oj.uz

Submission #377921

# Submission time Handle Problem Language Result Execution time Memory
377921 2021-03-15T14:45:20 Z rainboy Jakarta Skyscrapers (APIO15_skyscraper) C
100 / 100
 953 ms 175084 KB 
#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:14:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   14 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
skyscraper.c: In function 'main':
skyscraper.c:24:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   24 |  scanf("%d%d", &n, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~
skyscraper.c:30:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   30 |   scanf("%d%d", &i, &j), j = min(j, n);
      |   ^~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 45 ms 87276 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 46 ms 87276 KB Output is correct
5 Correct 46 ms 87276 KB Output is correct
6 Correct 50 ms 87276 KB Output is correct
7 Correct 46 ms 87276 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 87276 KB Output is correct
2 Correct 0 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 51 ms 87276 KB Output is correct
7 Correct 48 ms 87276 KB Output is correct
8 Correct 46 ms 87276 KB Output is correct
9 Correct 46 ms 87276 KB Output is correct
10 Correct 46 ms 87404 KB Output is correct
11 Correct 46 ms 87404 KB Output is correct
12 Correct 47 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

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 46 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 46 ms 87276 KB Output is correct
6 Correct 45 ms 87276 KB Output is correct
7 Correct 47 ms 87276 KB Output is correct
8 Correct 45 ms 87276 KB Output is correct
9 Correct 46 ms 87276 KB Output is correct
10 Correct 46 ms 87404 KB Output is correct
11 Correct 46 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 46 ms 87404 KB Output is correct
16 Correct 46 ms 87424 KB Output is correct
17 Correct 46 ms 87532 KB Output is correct
18 Correct 46 ms 87660 KB Output is correct
19 Correct 46 ms 87532 KB Output is correct
20 Correct 47 ms 87532 KB Output is correct
21 Correct 46 ms 87404 KB Output is correct
22 Correct 46 ms 87532 KB Output is correct
23 Correct 47 ms 87532 KB Output is correct
24 Correct 47 ms 87660 KB Output is correct
25 Correct 47 ms 87552 KB Output is correct
26 Correct 46 ms 87660 KB Output is correct
27 Correct 47 ms 87660 KB Output is correct
28 Correct 51 ms 87788 KB Output is correct
29 Correct 48 ms 88172 KB Output is correct
30 Correct 47 ms 87788 KB Output is correct
31 Correct 48 ms 87928 KB Output is correct
32 Correct 47 ms 87788 KB Output is correct
33 Correct 49 ms 88940 KB Output is correct
34 Correct 48 ms 88684 KB Output is correct

Subtask #4
21.0 / 21.0

# 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 1 ms 364 KB Output is correct
4 Correct 46 ms 87412 KB Output is correct
5 Correct 45 ms 87276 KB Output is correct
6 Correct 47 ms 87276 KB Output is correct
7 Correct 47 ms 87532 KB Output is correct
8 Correct 51 ms 87276 KB Output is correct
9 Correct 52 ms 87276 KB Output is correct
10 Correct 46 ms 87552 KB Output is correct
11 Correct 48 ms 87404 KB Output is correct
12 Correct 47 ms 87404 KB Output is correct
13 Correct 46 ms 87404 KB Output is correct
14 Correct 48 ms 87440 KB Output is correct
15 Correct 46 ms 87404 KB Output is correct
16 Correct 46 ms 87404 KB Output is correct
17 Correct 46 ms 87532 KB Output is correct
18 Correct 46 ms 87532 KB Output is correct
19 Correct 46 ms 87532 KB Output is correct
20 Correct 46 ms 87532 KB Output is correct
21 Correct 48 ms 87404 KB Output is correct
22 Correct 46 ms 87532 KB Output is correct
23 Correct 47 ms 87532 KB Output is correct
24 Correct 47 ms 87660 KB Output is correct
25 Correct 47 ms 87660 KB Output is correct
26 Correct 47 ms 87624 KB Output is correct
27 Correct 48 ms 87660 KB Output is correct
28 Correct 47 ms 87788 KB Output is correct
29 Correct 47 ms 88172 KB Output is correct
30 Correct 47 ms 87660 KB Output is correct
31 Correct 48 ms 88044 KB Output is correct
32 Correct 57 ms 87788 KB Output is correct
33 Correct 49 ms 88940 KB Output is correct
34 Correct 49 ms 88684 KB Output is correct
35 Correct 55 ms 88940 KB Output is correct
36 Correct 48 ms 87660 KB Output is correct
37 Correct 54 ms 89324 KB Output is correct
38 Correct 60 ms 89580 KB Output is correct
39 Correct 57 ms 89452 KB Output is correct
40 Correct 57 ms 89452 KB Output is correct
41 Correct 56 ms 89452 KB Output is correct
42 Correct 53 ms 88300 KB Output is correct
43 Correct 54 ms 88556 KB Output is correct
44 Correct 53 ms 88428 KB Output is correct
45 Correct 84 ms 93676 KB Output is correct
46 Correct 70 ms 92780 KB Output is correct

