oj.uz

Submission #334394

# Submission time Handle Problem Language Result Execution time Memory
334394 2020-12-09T05:50:28 Z tengiz05 Chessboard (IZhO18_chessboard) C++17
70 / 100
 363 ms 2668 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define FASTIO ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define pii pair<int, int>
#define ff first
#define ss second
#define PI acos(-1)
#define ld long double
const int mod = 1e9+7, N = 2e5+5;
int msb(int val){return sizeof(int)*8-__builtin_clzll(val);}
int a[N], n, m, k;

void solve(int test_case){
	int i, j;
	cin >> n >> k;
	vector<pii> v;
	for(i=0;i<k;i++){
		int x1, y1, x2, y2;
		cin >> x1 >> y1 >> x2 >> y2;
		v.pb({x1, y1});
	}
	int ans = mod*mod;
	
	for(int s=1; (int)s*s<=n; s++){
		if(n%s == 0){
			{
				int tmp = (int)s*s;
				int sum = ((int)((int)n*n/tmp)/2ll)*tmp;
				int sz = (s);
				int ans1=sum;
				for(i=0;i<k;i++){
					auto [x, y] = v[i];
					x+=sz-1, y+=sz-1;
					x/=sz, y/=sz;
					if((x+y)%2 == 0){
						ans1++;
					}else ans1--;
				}
				ans = min(ans, ans1);
			//	cout << ans << ' ';
				if(((int)n*n/tmp)%2!=0)sum += tmp;
				ans1 = sum;
				
				for(i=0;i<k;i++){
					auto [x, y] = v[i];
					x+=sz-1, y+=sz-1;
					x/=sz, y/=sz;
					if((x+y)%2 == 1){
						ans1++;
					}else ans1--;
				}
				ans = min(ans, ans1);
			//	cout << ans << ' ';
			}
			if((int)s*s != n && s != 1){
				int sz = ((int)n/s);
				int tmp = (int)(sz)*(sz);
				int sum = ((int)((int)n*n/tmp)/2ll)*tmp;
				int ans1=sum;
				for(i=0;i<k;i++){
					auto [x, y] = v[i];
					x+=sz-1, y+=sz-1;
					x/=sz, y/=sz;
					if((x+y)%2 == 0){
						ans1++;
					}else ans1--;
				}
				ans = min(ans, ans1);
			//	cout << ans << ' ';
				if((int)((int)n*n/tmp)%2ll!=0)sum += tmp;
				ans1 = sum;
				
				for(i=0;i<k;i++){
					auto [x, y] = v[i];
					x+=sz-1, y+=sz-1;
					x/=sz, y/=sz;
					if((x+y)%2 == 1){
						ans1++;
					}else ans1--;
				}
				ans = min(ans, ans1);
			//	cout << ans << ' ';
			}
		}
	}
	cout << ans << '\n';
	return;
}
/*

4 4
4 1 4 1
4 2 4 2
4 3 4 3
4 4 4 4


6 8
3 3 3 3
1 2 1 2
3 4 3 4
5 5 5 5
4 3 4 3
4 4 4 4
2 1 2 1
3 6 3 6

5 4
1 2 1 2
1 3 1 3
1 4 1 4
2 2 2 2

3 9
1 1 1 1
2 2 2 2
3 3 3 3
1 2 1 2
1 3 1 3
2 1 2 1
3 1 3 1
3 2 3 2
2 3 2 3


*/
signed main(){
	FASTIO;
#define MULTITEST 0
#if MULTITEST
	int ___T;
	cin >> ___T;
	for(int T_CASE = 1; T_CASE <= ___T; T_CASE++)
		solve(T_CASE);
#else
	solve(1);
#endif
	return 0;
}

Compilation message

chessboard.cpp: In function 'void solve(long long int)':
chessboard.cpp:17:9: warning: unused variable 'j' [-Wunused-variable]
   17 |  int i, j;
      |         ^

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 0 ms 364 KB Output is correct
7 Correct 0 ms 364 KB Output is correct
8 Correct 0 ms 364 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 1516 KB Output is correct
2 Correct 7 ms 1008 KB Output is correct
3 Correct 16 ms 1516 KB Output is correct
4 Correct 17 ms 1516 KB Output is correct
5 Correct 22 ms 1516 KB Output is correct
6 Correct 14 ms 1516 KB Output is correct
7 Correct 3 ms 620 KB Output is correct
8 Correct 17 ms 1516 KB Output is correct
9 Correct 36 ms 2536 KB Output is correct
10 Correct 20 ms 1516 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 11 ms 1008 KB Output is correct
17 Correct 29 ms 2536 KB Output is correct
18 Correct 40 ms 2536 KB Output is correct
19 Correct 83 ms 2536 KB Output is correct
20 Correct 93 ms 2536 KB Output is correct
21 Correct 29 ms 2536 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 21 ms 1516 KB Output is correct
24 Correct 34 ms 2536 KB Output is correct
25 Correct 5 ms 748 KB Output is correct
26 Correct 22 ms 1516 KB Output is correct
27 Correct 30 ms 2536 KB Output is correct
28 Correct 38 ms 2536 KB Output is correct
29 Correct 12 ms 1516 KB Output is correct
30 Correct 2 ms 492 KB Output is correct

