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Submission #377710

# Submission time Handle Problem Language Result Execution time Memory
377710 2021-03-14T20:37:25 Z rainboy Jakarta Skyscrapers (APIO15_skyscraper) C
57 / 100
 1000 ms 254316 KB 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define N	30000
#define M_	22222222

int min(int a, int b) { return a < b ? a : b; }

void append(int **eh, int *eo, int i, int h) {
	int o = eo[i]++;

	if (o >= 2 && (o & o - 1) == 0)
		eh[i] = (int *) realloc(eh[i], o * 2 * sizeof *eh[i]);
	eh[i][o] = h;
}

int main() {
	static int *eh1[N + 1], eo1[N + 1], *eh2[N + 1], eo2[N + 1], ii[M_], jj[M_], hh[N], pp[M_], qq[M_], dd[M_], qu[M_ * 2];
	int n, m, m_, h, i, j, o, head, cnt;

	scanf("%d%d", &n, &m);
	for (i = 0; i <= n; i++) {
		eh1[i] = (int *) malloc(2 * sizeof *eh1[i]);
		eh2[i] = (int *) malloc(2 * sizeof *eh2[i]);
	}
	for (h = 0; h < m; h++) {
		scanf("%d%d", &i, &j), j = min(j, n);
		ii[h] = i, jj[h] = j;
		append(eh1, eo1, i, h);
		append(eh2, eo2, j, h);
	}
	if (ii[0] == ii[1]) {
		printf("0\n");
		return 0;
	}
	m_ = m;
	memset(hh, -1, n * sizeof *hh);
	memset(pp, -1, sizeof pp), memset(qq, -1, sizeof qq);
	for (j = 1; j < n; j++) {
		for (o = eo2[j]; o--; ) {
			h = eh2[j][o];
			hh[ii[h]] = h;
		}
		for (o = eo2[j]; o--; ) {
			h = eh2[j][o];
			if (hh[ii[h]] != -1) {
				for (i = ii[h] % j; i < n; i += j)
					if (hh[i] == -1)
						ii[m_] = i, jj[m_] = j, hh[i] = m_++;
				for (i = ii[h] % j; i < n; i += j) {
					if (i + j < n)
						qq[hh[i]] = hh[i + j], pp[hh[i + j]] = hh[i];
					hh[i] = -1;
				}
			}
		}
	}
	for (h = 0; h < m_; h++)
		dd[h] = m_;
	head = m_, cnt = 0;
	dd[0] = 0, qu[head + cnt++] = 0;
	while (cnt) {
		int d, o;

		h = qu[cnt--, head++], i = ii[h], d = dd[h];
		if (h == 1) {
			printf("%d\n", d);
			return 0;
		}
		for (o = eo1[i]; o--; ) {
			int h_ = eh1[i][o];

			if (dd[h_] > d)
				dd[h_] = d, qu[cnt++, --head] = h_;
		}
		eo1[i] = 0;
		d++;
		if (pp[h] != -1 && dd[pp[h]] > d)
			dd[pp[h]] = d, qu[head + cnt++] = pp[h];
		if (qq[h] != -1 && dd[qq[h]] > d)
			dd[qq[h]] = d, qu[head + cnt++] = qq[h];
	}
	printf("-1\n");
	return 0;
}

