oj.uz

Submission #381750

# Submission time Handle Problem Language Result Execution time Memory
381750 2021-03-25T20:18:58 Z rainboy Circle selection (APIO18_circle_selection) C
37 / 100
 3000 ms 162284 KB 
#include <stdio.h>
#include <string.h>

#define N	300000
#define X	1000000000
#define C	25

unsigned int Z = 12345;

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

long long xx[N], yy[N], rr[N];

#define intersect(i, j) ((xx[i] - xx[j]) * (xx[i] - xx[j]) + (yy[i] - yy[j]) * (yy[i] - yy[j]) <= (rr[i] + rr[j]) * (rr[i] + rr[j]))

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 compare(int x1, int y1, int x2, int y2) {
	return x1 != x2 ? x1 - x2 : y1 - y2;
}

int main() {
	static char type[N];
	static int xx_[N], yy_[N], ii[N], ii_[N], tmp[N], ggg[N][C], gg[C], iii[N][C * 4], kk[N], pp[N];
	int n, g, h, h_, i, j, k, c, lg, cnt;

	scanf("%d", &n);
	for (i = 0; i < n; i++) {
		scanf("%lld%lld%lld", &xx[i], &yy[i], &rr[i]);
		xx[i] += X, yy[i] += X;
		ii[i] = ii_[i] = i;
	}
	sort(ii, 0, n);
	for (lg = 30, h = 0; lg >= 0; lg--) {
		int x, y;

		for (i = 0; i < n; i++)
			xx_[i] = xx[i] >> lg + 1, yy_[i] = yy[i] >> lg + 1;
		memset(gg, 0, C * sizeof *gg);
		for (h_ = 0; h_ < n; h_++) {
			i = ii_[h_], x = xx_[i], y = yy_[i];
			for (c = 0; c < C; c++) {
				int dx = c / 5 - 2, dy = c % 5 - 2;

				while (gg[c] < n && compare(xx_[ii_[gg[c]]], yy_[ii_[gg[c]]], x + dx, y + dy) < 0)
					gg[c]++;
				ggg[i][c] = gg[c] < n && compare(xx_[ii_[gg[c]]], yy_[ii_[gg[c]]], x + dx, y + dy) == 0 ? gg[c] : -1;
			}
		}
		memset(kk, 0, n * sizeof *kk);
		for (h_ = h; h_ < n; h_++) {
			int p;

