Submission #377931

# Submission time Handle Problem Language Result Execution time Memory
377931 2021-03-15T14:57:59 Z rainboy Jakarta Skyscrapers (APIO15_skyscraper) C
57 / 100
1000 ms 174760 KB
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
#define N	30000
#define M	30000
#define M_	11111111
 
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];
	static int ii[M_], hh[N], nxt[M_ * 2], dd[M_], qu[M + M_];
	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;
		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(nxt, -1, sizeof nxt);
	for (j = 1; j < n; j++) {
		for (o = eo2[j]; o--; ) {
			h = eh2[j][o];
			hh[ii[h]] = h;
		}
		for (o = eo2[j]; o--; ) {
			int h_, h1;
 
			h = eh2[j][o];
			if (hh[ii[h]] == -1)
				continue;
			h_ = -1;
			for (i = ii[h] % j; i < n; i += j) {
				if (hh[i] == -1)
					ii[h1 = m_++] = i;
				else
					h1 = hh[i], hh[i] = -1;
				if (h_ != -1)
					nxt[h_ << 1 | 1] = h1, nxt[h1 << 1 | 0] = h_;
				h_ = h1;
			}
		}
	}
	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_;
 
		h = qu[cnt--, head++], i = ii[h], d = dd[h];
		if (h == 1) {
			printf("%d\n", d);
			return 0;
		}
		if (eo1[i]) {
			for (o = eo1[i]; o--; ) {
				h_ = eh1[i][o];
				if (dd[h_] > d)
					dd[h_] = d, qu[cnt++, --head] = h_;
			}
			eo1[i] = 0;
		}
		d++;
		h_ = nxt[h << 1 | 0];
		if (h_ != -1 && dd[h_] > d)
			dd[h_] = d, qu[head + cnt++] = h_;
		h_ = nxt[h << 1 | 1];
		if (h_ != -1 && dd[h_] > d)
			dd[h_] = d, qu[head + cnt++] = h_;
	}
	printf("-1\n");
	return 0;
}

