oj.uz

Submission #495059

# Submission time Handle Problem Language Result Execution time Memory
495059 2021-12-18T04:07:16 Z Ziel Chessboard (IZhO18_chessboard) C++17
47 / 100
 105 ms 12960 KB 
/**
 * LES GREATEABLES BRO TEAM
**/

#include <bits/stdc++.h>

using namespace std;

using ll = long long;
#define sz(x) (int)x.size()
const bool FLAG = false;
void setIO(const string &f = "");

string to_string(const string s) {
	return '"' + s + '"';
}
string to_string(const char c) {
 	return char(39) + string(1, c) + char(39);
}
string to_string(const char* s) {
 	return to_string(string(s));
}
string to_string(bool f) {
	return (f ? "true" : "false");
}
template<class A, class B>
string to_string(const pair<A, B> x) {
	return "(" + to_string(x.first) + ", " + to_string(x.second) + ")";
}
template<class A, class B, class C>
string to_string(const tuple<A, B, C> x) {
	return "(" + to_string(get<0>(x)) + ", " + to_string(get<1>(x)) + ", " + to_string(get<2>(x)) + ")";
}
template<class A, class B, class C, class D>
string to_string(const tuple<A, B, C, D> x) {
	return "(" + to_string(get<0>(x)) + ", " + to_string(get<1>(x)) + ", " + to_string(get<2>(x)) + ", " + to_string(get<3>(x)) + ")";
}
template<class T>
string to_string(const T v) {
	string res = "{"; bool f = true;
	for (auto x: v)
		res += (f ? to_string(x) : ", " + to_string(x)), f = false;
	return res + "}";
}
void debug_args() { cerr << "]\n"; }
template<class H, class... T>
void debug_args(H x, T... y) {
	cerr << to_string(x);
	if (sizeof... (y))
	cerr << ", ";
	debug_args(y...);
}

#ifdef LOCAL
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]: [", debug_args(__VA_ARGS__);
#else
#define debug(...) 47
#endif

#define int ll

bool is_prime(int x) {
	if (x <= 1)
		return false;
	for (int i = 2; i * i <= x; i++)
		if (x % i == 0)
			return false;
	return true;
}

void solve() {
    int n, k;
    cin >> n >> k;
    vector<int> up(k + 1), left(k + 1), down(k + 1), right(k + 1);
    bool flag = 1;
    vector<vector<int>> a(1020, vector<int>(1020));
    for (int i = 1; i <= k; i++) {
    	cin >> up[i] >> left[i] >> down[i] >> right[i];
    	if (up[i] != down[i] || left[i] != right[i])
    		flag = 0;
    	if (n <= 1000) {
    		for (int ii = up[i]; ii <= down[i]; ii++)
    			for (int jj = left[i]; jj <= right[i]; jj++)
    				a[ii][jj] = 1;
    	}
    }

    if (n <= 1000) {
    	int ans = n * n * 3;
    	for (int len = 1; len * len <= n; len++) {
    		if (n % len == 0) {
    			int turn = 0, cur = 0, st_turn = 0;
    			for (int i = 1; i <= n; i += len) {
    				turn = st_turn;
 					st_turn ^= 1;
    				for (int j = 1; j <= n; j += len) {
    					for (int ii = i; ii < i + len; ii++) {
    						for (int jj = j; jj < j + len; jj++) {
    							if (a[ii][jj] != turn)
    								cur++;
    						}
    					}
    					turn ^= 1;
    				}
    			}
    			ans = min(ans, cur);

    			cur = 0, st_turn = 1;
    			for (int i = 1; i <= n; i += len) {
    				turn = st_turn;
 					st_turn ^= 1;
    				for (int j = 1; j <= n; j += len) {
    					for (int ii = i; ii < i + len; ii++) {
    						for (int jj = j; jj < j + len; jj++) {
    							if (a[ii][jj] != turn)
    								cur++;
    						}
    					}
    					turn ^= 1;
    				}
    			}
    			ans = min(ans, cur);


				if (len != 1) {
	    			int len2 = n / len;
    				st_turn = 0, cur = 0;
    				for (int i = 1; i <= n; i += len2) {
    					turn = st_turn;
 						st_turn ^= 1;
    					for (int j = 1; j <= n; j += len2) {
    						for (int ii = i; ii < i + len2; ii++) {
    							for (int jj = j; jj < j + len2; jj++) {
    								if (a[ii][jj] != turn)
    									cur++;
	    						}
    						}
    						turn ^= 1;
    					}
    				}
	    			ans = min(ans, cur);

    				cur = 0, st_turn = 1;
    				for (int i = 1; i <= n; i += len2) {
    					turn = st_turn;
 						st_turn ^= 1;
    					for (int j = 1; j <= n; j += len2) {
    						for (int ii = i; ii < i + len2; ii++) {
    							for (int jj = j; jj < j + len2; jj++) {
    								if (a[ii][jj] != turn)
    									cur++;
	    						}
    						}
    						turn ^= 1;
    					}
    				}
	    			ans = min(ans, cur);
				}
    		}
    	}
    	cout << ans;
    }

    else if (is_prime(n)) {
    	assert(flag);
    	vector<ll> v(2);
    	for (int i = 1; i <= k; i++) {
    		v[(up[i] + left[i]) % 2]++;
    	}
    	cout << min(v[0] + ((n * n) / 2 - v[1]), v[1] + ((n * n + 1) / 2 - v[0]));
    }

