oj.uz

답안 #477365

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
477365 2021-10-01T19:39:00 Z BThero Cutting a rectangle (LMIO18_staciakampis) C++17
0 / 100
 1000 ms 1524 KB 
#include <bits/stdc++.h>

#define pb push_back
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()

using namespace std;

typedef long long ll;

set<vector<pair<int, int>>> S;
set<int> T;

void go(vector<pair<int, int>> vec) {
	for (int i = 0; i < sz(vec); i++) {
		if (vec[i].first < vec[i].second) {
			swap(vec[i].first, vec[i].second);
		}
	}

	sort(all(vec));

	if (S.insert(vec).second == 0) {
		return;
	}

	if (sz(vec) == 1) {
		T.insert(vec[0].second);
		return;
	}

	for (int a = 0; a < sz(vec); a++) {
		if (a + 1 < sz(vec) && vec[a].first == vec[a + 1].first) {
			vector<pair<int, int>> new_vec = vec;
			new_vec.erase(new_vec.begin() + a);
			new_vec.erase(new_vec.begin() + a);
			new_vec.pb({vec[a].first, vec[a].second + vec[a + 1].second});
			go(new_vec);
		}

		for (int b = a + 1; b < sz(vec); b++) {
			if (vec[a].first == vec[b].second) {
				vector<pair<int, int>> new_vec = vec;
				new_vec.erase(new_vec.begin() + b);
				new_vec.erase(new_vec.begin() + a);
				new_vec.pb({vec[a].first, vec[a].second + vec[b].first});
				go(new_vec);
			}

			if (vec[a].second == vec[b].second) {
				vector<pair<int, int>> new_vec = vec;
				new_vec.erase(new_vec.begin() + b);
				new_vec.erase(new_vec.begin() + a);
				new_vec.pb({vec[a].first + vec[b].first, vec[a].second});
				go(new_vec);
			}
		}
	}
}

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	int n;
	cin >> n;
	vector<pair<int, int>> a(n);
	ll sum = 0;

	for (int i = 0; i < n; i++) {
		cin >> a[i].first >> a[i].second;
		sum += a[i].first * 1ll * a[i].second;
	}

	if (n <= 10 && 0) {
		go(a);
	}
	else {
		auto check = [&](ll w, ll h) -> bool {
			vector<int> was(n, 0);
			int alive = n;
			bool changed = 1;

			while (alive && changed) {
				if (w < h) {
					swap(w, h);
				}

				changed = 0;

				for (int i = n - 1; ~i; i--) {
					if (!was[i] && a[i].first == w) {
						h -= a[i].second;
						was[i] = 1;
						--alive;
						changed = 1;
					}

					if (!was[i] && a[i].first == h) {
						w -= a[i].second;
						was[i] = 1;
						--alive;
						changed = 1;
					}
				}

				for (int i = n - 1; ~i; i--) {
					if (!was[i] && a[i].second == w) {
						h -= a[i].first;
						was[i] = 1;
						--alive;
						changed = 1;
					}

					if (!was[i] && a[i].second == h) {
						w -= a[i].second;
						was[i] = 1;
						--alive;
						changed = 1;
					}
				}
			}

			return alive == 0;
		};

		for (ll d = 1; d * d <= sum; d++) {
			if (sum % d == 0) {
				if (check(d, sum / d)) T.insert(d);
			}
		}
	}

	cout << sz(T) << '\n';

	for (int x : T) {
		cout << x << '\n';
	}

	return 0;
}

Subtask #1
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Incorrect 0 ms 204 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Execution timed out 1076 ms 1524 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #3
0 / 55.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Incorrect 0 ms 204 KB Output isn't correct
3 Halted 0 ms 0 KB -