oj.uz

Submission #495045

# Submission time Handle Problem Language Result Execution time Memory
495045 2021-12-18T03:55:26 Z Ziel Chessboard (IZhO18_chessboard) C++17
39 / 100
 87 ms 6312 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

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 (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 solve()':
chessboard.cpp:64:10: warning: variable 'flag' set but not used [-Wunused-but-set-variable]
   64 |     bool flag = 1;
      |          ^~~~
chessboard.cpp: In function 'void setIO(const string&)':
chessboard.cpp:179:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  179 |         freopen((f + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
chessboard.cpp:180:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  180 |         freopen((f + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4300 KB Output is correct
2 Correct 3 ms 4300 KB Output is correct
3 Correct 2 ms 4300 KB Output is correct
4 Correct 2 ms 4300 KB Output is correct
5 Correct 2 ms 4300 KB Output is correct
6 Correct 2 ms 4300 KB Output is correct
7 Correct 2 ms 4300 KB Output is correct
8 Correct 2 ms 4380 KB Output is correct

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 20 ms 5324 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 2 ms 4428 KB Output is correct
2 Correct 2 ms 4300 KB Output is correct
3 Correct 2 ms 4428 KB Output is correct
4 Correct 4 ms 4428 KB Output is correct
5 Correct 3 ms 4428 KB Output is correct
6 Correct 2 ms 4372 KB Output is correct
7 Correct 3 ms 4336 KB Output is correct
8 Correct 2 ms 4428 KB Output is correct
9 Correct 4 ms 4444 KB Output is correct
10 Correct 2 ms 4428 KB Output is correct
11 Correct 4 ms 4428 KB Output is correct
12 Correct 3 ms 4428 KB Output is correct
13 Correct 2 ms 4428 KB Output is correct
14 Correct 3 ms 4428 KB Output is correct
15 Correct 2 ms 4428 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4428 KB Output is correct
2 Correct 2 ms 4300 KB Output is correct
3 Correct 2 ms 4428 KB Output is correct
4 Correct 4 ms 4428 KB Output is correct
5 Correct 3 ms 4428 KB Output is correct
6 Correct 2 ms 4372 KB Output is correct
7 Correct 3 ms 4336 KB Output is correct
8 Correct 2 ms 4428 KB Output is correct
9 Correct 4 ms 4444 KB Output is correct
10 Correct 2 ms 4428 KB Output is correct
11 Correct 4 ms 4428 KB Output is correct
12 Correct 3 ms 4428 KB Output is correct
13 Correct 2 ms 4428 KB Output is correct
14 Correct 3 ms 4428 KB Output is correct
15 Correct 2 ms 4428 KB Output is correct
16 Correct 17 ms 5200 KB Output is correct
17 Correct 36 ms 6160 KB Output is correct
18 Correct 42 ms 6292 KB Output is correct
19 Correct 87 ms 6224 KB Output is correct
20 Correct 79 ms 6312 KB Output is correct
21 Correct 35 ms 6056 KB Output is correct
22 Correct 32 ms 4428 KB Output is correct
23 Correct 28 ms 5504 KB Output is correct
24 Correct 41 ms 6204 KB Output is correct
25 Correct 20 ms 4680 KB Output is correct
26 Correct 36 ms 5632 KB Output is correct
27 Correct 33 ms 5800 KB Output is correct
28 Correct 41 ms 6228 KB Output is correct
29 Correct 17 ms 5372 KB Output is correct
30 Correct 10 ms 4428 KB Output is correct

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 20 ms 5324 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4300 KB Output is correct
2 Correct 3 ms 4300 KB Output is correct
3 Correct 2 ms 4300 KB Output is correct
4 Correct 2 ms 4300 KB Output is correct
5 Correct 2 ms 4300 KB Output is correct
6 Correct 2 ms 4300 KB Output is correct
7 Correct 2 ms 4300 KB Output is correct
8 Correct 2 ms 4380 KB Output is correct
9 Incorrect 20 ms 5324 KB Output isn't correct
10 Halted 0 ms 0 KB -