/*
    else if (flag) {
    	for (int i = 1; i <= k; i++) {
    		a[up[i]][left[i]] = 1;
    	}
    }*/
}

signed main() {
    setIO();
    
    int tt = 1;
    if (FLAG) {
    	cin >> tt;
    }
    while (tt--) {
    	solve();
    }
    
    return 0;
}

void setIO(const string &f) {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    if (fopen((f + ".in").c_str(), "r")) {
        freopen((f + ".in").c_str(), "r", stdin);
        freopen((f + ".out").c_str(), "w", stdout);
    }
}

Compilation message

chessboard.cpp: In function 'void setIO(const string&)':
chessboard.cpp:199:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  199 |         freopen((f + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
chessboard.cpp:200:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  200 |         freopen((f + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8396 KB Output is correct
2 Correct 4 ms 8396 KB Output is correct
3 Correct 4 ms 8396 KB Output is correct
4 Correct 4 ms 8396 KB Output is correct
5 Correct 4 ms 8396 KB Output is correct
6 Correct 4 ms 8396 KB Output is correct
7 Correct 3 ms 8396 KB Output is correct
8 Correct 4 ms 8396 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 10444 KB Output is correct
2 Correct 8 ms 9036 KB Output is correct
3 Correct 16 ms 9668 KB Output is correct
4 Correct 17 ms 9876 KB Output is correct
5 Correct 29 ms 10236 KB Output is correct
6 Correct 17 ms 9548 KB Output is correct
7 Correct 8 ms 8704 KB Output is correct
8 Correct 18 ms 9548 KB Output is correct
9 Correct 41 ms 11340 KB Output is correct
10 Correct 19 ms 10060 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8396 KB Output is correct
2 Correct 5 ms 8396 KB Output is correct
3 Correct 5 ms 8512 KB Output is correct
4 Correct 4 ms 8524 KB Output is correct
5 Correct 4 ms 8496 KB Output is correct
6 Correct 4 ms 8396 KB Output is correct
7 Correct 4 ms 8524 KB Output is correct
8 Correct 4 ms 8524 KB Output is correct
9 Correct 5 ms 8396 KB Output is correct
10 Correct 5 ms 8400 KB Output is correct
11 Correct 4 ms 8524 KB Output is correct
12 Correct 4 ms 8436 KB Output is correct
13 Correct 4 ms 8524 KB Output is correct
14 Correct 4 ms 8404 KB Output is correct
15 Correct 5 ms 8536 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8396 KB Output is correct
2 Correct 5 ms 8396 KB Output is correct
3 Correct 5 ms 8512 KB Output is correct
4 Correct 4 ms 8524 KB Output is correct
5 Correct 4 ms 8496 KB Output is correct
6 Correct 4 ms 8396 KB Output is correct
7 Correct 4 ms 8524 KB Output is correct
8 Correct 4 ms 8524 KB Output is correct
9 Correct 5 ms 8396 KB Output is correct
10 Correct 5 ms 8400 KB Output is correct
11 Correct 4 ms 8524 KB Output is correct
12 Correct 4 ms 8436 KB Output is correct
13 Correct 4 ms 8524 KB Output is correct
14 Correct 4 ms 8404 KB Output is correct
15 Correct 5 ms 8536 KB Output is correct
16 Correct 21 ms 9280 KB Output is correct
17 Correct 35 ms 11080 KB Output is correct
18 Correct 43 ms 11608 KB Output is correct
19 Correct 88 ms 11272 KB Output is correct
20 Correct 105 ms 11596 KB Output is correct
21 Correct 43 ms 10956 KB Output is correct
22 Correct 47 ms 8396 KB Output is correct
23 Correct 30 ms 9804 KB Output is correct
24 Correct 39 ms 11212 KB Output is correct
25 Correct 22 ms 8768 KB Output is correct
26 Correct 30 ms 10308 KB Output is correct
27 Correct 36 ms 10572 KB Output is correct
28 Correct 45 ms 11468 KB Output is correct
29 Correct 20 ms 9548 KB Output is correct
30 Correct 12 ms 8524 KB Output is correct