			i = ii[h_], x = xx_[i], y = yy_[i], p = -1;
			if (type[i] == -1)
				continue;
			g = ggg[i][(0 + 2) * 5 + (0 + 2)];
			if (g != -1)
				for (k = 0; k < kk[g]; k++) {
					j = iii[g][k];
					if (intersect(i, j)) {
						if (p == -1 || rr[p] < rr[j] || rr[p] == rr[j] && p > j)
							p = j;
						break;
					}
				}
			if (p != -1)
				pp[i] = p, type[i] = -1;
			else {
				pp[i] = i, type[i] = 1;
				if (rr[i] >= 1 << lg)
					for (c = 0; c < C; c++) {
						g = ggg[i][c];
						if (g != -1)
							iii[g][kk[g]++] = i;
					}
			}
		}
		while (h < n && rr[ii[h]] >= 1 << lg)
			h++;
		for (i = 0; i < n; i = j) {
			x = xx_[ii_[i]];
			j = i + 1;
			while (j < n && xx_[ii_[j]] == x)
				j++;
			cnt = 0;
			for (h_ = i; h_ < j; h_++)
				if ((xx[ii_[h_]] >> lg & 1) == 0)
					ii_[i++] = ii_[h_];
				else
					tmp[cnt++] = ii_[h_];
			memcpy(ii_ + i, tmp, cnt * sizeof *tmp);
		}
		for (i = 0; i < n; i = j) {
			x = xx[ii_[i]] >> lg, y = yy_[ii_[i]];
			j = i + 1;
			while (j < n && (xx[ii_[j]] >> lg) == x && yy_[ii_[j]] == y)
				j++;
			cnt = 0;
			for (h_ = i; h_ < j; h_++)
				if ((yy[ii_[h_]] >> lg & 1) == 0)
					ii_[i++] = ii_[h_];
				else
					tmp[cnt++] = ii_[h_];
			memcpy(ii_ + i, tmp, cnt * sizeof *tmp);
		}
	}
	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:60:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   60 |    xx_[i] = xx[i] >> lg + 1, yy_[i] = yy[i] >> lg + 1;
      |                      ~~~^~~
circle_selection.c:60:51: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   60 |    xx_[i] = xx[i] >> lg + 1, yy_[i] = yy[i] >> lg + 1;
      |                                                ~~~^~~
circle_selection.c:84:54: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   84 |       if (p == -1 || rr[p] < rr[j] || rr[p] == rr[j] && p > j)
      |                                       ~~~~~~~~~~~~~~~^~~~~~~~
circle_selection.c:49:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   49 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
circle_selection.c:51:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   51 |   scanf("%lld%lld%lld", &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 2 ms 364 KB Output is correct
7 Correct 2 ms 364 KB Output is correct
8 Correct 2 ms 364 KB Output is correct
9 Correct 2 ms 364 KB Output is correct
10 Correct 2 ms 364 KB Output is correct
11 Correct 2 ms 492 KB Output is correct
12 Correct 2 ms 492 KB Output is correct
13 Correct 2 ms 492 KB Output is correct
14 Correct 2 ms 492 KB Output is correct
15 Correct 2 ms 492 KB Output is correct
16 Correct 9 ms 620 KB Output is correct
17 Correct 9 ms 600 KB Output is correct
18 Correct 9 ms 492 KB Output is correct
19 Correct 47 ms 1260 KB Output is correct
20 Correct 39 ms 1132 KB Output is correct
21 Correct 43 ms 1260 KB Output is correct
22 Correct 43 ms 3180 KB Output is correct
23 Correct 52 ms 3180 KB Output is correct
24 Correct 43 ms 3052 KB Output is correct
25 Correct 43 ms 3052 KB Output is correct
26 Correct 43 ms 3180 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3084 ms 44908 KB Time limit exceeded
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 Correct 1151 ms 54892 KB Output is correct
3 Execution timed out 3088 ms 162028 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3088 ms 162284 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
30.0 / 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 2 ms 364 KB Output is correct
7 Correct 2 ms 364 KB Output is correct
8 Correct 2 ms 364 KB Output is correct
9 Correct 2 ms 364 KB Output is correct
10 Correct 2 ms 364 KB Output is correct
11 Correct 2 ms 492 KB Output is correct
12 Correct 2 ms 492 KB Output is correct
13 Correct 2 ms 492 KB Output is correct
14 Correct 2 ms 492 KB Output is correct
15 Correct 2 ms 492 KB Output is correct
16 Correct 9 ms 620 KB Output is correct
17 Correct 9 ms 600 KB Output is correct
18 Correct 9 ms 492 KB Output is correct
19 Correct 47 ms 1260 KB Output is correct
20 Correct 39 ms 1132 KB Output is correct
21 Correct 43 ms 1260 KB Output is correct
22 Correct 43 ms 3180 KB Output is correct
23 Correct 52 ms 3180 KB Output is correct
24 Correct 43 ms 3052 KB Output is correct
25 Correct 43 ms 3052 KB Output is correct
26 Correct 43 ms 3180 KB Output is correct
27 Correct 84 ms 2156 KB Output is correct
28 Correct 85 ms 2028 KB Output is correct
29 Correct 82 ms 1900 KB Output is correct
30 Correct 84 ms 5868 KB Output is correct
31 Correct 83 ms 5868 KB Output is correct
32 Correct 84 ms 5868 KB Output is correct
33 Correct 998 ms 15980 KB Output is correct
34 Correct 998 ms 15980 KB Output is correct
35 Correct 1027 ms 19948 KB Output is correct
36 Correct 1122 ms 55100 KB Output is correct
37 Correct 1098 ms 55108 KB Output is correct
38 Correct 1088 ms 55168 KB Output is correct
39 Correct 766 ms 55148 KB Output is correct
40 Correct 776 ms 55148 KB Output is correct
41 Correct 774 ms 55020 KB Output is correct
42 Correct 734 ms 54892 KB Output is correct
43 Correct 971 ms 54892 KB Output is correct
44 Correct 964 ms 54892 KB Output is correct
45 Correct 963 ms 54892 KB Output is correct
46 Correct 966 ms 55020 KB Output is correct
47 Correct 973 ms 54892 KB Output is correct
48 Correct 970 ms 54892 KB Output is correct
49 Correct 961 ms 54892 KB Output is correct
50 Correct 979 ms 54900 KB Output is correct

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 2 ms 364 KB Output is correct
7 Correct 2 ms 364 KB Output is correct
8 Correct 2 ms 364 KB Output is correct
9 Correct 2 ms 364 KB Output is correct
10 Correct 2 ms 364 KB Output is correct
11 Correct 2 ms 492 KB Output is correct
12 Correct 2 ms 492 KB Output is correct
13 Correct 2 ms 492 KB Output is correct
14 Correct 2 ms 492 KB Output is correct
15 Correct 2 ms 492 KB Output is correct
16 Correct 9 ms 620 KB Output is correct
17 Correct 9 ms 600 KB Output is correct
18 Correct 9 ms 492 KB Output is correct
19 Correct 47 ms 1260 KB Output is correct
20 Correct 39 ms 1132 KB Output is correct
21 Correct 43 ms 1260 KB Output is correct
22 Correct 43 ms 3180 KB Output is correct
23 Correct 52 ms 3180 KB Output is correct
24 Correct 43 ms 3052 KB Output is correct
25 Correct 43 ms 3052 KB Output is correct
26 Correct 43 ms 3180 KB Output is correct
27 Execution timed out 3084 ms 44908 KB Time limit exceeded
28 Halted 0 ms 0 KB -