oj.uz

Submission #381205

# Submission time Handle Problem Language Result Execution time Memory
381205 2021-03-24T18:07:33 Z rainboy Circle selection (APIO18_circle_selection) C
7 / 100
 755 ms 1048580 KB 
#include <stdio.h>

#define N	300000

unsigned int X = 12345;

int rand_() {
	return (X *= 3) >> 1;
}

int xx[N], yy[N], rr_[N];

void sort(int *ii, int l, int r) {
	while (l < r) {
		int i = l, j = l, k = r, i_ = ii[l + rand_() % (r - l)], tmp;

		while (j < k) {
			int c = rr_[ii[j]] != rr_[i_] ? rr_[i_] - rr_[ii[j]] : ii[j] - i_;

			if (c == 0)
				j++;
			else if (c < 0) {
				tmp = ii[i], ii[i] = ii[j], ii[j] = tmp;
				i++, j++;
			} else {
				k--;
				tmp = ii[j], ii[j] = ii[k], ii[k] = tmp;
			}
		}
		sort(ii, l, i);
		l = k;
	}
}

int zz[1 + N], ll[1 + N], rr[1 + N], ii_[1 + N], u_, l_, r_;

int node(int i) {
	static int _ = 1;

	zz[_] = rand_();
	ii_[_] = i;
	return _++;
}

void split(int u, int x) {
	int x_;

	if (u == 0) {
		l_ = r_ = 0;
		return;
	}
	x_ = xx[u] - rr_[u];
	if (x_ < x) {
		split(rr[u], x);
		rr[u] = l_, l_ = u;
	} else {
		split(ll[u], x);
		ll[u] = r_, r_ = u;
	}
}

int merge(int u, int v) {
	if (u == 0)
		return v;
	if (v == 0)
		return u;
	if (zz[u] < zz[v]) {
		rr[u] = merge(rr[u], v);
		return u;
	} else {
		ll[v] = merge(u, ll[v]);
		return v;
	}
}

int first(int u) {
	return ll[u] == 0 ? u : first(ll[u]);
}

int last(int u) {
	return rr[u] == 0 ? u : last(rr[u]);
}

int main() {
	static int ii[N], pp[N];
	static char used[N];
	int n, i;

	scanf("%d", &n);
	for (i = 0; i < n; i++)
		scanf("%d%d%d", &xx[i], &yy[i], &rr_[i]);
	if (n <= 5000) {
		while (1) {
			int i_;

			i_ = -1;
			for (i = 0; i < n; i++)
				if (!used[i] && (i_ == -1 || rr_[i_] < rr_[i]))
					i_ = i;
			if (i_ == -1)
				break;
			for (i = 0; i < n; i++) {
				long long x = xx[i] - xx[i_], y = yy[i] - yy[i_], r = rr_[i] + rr_[i_];

				if (!used[i] && x * x + y * y <= r * r)
					used[i] = 1, pp[i] = i_;
			}
		}
	} else {
		for (i = 0; i < n; i++)
			ii[i] = i;
		sort(ii, 0, n);
		for (i = 0; i < n; i++) {
			int i_ = ii[i], p, q;

			split(u_, xx[i_] - rr_[i_]);
			p = l_ ? ii_[last(l_)] : -1, q = r_ ? ii_[first(r_)] : -1;
			if (p != -1 && xx[p] + rr_[p] < xx[i_] - rr_[i_])
				p = -1;
			if (q != -1 && xx[q] - rr_[q] > xx[i_] + rr_[i_])
				q = -1;
			if (p == -1 && q == -1)
				pp[i_] = i_, u_ = node(i_);
			else
				pp[i_] = q == -1 || p != -1 && (rr_[p] > rr_[q] || rr_[p] == rr_[q] && p < q) ? p : q;
			u_ = merge(merge(l_, u_), r_);
		}
	}
	for (i = 0; i < n; i++)
		printf("%d ", pp[i] + 1);
	printf("\n");
	return 0;
}

Compilation message

circle_selection.c: In function 'main':
circle_selection.c:125:73: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  125 |     pp[i_] = q == -1 || p != -1 && (rr_[p] > rr_[q] || rr_[p] == rr_[q] && p < q) ? p : q;
      |                                                        ~~~~~~~~~~~~~~~~~^~~~~~~~
circle_selection.c:125:33: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  125 |     pp[i_] = q == -1 || p != -1 && (rr_[p] > rr_[q] || rr_[p] == rr_[q] && p < q) ? p : q;
      |                         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
circle_selection.c:89:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   89 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
circle_selection.c:91:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   91 |   scanf("%d%d%d", &xx[i], &yy[i], &rr_[i]);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 3 ms 492 KB Output is correct
20 Correct 3 ms 492 KB Output is correct
21 Correct 3 ms 492 KB Output is correct
22 Correct 147 ms 492 KB Output is correct
23 Correct 144 ms 492 KB Output is correct
24 Correct 141 ms 480 KB Output is correct
25 Correct 144 ms 492 KB Output is correct
26 Correct 143 ms 492 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Runtime error 755 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Runtime error 651 ms 1048580 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Runtime error 738 ms 1048580 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 3 ms 492 KB Output is correct
20 Correct 3 ms 492 KB Output is correct
21 Correct 3 ms 492 KB Output is correct
22 Correct 147 ms 492 KB Output is correct
23 Correct 144 ms 492 KB Output is correct
24 Correct 141 ms 480 KB Output is correct
25 Correct 144 ms 492 KB Output is correct
26 Correct 143 ms 492 KB Output is correct
27 Runtime error 602 ms 1048580 KB Execution killed with signal 9
28 Halted 0 ms 0 KB -

Subtask #6
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 3 ms 492 KB Output is correct
20 Correct 3 ms 492 KB Output is correct
21 Correct 3 ms 492 KB Output is correct
22 Correct 147 ms 492 KB Output is correct
23 Correct 144 ms 492 KB Output is correct
24 Correct 141 ms 480 KB Output is correct
25 Correct 144 ms 492 KB Output is correct
26 Correct 143 ms 492 KB Output is correct
27 Runtime error 755 ms 1048576 KB Execution killed with signal 9
28 Halted 0 ms 0 KB -