Subtask #5
43.0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 46 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 46 ms 87276 KB Output is correct
5 Correct 46 ms 87276 KB Output is correct
6 Correct 45 ms 87276 KB Output is correct
7 Correct 46 ms 87276 KB Output is correct
8 Correct 48 ms 87276 KB Output is correct
9 Correct 46 ms 87276 KB Output is correct
10 Correct 46 ms 87404 KB Output is correct
11 Correct 48 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
16 Correct 49 ms 87552 KB Output is correct
17 Correct 46 ms 87532 KB Output is correct
18 Correct 46 ms 87492 KB Output is correct
19 Correct 47 ms 87532 KB Output is correct
20 Correct 46 ms 87532 KB Output is correct
21 Correct 46 ms 87404 KB Output is correct
22 Correct 48 ms 87532 KB Output is correct
23 Correct 49 ms 87660 KB Output is correct
24 Correct 47 ms 87660 KB Output is correct
25 Correct 48 ms 87532 KB Output is correct
26 Correct 46 ms 87660 KB Output is correct
27 Correct 47 ms 87660 KB Output is correct
28 Correct 48 ms 87788 KB Output is correct
29 Correct 47 ms 88316 KB Output is correct
30 Correct 46 ms 87660 KB Output is correct
31 Correct 47 ms 87916 KB Output is correct
32 Correct 46 ms 87788 KB Output is correct
33 Correct 50 ms 88940 KB Output is correct
34 Correct 48 ms 88684 KB Output is correct
35 Correct 56 ms 88940 KB Output is correct
36 Correct 48 ms 87660 KB Output is correct
37 Correct 54 ms 89324 KB Output is correct
38 Correct 57 ms 89580 KB Output is correct
39 Correct 58 ms 89452 KB Output is correct
40 Correct 56 ms 89452 KB Output is correct
41 Correct 57 ms 89452 KB Output is correct
42 Correct 54 ms 88300 KB Output is correct
43 Correct 53 ms 88428 KB Output is correct
44 Correct 53 ms 88428 KB Output is correct
45 Correct 81 ms 93676 KB Output is correct
46 Correct 77 ms 93036 KB Output is correct
47 Correct 60 ms 94700 KB Output is correct
48 Correct 58 ms 91500 KB Output is correct
49 Correct 56 ms 91116 KB Output is correct
50 Correct 55 ms 91116 KB Output is correct
51 Correct 63 ms 93036 KB Output is correct
52 Correct 67 ms 93164 KB Output is correct
53 Correct 61 ms 91116 KB Output is correct
54 Correct 48 ms 90092 KB Output is correct
55 Correct 48 ms 90348 KB Output is correct
56 Correct 57 ms 90604 KB Output is correct
57 Correct 54 ms 93292 KB Output is correct
58 Correct 55 ms 91244 KB Output is correct
59 Correct 57 ms 91628 KB Output is correct
60 Correct 55 ms 91884 KB Output is correct
61 Correct 56 ms 91884 KB Output is correct
62 Correct 68 ms 95852 KB Output is correct
63 Correct 235 ms 117100 KB Output is correct
64 Correct 270 ms 123116 KB Output is correct
65 Correct 544 ms 137580 KB Output is correct
66 Correct 953 ms 175084 KB Output is correct
67 Correct 678 ms 161260 KB Output is correct