oj.uz

Submission #418850

# Submission time Handle Problem Language Result Execution time Memory
418850 2021-06-06T06:03:53 Z Kevin_Zhang_TW Cultivation (JOI17_cultivation) C++17
15 / 100
 1381 ms 460 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb emplace_back
#define AI(i) begin(i), end(i)
template<class T> bool chmin(T &a, T b) { return b < a && (a = b, true); }
template<class T> bool chmax(T &a, T b) { return a < b && (a = b, true); }
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template<class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
template<class T> void debug(T l, T r) { while (l != r) cerr << *l << " \n"[next(l)==r], ++l; }
#else
#define DE(...) 0
#define debug(...) 0
#endif

const int MAX_N = 305;

#define int ll
const int inf = 1ll << 55;
int R, C, n;
vector<pair<int,int>> loc;

bool can_cover(int ul, int dl, int al, int bl) {

	vector<vector<int>> pf_sum(50, vector<int> (50) );
	for (auto [x, y] : loc) {
		int A = y - ul, B = y + dl;
		int C = x - bl, D = x + al;
		chmax(A, 1ll);
		chmax(C, 1ll);
		chmin(D, R);
		chmin(B, ::C);
		++pf_sum[C][A];
		--pf_sum[D+1][A];
		--pf_sum[C][B+1];
		++pf_sum[D+1][B+1];
	}

	for (int i = 1;i <= R;++i) {
		for (int j = 1;j <= C;++j) {
			pf_sum[i][j] += pf_sum[i-1][j] + pf_sum[i][j-1] - pf_sum[i-1][j-1];
			if (pf_sum[i][j] == 0) return false;
		}
	}
	return true;
}

//int cal_up(int ul) {
//	int dnmn = 0;
//	{
//		vector<int> ys;
//		for (auto [x, y] : loc)
//			ys.pb(y - ul);
//		sort(AI(ys));
//		int lst_end = 0;
//		for (int y : ys) {
//			chmax(dnmn, y - 1 - lst_end);
//			lst_end = y + ul;
//		}
//		chmax(dnmn, C - lst_end);
//	}
//
//	vector<vector<tuple<int,int,int>>> op2, must;
//	vector<int> sep;
//
//	DE(ul);
//	auto all_op = [&]() {
//		op2.pb();
//		must.pb();
//		sort(AI(loc));
//
//		for (int i = 0;i < n;++i) {
//			auto [x, y] = loc[i];
//
//			DE(" gen ------------ ", x, y);
//			auto segmx = [&](int l, int r, int v) {
//				chmax(l, dnmn);
//				chmin(r, C);
//				if (l > r) return;
//				DE("segmx", l, r, v - x - 1);
//
//				sep.pb(l), sep.pb(r+1);
//				op2.back().pb(l, r+1, v - x - 1);
//			};
//			auto allmx = [&](int l, int r, int v) {
//				chmax(l, dnmn);
//				chmin(r, C);
//				if (l > r) return;
//				DE("mustmx", l, r, v - x - 1);
//
//				sep.pb(l), sep.pb(r+1);
//				must.back().pb(l, r+1, v - x - 1);
//			};
//
//			set<int> ys;
//			ys.insert(-inf);
//			ys.insert(inf);
//
//			int nl = 1, nr = C;
//			for (int j = i+1;j < n;++j) {
//				auto [cx, cy] = loc[j];
//				if (cx == x) continue;
//
//				if (cy <= y) chmax(nl, cy + 1);
//				if (cy >= y) chmin(nr, cy - ul - 1);
//
//				DE(cx, cy);
//				auto it = ys.lower_bound(cy);
//				int ly = *prev(it), ry = *it;  ys.insert(cy);
//				int s = -1, e = min(C - ly - 1, (ry - ul - 1) - ly - 1);
//				if (y <= ly || y >= ry) continue;
//				if (cy >= y) s = max<ll>(0, cy - ul - y);
//				else s = max<ll>(0, y - ul - cy);
//				segmx(s, e, cx);
//			}
//
//			DE(nl, nr);
//
//			if (nl > nr) continue;
//			if (nl == 1) allmx(0, C, R + 1);
//			else if (nl <= nr) allmx(0, nr - nl, R + 1);
//
//		}
//
//		DE(op2.size());
//		for (auto [l, r, v] : op2.back()) {
//			DE(l, r, v);
//		}
//   	};
//
//	all_op();
//	for (auto &[x, y] : loc) 
//		x = R - x + 1;
//
//	all_op();
//	for (auto &[x, y] : loc) 
//		x = R - x + 1;
//
//	sep.pb(C+1);
//
//	sort(AI(sep)); sep.erase(unique(AI(sep)), end(sep));
//
//	priority_queue<pair<int,int>> pq[2], pq2[2];
//	sort(AI(op2[0]));
//	sort(AI(op2[1]));
//	sort(AI(must[0]));
//	sort(AI(must[1]));
//
//	int h[2]{}, h2[2]{};
//
//	int res = inf;
//	for (int i = 0;i+1 < sep.size();++i) {
//		auto add_in = [&](auto &pq, auto &op, int &i) {
//			for (;i < op.size();++i) {
//				auto [l, r, v] = op[i];
//				if (l > sep[i]) break;
//				pq.emplace(v, r);
//			}
//		};
//		auto pops = [&](auto &pq) -> ll{
//			while (pq.size() && pq.top().second <= sep[i])
//				pq.pop();
//			return pq.size() ? pq.top().first : 0;
//		};
//
//		add_in(pq[0], op2[0], h[0]);
//		add_in(pq[1], op2[1], h[1]);
//		add_in(pq2[0], must[0], h2[0]);
//		add_in(pq2[1], must[1], h2[1]);
//
//
//		DE(sep[i], ul, 
//				max(pops(pq[0]), pops(pq[1])), pops(pq2[0]) + pops(pq2[1]));
//
//		int ld = pops(pq2[0]), rd = max(pops(pq2[1]), max(pops(pq[0]), pops(pq[1])) - ld), dn = sep[i];
//
//		assert(can_cover(ld, rd, ul, dn));
//
//		chmin(res, sep[i] + ul +
//				max({pops(pq[0]), pops(pq[1]), pops(pq2[0]) + pops(pq2[1])}));
//
//	}
//	DE(ul, res);
//	return res;
//}
int32_t main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	cin >> R >> C >> n; loc.resize(n);
	for (auto &[x, y] : loc) {
		cin >> x >> y;
	}
	sort(AI(loc));

