oj.uz

Submission #851533

# Submission time Handle Problem Language Result Execution time Memory
851533 2023-09-20T04:46:01 Z dlalswp25 Circle selection (APIO18_circle_selection) C++17
19 / 100
 727 ms 177796 KB 
#include <bits/stdc++.h>

using namespace std;
typedef pair<int, int> pii;

const int K = 2;

int N;
int X[303030];
int Y[303030];
int R[303030];
int XL[303030];
int XR[303030];
int ans[303030];
int cur;
char rr;

void rf(int &x) {
	x = 0;
	int sgn = 0;
	while (rr < 48 && rr != '-') rr = getchar();
	if (rr == '-') { sgn = 1; rr = getchar(); }
	while (47 < rr) { x = (x << 3) + (x << 1) + (rr & 15); rr = getchar(); }
	if (sgn) x = -x;
}

inline bool intersect(int i, int j) {
	long long dx = X[i] - X[j], dy = Y[i] - Y[j], r = R[i] + R[j];
	return dx * dx + dy * dy <= r * r;
}

inline void chk(int cand) {
	int &t = ans[cur];
	if (pii(R[cand], -cand) < pii(R[t], -t)) return;
	if (intersect(cur, cand)) t = cand;
}

struct SegTree {
	struct Node {
		set<pii> s;
	};

	int n, base;
	vector<Node> T;
	vector<int> L;

	SegTree(int _n) : n(_n) {
		for (base = 1; base < n; base <<= 1);
		T.resize(base + base);
		L.resize(base + base);
		for (int i = base; i < base + base; i++) L[i] = i - base + 1;
		for (int i = base - 1; i >= 1; i--) L[i] = L[i << 1];
	}

	void chk_node(int idxl, int idxr, int y, int r) {
		auto itl = T[idxl].s.lower_bound({y, 0});
		auto itr = T[idxr].s.lower_bound({y, 0});
		auto tmpl = itl, tmpr = itr;
		if (idxl == idxr) {
			for (int i = 0; i < 2; i++) {
				if (itl == T[idxl].s.end()) break;
				chk(itl->second);
				if (itl->first >= (long long)y + r + r) break;
				if (i < K - 1) itl++;
			}
		} else {
			for (int i = 0; i < 3; i++) {
				bool fl = (itl == T[idxl].s.end());
				bool fr = (itr == T[idxr].s.end());
				if (fl && fr) break;
				if (fr || (!fl && itl->first < itr->first)) {
					chk(itl->second);
					if (i < 2) itl++;
				} else {
					chk(itr->second);
					if (i < 2) itr++;
				}
			}
		}
		itl = tmpl; itr = tmpr;
		if (idxl == idxr) {
			for (int i = 0; i < 2; i++) {
				if (itl == T[idxl].s.begin()) break;
				itl--;
				chk(itl->second);
				if (itl->first <= (long long)y - r - r) break;
			}
		} else {
			for (int i = 0; i < 3; i++) {
				bool fl = (itl == T[idxl].s.begin());
				bool fr = (itr == T[idxr].s.begin());
				if (fl && fr) break;
				if (fr || (!fl && prev(itl)->first < prev(itr)->first)) {
					itl--;
					chk(itl->second);
				} else {
					itr--;
					chk(itr->second);
				}
			}
		}

		// auto it = T[idx].s.lower_bound({y, 0});
		// auto tmp = it;
		// for (int i = 0; i < K; i++) {
		// 	if (it == T[idx].s.end()) break;
		// 	chk(it->second);
		// 	if (it->first >= (long long)y + r + r) break;
		// 	if (i < K - 1) it++;
		// }
		// it = tmp;
		// for (int i = 0; i < K; i++) {
		// 	if (it == T[idx].s.begin()) break;
		// 	it--;
		// 	chk(it->second);
		// 	if (it->first <= (long long)y - r - r) break;
		// }
	}

	void upd(int p, int q, pii x) {
		p += base; q += base;
		p--; q--;
		while (p <= q) {
			if (p & 1) T[p++].s.insert(x);
			if (~q & 1) T[q--].s.insert(x);
			p >>= 1; q >>= 1;
		}
	}

	void get(int p, int q, int y, int r) {
		p += base; q += base;
		p--; q--;
		while (p > 1) {
			chk_node(p, q, y, r);
			p >>= 1; q >>= 1;
		}
	}

