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Submission #784634

# Submission time Handle Problem Language Result Execution time Memory
784634 2023-07-16T11:19:18 Z ToniB Chessboard (IZhO18_chessboard) C++17
47 / 100
 2000 ms 7244 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];
}

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});
	}
	long long 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 3908 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 3948 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 98 ms 6044 KB Output is correct
2 Correct 27 ms 4436 KB Output is correct
3 Correct 70 ms 5588 KB Output is correct
4 Correct 46 ms 5252 KB Output is correct
5 Correct 93 ms 5892 KB Output is correct
6 Correct 56 ms 5204 KB Output is correct
7 Correct 14 ms 4304 KB Output is correct
8 Correct 56 ms 5204 KB Output is correct
9 Correct 125 ms 6508 KB Output is correct
10 Correct 73 ms 5588 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3924 KB Output is correct
2 Correct 2 ms 3924 KB Output is correct
3 Correct 4 ms 3924 KB Output is correct
4 Correct 4 ms 3924 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 2 ms 3924 KB Output is correct
10 Correct 2 ms 3924 KB Output is correct
11 Correct 2 ms 3864 KB Output is correct
12 Correct 2 ms 3924 KB Output is correct
13 Correct 4 ms 3924 KB Output is correct
14 Correct 4 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 3 ms 3924 KB Output is correct
2 Correct 2 ms 3924 KB Output is correct
3 Correct 4 ms 3924 KB Output is correct
4 Correct 4 ms 3924 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 2 ms 3924 KB Output is correct
10 Correct 2 ms 3924 KB Output is correct
11 Correct 2 ms 3864 KB Output is correct
12 Correct 2 ms 3924 KB Output is correct
13 Correct 4 ms 3924 KB Output is correct
14 Correct 4 ms 3924 KB Output is correct
15 Correct 3 ms 3924 KB Output is correct
16 Correct 49 ms 4620 KB Output is correct
17 Correct 65 ms 6172 KB Output is correct
18 Correct 164 ms 6248 KB Output is correct
19 Correct 1078 ms 6124 KB Output is correct
20 Correct 1228 ms 6100 KB Output is correct
21 Correct 63 ms 6196 KB Output is correct
22 Correct 7 ms 3924 KB Output is correct
23 Correct 157 ms 5052 KB Output is correct
24 Correct 148 ms 6100 KB Output is correct
25 Correct 33 ms 4180 KB Output is correct
26 Correct 95 ms 5280 KB Output is correct
27 Correct 177 ms 5988 KB Output is correct
28 Correct 179 ms 6108 KB Output is correct
29 Correct 28 ms 4820 KB Output is correct
30 Correct 7 ms 4052 KB Output is correct

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 98 ms 6044 KB Output is correct
2 Correct 27 ms 4436 KB Output is correct
3 Correct 70 ms 5588 KB Output is correct
4 Correct 46 ms 5252 KB Output is correct
5 Correct 93 ms 5892 KB Output is correct
6 Correct 56 ms 5204 KB Output is correct
7 Correct 14 ms 4304 KB Output is correct
8 Correct 56 ms 5204 KB Output is correct
9 Correct 125 ms 6508 KB Output is correct
10 Correct 73 ms 5588 KB Output is correct
11 Correct 3 ms 3924 KB Output is correct
12 Correct 2 ms 3924 KB Output is correct
13 Correct 4 ms 3924 KB Output is correct
14 Correct 4 ms 3924 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 2 ms 3924 KB Output is correct
20 Correct 2 ms 3924 KB Output is correct
21 Correct 2 ms 3864 KB Output is correct
22 Correct 2 ms 3924 KB Output is correct
23 Correct 4 ms 3924 KB Output is correct
24 Correct 4 ms 3924 KB Output is correct
25 Correct 3 ms 3924 KB Output is correct
26 Correct 49 ms 4620 KB Output is correct
27 Correct 65 ms 6172 KB Output is correct
28 Correct 164 ms 6248 KB Output is correct
29 Correct 1078 ms 6124 KB Output is correct
30 Correct 1228 ms 6100 KB Output is correct
31 Correct 63 ms 6196 KB Output is correct
32 Correct 7 ms 3924 KB Output is correct
33 Correct 157 ms 5052 KB Output is correct
34 Correct 148 ms 6100 KB Output is correct
35 Correct 33 ms 4180 KB Output is correct
36 Correct 95 ms 5280 KB Output is correct
37 Correct 177 ms 5988 KB Output is correct
38 Correct 179 ms 6108 KB Output is correct
39 Correct 28 ms 4820 KB Output is correct
40 Correct 7 ms 4052 KB Output is correct
41 Correct 1968 ms 6952 KB Output is correct
42 Correct 350 ms 7200 KB Output is correct
43 Correct 1022 ms 6952 KB Output is correct
44 Correct 359 ms 7180 KB Output is correct
45 Correct 194 ms 7244 KB Output is correct
46 Execution timed out 2072 ms 7148 KB Time limit exceeded
47 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 3908 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 3948 KB Output is correct
9 Correct 98 ms 6044 KB Output is correct
10 Correct 27 ms 4436 KB Output is correct
11 Correct 70 ms 5588 KB Output is correct
12 Correct 46 ms 5252 KB Output is correct
13 Correct 93 ms 5892 KB Output is correct
14 Correct 56 ms 5204 KB Output is correct
15 Correct 14 ms 4304 KB Output is correct
16 Correct 56 ms 5204 KB Output is correct
17 Correct 125 ms 6508 KB Output is correct
18 Correct 73 ms 5588 KB Output is correct
19 Correct 3 ms 3924 KB Output is correct
20 Correct 2 ms 3924 KB Output is correct
21 Correct 4 ms 3924 KB Output is correct
22 Correct 4 ms 3924 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 2 ms 3924 KB Output is correct
28 Correct 2 ms 3924 KB Output is correct
29 Correct 2 ms 3864 KB Output is correct
30 Correct 2 ms 3924 KB Output is correct
31 Correct 4 ms 3924 KB Output is correct
32 Correct 4 ms 3924 KB Output is correct
33 Correct 3 ms 3924 KB Output is correct
34 Correct 49 ms 4620 KB Output is correct
35 Correct 65 ms 6172 KB Output is correct
36 Correct 164 ms 6248 KB Output is correct
37 Correct 1078 ms 6124 KB Output is correct
38 Correct 1228 ms 6100 KB Output is correct
39 Correct 63 ms 6196 KB Output is correct
40 Correct 7 ms 3924 KB Output is correct
41 Correct 157 ms 5052 KB Output is correct
42 Correct 148 ms 6100 KB Output is correct
43 Correct 33 ms 4180 KB Output is correct
44 Correct 95 ms 5280 KB Output is correct
45 Correct 177 ms 5988 KB Output is correct
46 Correct 179 ms 6108 KB Output is correct
47 Correct 28 ms 4820 KB Output is correct
48 Correct 7 ms 4052 KB Output is correct
49 Correct 1968 ms 6952 KB Output is correct
50 Correct 350 ms 7200 KB Output is correct
51 Correct 1022 ms 6952 KB Output is correct
52 Correct 359 ms 7180 KB Output is correct
53 Correct 194 ms 7244 KB Output is correct
54 Execution timed out 2072 ms 7148 KB Time limit exceeded
55 Halted 0 ms 0 KB -