Compilation message

skyscraper.c: In function 'append':
skyscraper.c:13:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   13 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
skyscraper.c: In function 'main':
skyscraper.c:19:71: warning: variable 'jj' set but not used [-Wunused-but-set-variable]
   19 |  static int *eh1[N + 1], eo1[N + 1], *eh2[N + 1], eo2[N + 1], ii[M_], jj[M_], hh[N], pp[M_], qq[M_], dd[M_], qu[M_ * 2];
      |                                                                       ^~
skyscraper.c:22:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   22 |  scanf("%d%d", &n, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~
skyscraper.c:28:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   28 |   scanf("%d%d", &i, &j), j = min(j, n);
      |   ^~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 97 ms 174316 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 96 ms 174316 KB Output is correct
5 Correct 96 ms 174292 KB Output is correct
6 Correct 95 ms 174316 KB Output is correct
7 Correct 96 ms 174316 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 97 ms 174292 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 99 ms 174316 KB Output is correct
5 Correct 96 ms 174444 KB Output is correct
6 Correct 95 ms 174316 KB Output is correct
7 Correct 98 ms 174316 KB Output is correct
8 Correct 98 ms 174316 KB Output is correct
9 Correct 95 ms 174316 KB Output is correct
10 Correct 95 ms 174316 KB Output is correct
11 Correct 99 ms 174444 KB Output is correct
12 Correct 95 ms 174316 KB Output is correct
13 Correct 97 ms 174316 KB Output is correct
14 Correct 98 ms 174444 KB Output is correct
15 Correct 97 ms 174572 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 95 ms 174316 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 106 ms 174316 KB Output is correct
5 Correct 95 ms 174316 KB Output is correct
6 Correct 97 ms 174316 KB Output is correct
7 Correct 97 ms 174316 KB Output is correct
8 Correct 94 ms 174316 KB Output is correct
9 Correct 95 ms 174316 KB Output is correct
10 Correct 95 ms 174316 KB Output is correct
11 Correct 96 ms 174444 KB Output is correct
12 Correct 96 ms 174316 KB Output is correct
13 Correct 98 ms 174444 KB Output is correct
14 Correct 97 ms 174444 KB Output is correct
15 Correct 99 ms 174444 KB Output is correct
16 Correct 94 ms 174316 KB Output is correct
17 Correct 97 ms 174572 KB Output is correct
18 Correct 99 ms 174572 KB Output is correct
19 Correct 97 ms 174572 KB Output is correct
20 Correct 100 ms 174572 KB Output is correct
21 Correct 95 ms 174316 KB Output is correct
22 Correct 96 ms 174444 KB Output is correct
23 Correct 97 ms 174592 KB Output is correct
24 Correct 97 ms 174700 KB Output is correct
25 Correct 100 ms 174572 KB Output is correct
26 Correct 100 ms 174572 KB Output is correct
27 Correct 96 ms 174572 KB Output is correct
28 Correct 98 ms 174688 KB Output is correct
29 Correct 96 ms 175212 KB Output is correct
30 Correct 99 ms 174700 KB Output is correct
31 Correct 100 ms 174860 KB Output is correct
32 Correct 97 ms 174700 KB Output is correct
33 Correct 103 ms 175852 KB Output is correct
34 Correct 101 ms 175724 KB Output is correct

Subtask #4
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 95 ms 174316 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 96 ms 174316 KB Output is correct
5 Correct 97 ms 174316 KB Output is correct
6 Correct 101 ms 174284 KB Output is correct
7 Correct 94 ms 174316 KB Output is correct
8 Correct 97 ms 174316 KB Output is correct
9 Correct 98 ms 174316 KB Output is correct
10 Correct 96 ms 174316 KB Output is correct
11 Correct 96 ms 174464 KB Output is correct
12 Correct 99 ms 174316 KB Output is correct
13 Correct 98 ms 174444 KB Output is correct
14 Correct 96 ms 174444 KB Output is correct
15 Correct 97 ms 174444 KB Output is correct
16 Correct 96 ms 174316 KB Output is correct
17 Correct 101 ms 174476 KB Output is correct
18 Correct 96 ms 174572 KB Output is correct
19 Correct 98 ms 174572 KB Output is correct
20 Correct 97 ms 174700 KB Output is correct
21 Correct 99 ms 174316 KB Output is correct
22 Correct 99 ms 174700 KB Output is correct
23 Correct 96 ms 174572 KB Output is correct
24 Correct 96 ms 174572 KB Output is correct
25 Correct 97 ms 174572 KB Output is correct
26 Correct 100 ms 174572 KB Output is correct
27 Correct 98 ms 174572 KB Output is correct
28 Correct 98 ms 174700 KB Output is correct
29 Correct 100 ms 175212 KB Output is correct
30 Correct 96 ms 174700 KB Output is correct
31 Correct 99 ms 174828 KB Output is correct
32 Correct 97 ms 174700 KB Output is correct
33 Correct 109 ms 175852 KB Output is correct
34 Correct 102 ms 175724 KB Output is correct
35 Correct 109 ms 175724 KB Output is correct
36 Correct 99 ms 174572 KB Output is correct
37 Correct 103 ms 176108 KB Output is correct
38 Correct 108 ms 176364 KB Output is correct
39 Correct 109 ms 176108 KB Output is correct
40 Correct 110 ms 176168 KB Output is correct
41 Correct 107 ms 176108 KB Output is correct
42 Correct 102 ms 175084 KB Output is correct
43 Correct 103 ms 175212 KB Output is correct
44 Correct 106 ms 175212 KB Output is correct
45 Correct 135 ms 180332 KB Output is correct
46 Correct 130 ms 179552 KB Output is correct