	// void get(int p, int y, int r, int li) {
	// 	p += base; p--;
	// 	while (p >= 1) {
	// 		if (L[p] <= li) break;
	// 		chk_node(p, y, r);
	// 		p >>= 1;
	// 	}
	// }
};

int main() {
	rf(N);
	vector<int> v;
	for (int i = 1; i <= N; i++) {
		rf(X[i]); rf(Y[i]); rf(R[i]);
		XL[i] = X[i] - R[i], XR[i] = X[i] + R[i];
		v.push_back(XL[i]);
		v.push_back(XR[i]);
	}
	sort(v.begin(), v.end());
	v.erase(unique(v.begin(), v.end()), v.end());
	for (int i = 1; i <= N; i++) {
		XL[i] = lower_bound(v.begin(), v.end(), XL[i]) - v.begin() + 1;
		XR[i] = lower_bound(v.begin(), v.end(), XR[i]) - v.begin() + 1;
	}

	int M = v.size();
	SegTree seg(M);

	vector<int> idx(N);
	iota(idx.begin(), idx.end(), 1);
	sort(idx.begin(), idx.end(), [&](int a, int b) {
		return pii(R[a], -a) > pii(R[b], -b);
	});

	for (int i : idx) {
		cur = i;
		ans[i] = i;
		seg.get(XL[i], XR[i], Y[i], R[i]);
		// seg.get(XL[i], Y[i], R[i], 0);
		// seg.get(XR[i], Y[i], R[i], XL[i]);
		if (ans[i] == i) seg.upd(XL[i], XR[i], {Y[i], i});
	}