Subtask #5
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 1516 KB Output is correct
2 Correct 7 ms 1008 KB Output is correct
3 Correct 16 ms 1516 KB Output is correct
4 Correct 17 ms 1516 KB Output is correct
5 Correct 22 ms 1516 KB Output is correct
6 Correct 14 ms 1516 KB Output is correct
7 Correct 3 ms 620 KB Output is correct
8 Correct 17 ms 1516 KB Output is correct
9 Correct 36 ms 2536 KB Output is correct
10 Correct 20 ms 1516 KB Output is correct
11 Correct 1 ms 512 KB Output is correct
12 Correct 0 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 1 ms 364 KB Output is correct
26 Correct 11 ms 1008 KB Output is correct
27 Correct 29 ms 2536 KB Output is correct
28 Correct 40 ms 2536 KB Output is correct
29 Correct 83 ms 2536 KB Output is correct
30 Correct 93 ms 2536 KB Output is correct
31 Correct 29 ms 2536 KB Output is correct
32 Correct 1 ms 364 KB Output is correct
33 Correct 21 ms 1516 KB Output is correct
34 Correct 34 ms 2536 KB Output is correct
35 Correct 5 ms 748 KB Output is correct
36 Correct 22 ms 1516 KB Output is correct
37 Correct 30 ms 2536 KB Output is correct
38 Correct 38 ms 2536 KB Output is correct
39 Correct 12 ms 1516 KB Output is correct
40 Correct 2 ms 492 KB Output is correct
41 Correct 80 ms 2536 KB Output is correct
42 Correct 42 ms 2536 KB Output is correct
43 Correct 54 ms 2536 KB Output is correct
44 Correct 41 ms 2668 KB Output is correct
45 Correct 38 ms 2536 KB Output is correct
46 Correct 90 ms 2536 KB Output is correct
47 Correct 34 ms 2536 KB Output is correct
48 Correct 48 ms 2536 KB Output is correct
49 Correct 37 ms 2536 KB Output is correct
50 Correct 334 ms 2536 KB Output is correct
51 Correct 353 ms 2536 KB Output is correct
52 Correct 328 ms 2536 KB Output is correct
53 Correct 351 ms 2536 KB Output is correct
54 Correct 325 ms 2568 KB Output is correct
55 Correct 363 ms 2536 KB Output is correct
56 Correct 313 ms 2536 KB Output is correct

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 0 ms 364 KB Output is correct
7 Correct 0 ms 364 KB Output is correct
8 Correct 0 ms 364 KB Output is correct
9 Correct 25 ms 1516 KB Output is correct
10 Correct 7 ms 1008 KB Output is correct
11 Correct 16 ms 1516 KB Output is correct
12 Correct 17 ms 1516 KB Output is correct
13 Correct 22 ms 1516 KB Output is correct
14 Correct 14 ms 1516 KB Output is correct
15 Correct 3 ms 620 KB Output is correct
16 Correct 17 ms 1516 KB Output is correct
17 Correct 36 ms 2536 KB Output is correct
18 Correct 20 ms 1516 KB Output is correct
19 Correct 1 ms 512 KB Output is correct
20 Correct 0 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 1 ms 364 KB Output is correct
26 Correct 1 ms 364 KB Output is correct
27 Correct 1 ms 364 KB Output is correct
28 Correct 1 ms 364 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 1 ms 364 KB Output is correct
32 Correct 1 ms 364 KB Output is correct
33 Correct 1 ms 364 KB Output is correct
34 Correct 11 ms 1008 KB Output is correct
35 Correct 29 ms 2536 KB Output is correct
36 Correct 40 ms 2536 KB Output is correct
37 Correct 83 ms 2536 KB Output is correct
38 Correct 93 ms 2536 KB Output is correct
39 Correct 29 ms 2536 KB Output is correct
40 Correct 1 ms 364 KB Output is correct
41 Correct 21 ms 1516 KB Output is correct
42 Correct 34 ms 2536 KB Output is correct
43 Correct 5 ms 748 KB Output is correct
44 Correct 22 ms 1516 KB Output is correct
45 Correct 30 ms 2536 KB Output is correct
46 Correct 38 ms 2536 KB Output is correct
47 Correct 12 ms 1516 KB Output is correct
48 Correct 2 ms 492 KB Output is correct
49 Correct 80 ms 2536 KB Output is correct
50 Correct 42 ms 2536 KB Output is correct
51 Correct 54 ms 2536 KB Output is correct
52 Correct 41 ms 2668 KB Output is correct
53 Correct 38 ms 2536 KB Output is correct
54 Correct 90 ms 2536 KB Output is correct
55 Correct 34 ms 2536 KB Output is correct
56 Correct 48 ms 2536 KB Output is correct
57 Correct 37 ms 2536 KB Output is correct
58 Correct 334 ms 2536 KB Output is correct
59 Correct 353 ms 2536 KB Output is correct
60 Correct 328 ms 2536 KB Output is correct
61 Correct 351 ms 2536 KB Output is correct
62 Correct 325 ms 2568 KB Output is correct
63 Correct 363 ms 2536 KB Output is correct
64 Correct 313 ms 2536 KB Output is correct
65 Correct 1 ms 364 KB Output is correct
66 Incorrect 1 ms 364 KB Output isn't correct
67 Halted 0 ms 0 KB -