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 97 ms 174316 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 95 ms 174316 KB Output is correct
5 Correct 98 ms 174316 KB Output is correct
6 Correct 96 ms 174316 KB Output is correct
7 Correct 97 ms 174316 KB Output is correct
8 Correct 96 ms 174316 KB Output is correct
9 Correct 95 ms 174316 KB Output is correct
10 Correct 96 ms 174316 KB Output is correct
11 Correct 97 ms 174448 KB Output is correct
12 Correct 95 ms 174316 KB Output is correct
13 Correct 101 ms 174316 KB Output is correct
14 Correct 97 ms 174444 KB Output is correct
15 Correct 96 ms 174444 KB Output is correct
16 Correct 97 ms 174316 KB Output is correct
17 Correct 96 ms 174444 KB Output is correct
18 Correct 96 ms 174572 KB Output is correct
19 Correct 95 ms 174572 KB Output is correct
20 Correct 96 ms 174444 KB Output is correct
21 Correct 96 ms 174444 KB Output is correct
22 Correct 97 ms 174572 KB Output is correct
23 Correct 96 ms 174500 KB Output is correct
24 Correct 97 ms 174572 KB Output is correct
25 Correct 96 ms 174572 KB Output is correct
26 Correct 99 ms 174572 KB Output is correct
27 Correct 98 ms 174700 KB Output is correct
28 Correct 97 ms 174700 KB Output is correct
29 Correct 98 ms 175212 KB Output is correct
30 Correct 97 ms 174700 KB Output is correct
31 Correct 98 ms 174828 KB Output is correct
32 Correct 96 ms 174828 KB Output is correct
33 Correct 110 ms 175852 KB Output is correct
34 Correct 100 ms 175724 KB Output is correct
35 Correct 107 ms 175596 KB Output is correct
36 Correct 98 ms 174572 KB Output is correct
37 Correct 103 ms 176236 KB Output is correct
38 Correct 109 ms 176236 KB Output is correct
39 Correct 107 ms 176108 KB Output is correct
40 Correct 109 ms 176108 KB Output is correct
41 Correct 110 ms 176108 KB Output is correct
42 Correct 103 ms 175084 KB Output is correct
43 Correct 102 ms 175212 KB Output is correct
44 Correct 103 ms 175160 KB Output is correct
45 Correct 132 ms 180332 KB Output is correct
46 Correct 128 ms 179692 KB Output is correct
47 Correct 113 ms 181356 KB Output is correct
48 Correct 108 ms 178284 KB Output is correct
49 Correct 106 ms 177772 KB Output is correct
50 Correct 106 ms 177900 KB Output is correct
51 Correct 115 ms 179564 KB Output is correct
52 Correct 119 ms 179820 KB Output is correct
53 Correct 122 ms 177900 KB Output is correct
54 Correct 98 ms 177132 KB Output is correct
55 Correct 100 ms 177388 KB Output is correct
56 Correct 120 ms 177388 KB Output is correct
57 Correct 105 ms 180332 KB Output is correct
58 Correct 106 ms 178284 KB Output is correct
59 Correct 105 ms 178372 KB Output is correct
60 Correct 110 ms 178668 KB Output is correct
61 Correct 109 ms 178668 KB Output is correct
62 Correct 125 ms 182636 KB Output is correct
63 Correct 373 ms 203884 KB Output is correct
64 Correct 493 ms 210180 KB Output is correct
65 Correct 734 ms 224464 KB Output is correct
66 Execution timed out 1068 ms 254316 KB Time limit exceeded
67 Halted 0 ms 0 KB -