	int res = inf;

	vector<int> ys;
	for (auto [x, y] : loc) ys.pb(y);


	for (int ul = 0;ul <= C;++ul) for (int dl = 0;dl <= C;++dl) {
		int A = R, B = R;
		while (B > 0 && can_cover(ul, dl, A, B-1)) --B;
		while (A > 0 && can_cover(ul, dl, A-1, B)) --A;
		if (can_cover(ul, dl, A, B))
			chmin(res, ul + dl + A + B);
	}

	// location should be the same
//	for (int y : ys) {
//		chmin(res, cal_up(y - 1));
//	}

	cout << res << '\n';
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 29 ms 312 KB Output is correct
18 Correct 180 ms 332 KB Output is correct
19 Correct 663 ms 316 KB Output is correct
20 Correct 130 ms 332 KB Output is correct
21 Correct 345 ms 336 KB Output is correct
22 Correct 1147 ms 312 KB Output is correct
23 Correct 699 ms 312 KB Output is correct
24 Correct 1234 ms 332 KB Output is correct
25 Correct 1180 ms 332 KB Output is correct
26 Correct 1337 ms 332 KB Output is correct
27 Correct 1362 ms 332 KB Output is correct
28 Correct 1187 ms 332 KB Output is correct
29 Correct 1129 ms 332 KB Output is correct
30 Correct 1366 ms 332 KB Output is correct
31 Correct 1375 ms 332 KB Output is correct
32 Correct 1381 ms 332 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 29 ms 312 KB Output is correct
18 Correct 180 ms 332 KB Output is correct
19 Correct 663 ms 316 KB Output is correct
20 Correct 130 ms 332 KB Output is correct
21 Correct 345 ms 336 KB Output is correct
22 Correct 1147 ms 312 KB Output is correct
23 Correct 699 ms 312 KB Output is correct
24 Correct 1234 ms 332 KB Output is correct
25 Correct 1180 ms 332 KB Output is correct
26 Correct 1337 ms 332 KB Output is correct
27 Correct 1362 ms 332 KB Output is correct
28 Correct 1187 ms 332 KB Output is correct
29 Correct 1129 ms 332 KB Output is correct
30 Correct 1366 ms 332 KB Output is correct
31 Correct 1375 ms 332 KB Output is correct
32 Correct 1381 ms 332 KB Output is correct
33 Runtime error 1 ms 460 KB Execution killed with signal 11
34 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 460 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 460 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 29 ms 312 KB Output is correct
18 Correct 180 ms 332 KB Output is correct
19 Correct 663 ms 316 KB Output is correct
20 Correct 130 ms 332 KB Output is correct
21 Correct 345 ms 336 KB Output is correct
22 Correct 1147 ms 312 KB Output is correct
23 Correct 699 ms 312 KB Output is correct
24 Correct 1234 ms 332 KB Output is correct
25 Correct 1180 ms 332 KB Output is correct
26 Correct 1337 ms 332 KB Output is correct
27 Correct 1362 ms 332 KB Output is correct
28 Correct 1187 ms 332 KB Output is correct
29 Correct 1129 ms 332 KB Output is correct
30 Correct 1366 ms 332 KB Output is correct
31 Correct 1375 ms 332 KB Output is correct
32 Correct 1381 ms 332 KB Output is correct
33 Runtime error 1 ms 460 KB Execution killed with signal 11
34 Halted 0 ms 0 KB -