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 10444 KB Output is correct
2 Correct 8 ms 9036 KB Output is correct
3 Correct 16 ms 9668 KB Output is correct
4 Correct 17 ms 9876 KB Output is correct
5 Correct 29 ms 10236 KB Output is correct
6 Correct 17 ms 9548 KB Output is correct
7 Correct 8 ms 8704 KB Output is correct
8 Correct 18 ms 9548 KB Output is correct
9 Correct 41 ms 11340 KB Output is correct
10 Correct 19 ms 10060 KB Output is correct
11 Correct 4 ms 8396 KB Output is correct
12 Correct 5 ms 8396 KB Output is correct
13 Correct 5 ms 8512 KB Output is correct
14 Correct 4 ms 8524 KB Output is correct
15 Correct 4 ms 8496 KB Output is correct
16 Correct 4 ms 8396 KB Output is correct
17 Correct 4 ms 8524 KB Output is correct
18 Correct 4 ms 8524 KB Output is correct
19 Correct 5 ms 8396 KB Output is correct
20 Correct 5 ms 8400 KB Output is correct
21 Correct 4 ms 8524 KB Output is correct
22 Correct 4 ms 8436 KB Output is correct
23 Correct 4 ms 8524 KB Output is correct
24 Correct 4 ms 8404 KB Output is correct
25 Correct 5 ms 8536 KB Output is correct
26 Correct 21 ms 9280 KB Output is correct
27 Correct 35 ms 11080 KB Output is correct
28 Correct 43 ms 11608 KB Output is correct
29 Correct 88 ms 11272 KB Output is correct
30 Correct 105 ms 11596 KB Output is correct
31 Correct 43 ms 10956 KB Output is correct
32 Correct 47 ms 8396 KB Output is correct
33 Correct 30 ms 9804 KB Output is correct
34 Correct 39 ms 11212 KB Output is correct
35 Correct 22 ms 8768 KB Output is correct
36 Correct 30 ms 10308 KB Output is correct
37 Correct 36 ms 10572 KB Output is correct
38 Correct 45 ms 11468 KB Output is correct
39 Correct 20 ms 9548 KB Output is correct
40 Correct 12 ms 8524 KB Output is correct
41 Incorrect 27 ms 12960 KB Output isn't correct
42 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8396 KB Output is correct
2 Correct 4 ms 8396 KB Output is correct
3 Correct 4 ms 8396 KB Output is correct
4 Correct 4 ms 8396 KB Output is correct
5 Correct 4 ms 8396 KB Output is correct
6 Correct 4 ms 8396 KB Output is correct
7 Correct 3 ms 8396 KB Output is correct
8 Correct 4 ms 8396 KB Output is correct
9 Correct 21 ms 10444 KB Output is correct
10 Correct 8 ms 9036 KB Output is correct
11 Correct 16 ms 9668 KB Output is correct
12 Correct 17 ms 9876 KB Output is correct
13 Correct 29 ms 10236 KB Output is correct
14 Correct 17 ms 9548 KB Output is correct
15 Correct 8 ms 8704 KB Output is correct
16 Correct 18 ms 9548 KB Output is correct
17 Correct 41 ms 11340 KB Output is correct
18 Correct 19 ms 10060 KB Output is correct
19 Correct 4 ms 8396 KB Output is correct
20 Correct 5 ms 8396 KB Output is correct
21 Correct 5 ms 8512 KB Output is correct
22 Correct 4 ms 8524 KB Output is correct
23 Correct 4 ms 8496 KB Output is correct
24 Correct 4 ms 8396 KB Output is correct
25 Correct 4 ms 8524 KB Output is correct
26 Correct 4 ms 8524 KB Output is correct
27 Correct 5 ms 8396 KB Output is correct
28 Correct 5 ms 8400 KB Output is correct
29 Correct 4 ms 8524 KB Output is correct
30 Correct 4 ms 8436 KB Output is correct
31 Correct 4 ms 8524 KB Output is correct
32 Correct 4 ms 8404 KB Output is correct
33 Correct 5 ms 8536 KB Output is correct
34 Correct 21 ms 9280 KB Output is correct
35 Correct 35 ms 11080 KB Output is correct
36 Correct 43 ms 11608 KB Output is correct
37 Correct 88 ms 11272 KB Output is correct
38 Correct 105 ms 11596 KB Output is correct
39 Correct 43 ms 10956 KB Output is correct
40 Correct 47 ms 8396 KB Output is correct
41 Correct 30 ms 9804 KB Output is correct
42 Correct 39 ms 11212 KB Output is correct
43 Correct 22 ms 8768 KB Output is correct
44 Correct 30 ms 10308 KB Output is correct
45 Correct 36 ms 10572 KB Output is correct
46 Correct 45 ms 11468 KB Output is correct
47 Correct 20 ms 9548 KB Output is correct
48 Correct 12 ms 8524 KB Output is correct
49 Incorrect 27 ms 12960 KB Output isn't correct
50 Halted 0 ms 0 KB -