oj.uz

Submission #237228

# Submission time Handle Problem Language Result Execution time Memory
237228 2020-06-05T10:13:43 Z kshitij_sodani Chessboard (IZhO18_chessboard) C++17
39 / 100
 99 ms 2912 KB 
#include <bits/stdc++.h>
using namespace std;
typedef int64_t llo;
#define mp make_pair
#define pb push_back
#define a first
#define b second
int n,k;
int aa,bb,cc,dd;
vector<pair<int,int>> cur;
int check(int nn){
	if(nn==n){
		return n*n;
	}
	int co;
	if((n/nn)%2==0){
		co=(n*n)/2;
	}
	else{
		co=(n*n-nn*nn)/2;
	}
	//cout<<co<<":";
	for(auto i:cur){
		if((i.a/nn+i.b/nn)%2==1){
			co-=1;
		}
		else{
			co+=1;
		}
	}
	int co2;
	if((n/nn)%2==0){
		co2=(n*n)/2;
	}
	else{
		co2=(n*n+nn*nn)/2;
	}
//	cout<<co2<<endl;
	for(auto i:cur){
		if((i.a/nn+i.b/nn)%2==0){
			co2-=1;
		}
		else{
			co2+=1;
		}
	}
//	cout<<nn<<","<<co<<","<<co2<<endl;
	return min(co,co2);
}
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cin>>n>>k;

	for(int i=0;i<k;i++){
		cin>>aa>>bb>>cc>>dd;
		aa-=1;
		bb-=1;
		cur.pb({aa,bb});
	}
	int ans=n*n;
	for(int i=1;i*i<=n;i++){
		if(n%i==0){
			ans=min(ans,check(i));
			ans=min(ans,check(n/i));
		}
	}
	cout<<ans<<endl;



	return 0;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 4 ms 256 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 32 ms 2556 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 15 ms 1280 KB Output is correct
17 Correct 31 ms 2812 KB Output is correct
18 Correct 41 ms 2912 KB Output is correct
19 Correct 90 ms 2812 KB Output is correct
20 Correct 99 ms 2828 KB Output is correct
21 Correct 29 ms 2812 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 24 ms 1664 KB Output is correct
24 Correct 42 ms 2812 KB Output is correct
25 Correct 9 ms 640 KB Output is correct
26 Correct 27 ms 1792 KB Output is correct
27 Correct 32 ms 2684 KB Output is correct
28 Correct 42 ms 2812 KB Output is correct
29 Correct 17 ms 1536 KB Output is correct
30 Correct 6 ms 384 KB Output is correct

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 32 ms 2556 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 4 ms 256 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Incorrect 32 ms 2556 KB Output isn't correct
10 Halted 0 ms 0 KB -