Compilation message

skyscraper.c: In function 'append':
skyscraper.c:16:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   16 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
skyscraper.c: In function 'main':
skyscraper.c:26:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   26 |  scanf("%d%d", &n, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~
skyscraper.c:32:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   32 |   scanf("%d%d", &i, &j), j = min(j, n);
      |   ^~~~~~~~~~~~~~~~~~~~~
# Verdict Execution time Memory Grader output
1 Correct 46 ms 87276 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 47 ms 87276 KB Output is correct
5 Correct 47 ms 87276 KB Output is correct
6 Correct 49 ms 87276 KB Output is correct
7 Correct 48 ms 87276 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 47 ms 87276 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 47 ms 87276 KB Output is correct
5 Correct 54 ms 87424 KB Output is correct
6 Correct 47 ms 87276 KB Output is correct
7 Correct 48 ms 87276 KB Output is correct
8 Correct 47 ms 87276 KB Output is correct
9 Correct 48 ms 87276 KB Output is correct
10 Correct 47 ms 87404 KB Output is correct
11 Correct 51 ms 87404 KB Output is correct
12 Correct 46 ms 87404 KB Output is correct
13 Correct 46 ms 87404 KB Output is correct
14 Correct 46 ms 87404 KB Output is correct
15 Correct 47 ms 87404 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 44 ms 87296 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 45 ms 87276 KB Output is correct
5 Correct 44 ms 87276 KB Output is correct
6 Correct 44 ms 87276 KB Output is correct
7 Correct 43 ms 87296 KB Output is correct
8 Correct 44 ms 87404 KB Output is correct
9 Correct 43 ms 87276 KB Output is correct
10 Correct 43 ms 87404 KB Output is correct
11 Correct 44 ms 87404 KB Output is correct
12 Correct 45 ms 87404 KB Output is correct
13 Correct 44 ms 87404 KB Output is correct
14 Correct 43 ms 87412 KB Output is correct
15 Correct 43 ms 87404 KB Output is correct
16 Correct 43 ms 87412 KB Output is correct
17 Correct 46 ms 87532 KB Output is correct
18 Correct 44 ms 87532 KB Output is correct
19 Correct 44 ms 87532 KB Output is correct
20 Correct 46 ms 87532 KB Output is correct
21 Correct 43 ms 87404 KB Output is correct
22 Correct 43 ms 87532 KB Output is correct
23 Correct 44 ms 87532 KB Output is correct
24 Correct 44 ms 87660 KB Output is correct
25 Correct 43 ms 87532 KB Output is correct
26 Correct 44 ms 87660 KB Output is correct
27 Correct 44 ms 87808 KB Output is correct
28 Correct 45 ms 87788 KB Output is correct
29 Correct 44 ms 88160 KB Output is correct
30 Correct 44 ms 87660 KB Output is correct
31 Correct 44 ms 87916 KB Output is correct
32 Correct 46 ms 87788 KB Output is correct
33 Correct 47 ms 88940 KB Output is correct
34 Correct 47 ms 88684 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 42 ms 87276 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 43 ms 87276 KB Output is correct
5 Correct 44 ms 87276 KB Output is correct
6 Correct 44 ms 87276 KB Output is correct
7 Correct 43 ms 87276 KB Output is correct
8 Correct 45 ms 87276 KB Output is correct
9 Correct 43 ms 87276 KB Output is correct
10 Correct 43 ms 87404 KB Output is correct
11 Correct 44 ms 87404 KB Output is correct
12 Correct 43 ms 87404 KB Output is correct
13 Correct 44 ms 87404 KB Output is correct
14 Correct 43 ms 87404 KB Output is correct
15 Correct 44 ms 87392 KB Output is correct
16 Correct 44 ms 87404 KB Output is correct
17 Correct 44 ms 87532 KB Output is correct
18 Correct 43 ms 87552 KB Output is correct
19 Correct 45 ms 87544 KB Output is correct
20 Correct 45 ms 87532 KB Output is correct
21 Correct 45 ms 87404 KB Output is correct
22 Correct 44 ms 87532 KB Output is correct
23 Correct 44 ms 87532 KB Output is correct
24 Correct 44 ms 87660 KB Output is correct
25 Correct 46 ms 87532 KB Output is correct
26 Correct 44 ms 87660 KB Output is correct
27 Correct 44 ms 87660 KB Output is correct
28 Correct 44 ms 87788 KB Output is correct
29 Correct 44 ms 88172 KB Output is correct
30 Correct 44 ms 87756 KB Output is correct
31 Correct 44 ms 87916 KB Output is correct
32 Correct 44 ms 87788 KB Output is correct
33 Correct 47 ms 88940 KB Output is correct
34 Correct 46 ms 88684 KB Output is correct
35 Correct 52 ms 88812 KB Output is correct
36 Correct 44 ms 87660 KB Output is correct
37 Correct 52 ms 89324 KB Output is correct
38 Correct 57 ms 89452 KB Output is correct
39 Correct 57 ms 89324 KB Output is correct
40 Correct 54 ms 89324 KB Output is correct
41 Correct 55 ms 89324 KB Output is correct
42 Correct 54 ms 88300 KB Output is correct
43 Correct 51 ms 88428 KB Output is correct
44 Correct 54 ms 88300 KB Output is correct
45 Correct 73 ms 93548 KB Output is correct
46 Correct 68 ms 92524 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 59 ms 87276 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 44 ms 87276 KB Output is correct
5 Correct 47 ms 87276 KB Output is correct
6 Correct 44 ms 87276 KB Output is correct
7 Correct 43 ms 87276 KB Output is correct
8 Correct 50 ms 87276 KB Output is correct
9 Correct 43 ms 87404 KB Output is correct
10 Correct 67 ms 87436 KB Output is correct
11 Correct 59 ms 87404 KB Output is correct
12 Correct 44 ms 87404 KB Output is correct
13 Correct 44 ms 87404 KB Output is correct
14 Correct 43 ms 87404 KB Output is correct
15 Correct 48 ms 87404 KB Output is correct
16 Correct 45 ms 87404 KB Output is correct
17 Correct 46 ms 87532 KB Output is correct
18 Correct 54 ms 87532 KB Output is correct
19 Correct 44 ms 87532 KB Output is correct
20 Correct 44 ms 87532 KB Output is correct
21 Correct 53 ms 87404 KB Output is correct
22 Correct 53 ms 87532 KB Output is correct
23 Correct 49 ms 87552 KB Output is correct
24 Correct 45 ms 87660 KB Output is correct
25 Correct 44 ms 87532 KB Output is correct
26 Correct 44 ms 87660 KB Output is correct
27 Correct 53 ms 87660 KB Output is correct
28 Correct 50 ms 87788 KB Output is correct
29 Correct 54 ms 88172 KB Output is correct
30 Correct 44 ms 87660 KB Output is correct
31 Correct 44 ms 87916 KB Output is correct
32 Correct 44 ms 87788 KB Output is correct
33 Correct 49 ms 88940 KB Output is correct
34 Correct 52 ms 88684 KB Output is correct
35 Correct 57 ms 88684 KB Output is correct
36 Correct 44 ms 87660 KB Output is correct
37 Correct 51 ms 89196 KB Output is correct
38 Correct 55 ms 89196 KB Output is correct
39 Correct 58 ms 89196 KB Output is correct
40 Correct 66 ms 89196 KB Output is correct
41 Correct 76 ms 89196 KB Output is correct
42 Correct 49 ms 88172 KB Output is correct
43 Correct 50 ms 88300 KB Output is correct
44 Correct 51 ms 88172 KB Output is correct
45 Correct 102 ms 93420 KB Output is correct
46 Correct 82 ms 92524 KB Output is correct
47 Correct 64 ms 94380 KB Output is correct
48 Correct 57 ms 91244 KB Output is correct
49 Correct 58 ms 90860 KB Output is correct
50 Correct 56 ms 90988 KB Output is correct
51 Correct 66 ms 92652 KB Output is correct
52 Correct 61 ms 93056 KB Output is correct
53 Correct 57 ms 90988 KB Output is correct
54 Correct 55 ms 90092 KB Output is correct
55 Correct 52 ms 90348 KB Output is correct
56 Correct 54 ms 90476 KB Output is correct
57 Correct 49 ms 93292 KB Output is correct
58 Correct 54 ms 91116 KB Output is correct
59 Correct 56 ms 91372 KB Output is correct
60 Correct 62 ms 91628 KB Output is correct
61 Correct 65 ms 91628 KB Output is correct
62 Correct 65 ms 95596 KB Output is correct
63 Correct 268 ms 116872 KB Output is correct
64 Correct 306 ms 122988 KB Output is correct
65 Correct 629 ms 137588 KB Output is correct
66 Execution timed out 1092 ms 174760 KB Time limit exceeded
67 Halted 0 ms 0 KB -