	for (int i = 1; i <= N; i++) printf("%d ", ans[i]); puts("");
	return 0;
}

Compilation message

circle_selection.cpp: In function 'int main()':
circle_selection.cpp:183:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  183 |  for (int i = 1; i <= N; i++) printf("%d ", ans[i]); puts("");
      |  ^~~
circle_selection.cpp:183:54: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  183 |  for (int i = 1; i <= N; i++) printf("%d ", ans[i]); puts("");
      |                                                      ^~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6488 KB Output is correct
3 Correct 1 ms 6488 KB Output is correct
4 Correct 1 ms 6488 KB Output is correct
5 Correct 1 ms 6488 KB Output is correct
6 Correct 1 ms 6744 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6488 KB Output is correct
9 Correct 1 ms 6488 KB Output is correct
10 Correct 1 ms 6488 KB Output is correct
11 Correct 1 ms 6488 KB Output is correct
12 Correct 1 ms 6488 KB Output is correct
13 Correct 1 ms 6488 KB Output is correct
14 Correct 1 ms 6488 KB Output is correct
15 Correct 1 ms 6492 KB Output is correct
16 Correct 1 ms 6744 KB Output is correct
17 Correct 1 ms 6744 KB Output is correct
18 Correct 1 ms 6744 KB Output is correct
19 Correct 5 ms 8280 KB Output is correct
20 Correct 5 ms 8280 KB Output is correct
21 Correct 5 ms 8280 KB Output is correct
22 Correct 6 ms 8792 KB Output is correct
23 Correct 10 ms 9560 KB Output is correct
24 Correct 6 ms 8792 KB Output is correct
25 Correct 5 ms 8536 KB Output is correct
26 Correct 5 ms 8796 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 356 ms 120828 KB Output is correct
2 Correct 377 ms 119864 KB Output is correct
3 Correct 360 ms 120532 KB Output is correct
4 Correct 369 ms 121044 KB Output is correct
5 Correct 301 ms 68688 KB Output is correct
6 Correct 381 ms 131764 KB Output is correct
7 Correct 368 ms 123820 KB Output is correct
8 Correct 405 ms 125156 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Incorrect 267 ms 57384 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 727 ms 177796 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6488 KB Output is correct
3 Correct 1 ms 6488 KB Output is correct
4 Correct 1 ms 6488 KB Output is correct
5 Correct 1 ms 6488 KB Output is correct
6 Correct 1 ms 6744 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6488 KB Output is correct
9 Correct 1 ms 6488 KB Output is correct
10 Correct 1 ms 6488 KB Output is correct
11 Correct 1 ms 6488 KB Output is correct
12 Correct 1 ms 6488 KB Output is correct
13 Correct 1 ms 6488 KB Output is correct
14 Correct 1 ms 6488 KB Output is correct
15 Correct 1 ms 6492 KB Output is correct
16 Correct 1 ms 6744 KB Output is correct
17 Correct 1 ms 6744 KB Output is correct
18 Correct 1 ms 6744 KB Output is correct
19 Correct 5 ms 8280 KB Output is correct
20 Correct 5 ms 8280 KB Output is correct
21 Correct 5 ms 8280 KB Output is correct
22 Correct 6 ms 8792 KB Output is correct
23 Correct 10 ms 9560 KB Output is correct
24 Correct 6 ms 8792 KB Output is correct
25 Correct 5 ms 8536 KB Output is correct
26 Correct 5 ms 8796 KB Output is correct
27 Correct 8 ms 10080 KB Output is correct
28 Correct 8 ms 10072 KB Output is correct
29 Correct 9 ms 10072 KB Output is correct
30 Correct 14 ms 11864 KB Output is correct
31 Correct 11 ms 11096 KB Output is correct
32 Correct 10 ms 11096 KB Output is correct
33 Correct 98 ms 35156 KB Output is correct
34 Correct 97 ms 35016 KB Output is correct
35 Correct 103 ms 35152 KB Output is correct
36 Correct 139 ms 47812 KB Output is correct
37 Correct 165 ms 48192 KB Output is correct
38 Correct 162 ms 50368 KB Output is correct
39 Incorrect 137 ms 12380 KB Output isn't correct
40 Halted 0 ms 0 KB -

Subtask #6
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6488 KB Output is correct
3 Correct 1 ms 6488 KB Output is correct
4 Correct 1 ms 6488 KB Output is correct
5 Correct 1 ms 6488 KB Output is correct
6 Correct 1 ms 6744 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6488 KB Output is correct
9 Correct 1 ms 6488 KB Output is correct
10 Correct 1 ms 6488 KB Output is correct
11 Correct 1 ms 6488 KB Output is correct
12 Correct 1 ms 6488 KB Output is correct
13 Correct 1 ms 6488 KB Output is correct
14 Correct 1 ms 6488 KB Output is correct
15 Correct 1 ms 6492 KB Output is correct
16 Correct 1 ms 6744 KB Output is correct
17 Correct 1 ms 6744 KB Output is correct
18 Correct 1 ms 6744 KB Output is correct
19 Correct 5 ms 8280 KB Output is correct
20 Correct 5 ms 8280 KB Output is correct
21 Correct 5 ms 8280 KB Output is correct
22 Correct 6 ms 8792 KB Output is correct
23 Correct 10 ms 9560 KB Output is correct
24 Correct 6 ms 8792 KB Output is correct
25 Correct 5 ms 8536 KB Output is correct
26 Correct 5 ms 8796 KB Output is correct
27 Correct 356 ms 120828 KB Output is correct
28 Correct 377 ms 119864 KB Output is correct
29 Correct 360 ms 120532 KB Output is correct
30 Correct 369 ms 121044 KB Output is correct
31 Correct 301 ms 68688 KB Output is correct
32 Correct 381 ms 131764 KB Output is correct
33 Correct 368 ms 123820 KB Output is correct
34 Correct 405 ms 125156 KB Output is correct
35 Correct 1 ms 6488 KB Output is correct
36 Incorrect 267 ms 57384 KB Output isn't correct
37 Halted 0 ms 0 KB -