oj.uz

Submission #378910

# Submission time Handle Problem Language Result Execution time Memory
378910 2021-03-17T07:24:30 Z Fireball0424 Chessboard (IZhO18_chessboard) C++14
16 / 100
 39 ms 5228 KB 
#include <bits/stdc++.h>
#define int long long 
#define INF INT_MAX
#define ld long double
#define fr first
#define sc second
using namespace std;

struct rec{
	int x1, y1, x2, y2;
};

void solve(){
	int n, k;
	cin >> n >> k;
	vector<rec> v(k);
	for(int i = 0; i < k; i++){
		cin >> v[i].x1 >> v[i].y1 >> v[i].x2 >> v[i].y2; 
	}
	auto cal = [&](int x, int y, int len){
		int sum[4] = {};
		sum[0] = ((x / len) * (y / len) / 2) * (len * len); // all
		int ty = y % len, tx = x % len;
		if((x / len) & 1){
			sum[1] = ty * (x / len) / 2 * len;
		}
		else{
			sum[1] = ty * (x / len + 1) / 2 * len;
		}
		if((y / len) & 1){
			sum[2] = tx * (x / len) / 2 * len;
		}
		else{
			sum[2] = ty * (x / len + 1) / 2 * len;
		}
		if(((x / len) & 1) != ((y / len) & 1)){
			sum[3] = ty * tx;
		}
		int res = 0;
		for(int i = 0; i < 4; i++) res += sum[i];
		return res;
	};
	int mn = n * n;
	for(int i = 1; i < n; i++){
		if(n % i) continue;
		int sum[4] = {};
		for(auto j : v){
			int x1 = j.x1, x2 = j.x2, y1 = j.y1, y2 = j.y2;
			int tmp = cal(x2, y2, i) - cal(x2, y1 - 1, i) - cal(x1 - 1, y2, i) + cal(x1 - 1, y1 - 1, i);
			sum[0] += tmp; // cal black
			sum[1] += (x2 - x1 + 1) * (y2 - y1 + 1) - tmp; // cal white
		}
		sum[2] = cal(n, n, i) - sum[0];
		sum[3] = n * n - (sum[1] + sum[2]);
		mn = min(mn, sum[1] + sum[2]);
		mn = min(mn, sum[3]);
	}
	cout << mn;
}

main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	int t = 1;
	//cin >> t;
	while(t--) solve();
}

Compilation message

chessboard.cpp:61:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   61 | main(){
      |      ^

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 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

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 3820 KB Output is correct
2 Correct 7 ms 1260 KB Output is correct
3 Correct 19 ms 2540 KB Output is correct
4 Correct 21 ms 2668 KB Output is correct
5 Correct 24 ms 3308 KB Output is correct
6 Correct 18 ms 2284 KB Output is correct
7 Correct 4 ms 748 KB Output is correct
8 Correct 16 ms 2284 KB Output is correct
9 Correct 39 ms 5228 KB Output is correct
10 Correct 22 ms 3052 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 3820 KB Output is correct
2 Correct 7 ms 1260 KB Output is correct
3 Correct 19 ms 2540 KB Output is correct
4 Correct 21 ms 2668 KB Output is correct
5 Correct 24 ms 3308 KB Output is correct
6 Correct 18 ms 2284 KB Output is correct
7 Correct 4 ms 748 KB Output is correct
8 Correct 16 ms 2284 KB Output is correct
9 Correct 39 ms 5228 KB Output is correct
10 Correct 22 ms 3052 KB Output is correct
11 Incorrect 1 ms 364 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 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 28 ms 3820 KB Output is correct
10 Correct 7 ms 1260 KB Output is correct
11 Correct 19 ms 2540 KB Output is correct
12 Correct 21 ms 2668 KB Output is correct
13 Correct 24 ms 3308 KB Output is correct
14 Correct 18 ms 2284 KB Output is correct
15 Correct 4 ms 748 KB Output is correct
16 Correct 16 ms 2284 KB Output is correct
17 Correct 39 ms 5228 KB Output is correct
18 Correct 22 ms 3052 KB Output is correct
19 Incorrect 1 ms 364 KB Output isn't correct
20 Halted 0 ms 0 KB -