct
27 Correct 3 ms 3924 KB Output is correct
28 Correct 2 ms 3924 KB Output is correct
29 Correct 3 ms 3924 KB Output is correct
30 Correct 3 ms 3924 KB Output is correct
31 Correct 4 ms 3904 KB Output is correct
32 Correct 5 ms 3924 KB Output is correct
33 Correct 3 ms 3924 KB Output is correct
34 Correct 58 ms 4564 KB Output is correct
35 Correct 73 ms 6164 KB Output is correct
36 Correct 191 ms 6168 KB Output is correct
37 Correct 1274 ms 6116 KB Output is correct
38 Correct 1430 ms 6104 KB Output is correct
39 Correct 79 ms 6204 KB Output is correct
40 Correct 7 ms 3968 KB Output is correct
41 Correct 173 ms 4948 KB Output is correct
42 Correct 171 ms 6188 KB Output is correct
43 Correct 38 ms 4180 KB Output is correct
44 Correct 115 ms 5280 KB Output is correct
45 Correct 209 ms 5992 KB Output is correct
46 Correct 183 ms 6112 KB Output is correct
47 Correct 31 ms 4904 KB Output is correct
48 Correct 8 ms 3924 KB Output is correct
49 Execution timed out 2096 ms 6860 KB Time limit exceeded
50 Halted 0 ms 0 KB -