oj.uz

Submission #377930

# Submission time Handle Problem Language Result Execution time Memory
377930 2021-03-15T14:56:56 Z rainboy Jakarta Skyscrapers (APIO15_skyscraper) C
100 / 100
 941 ms 174844 KB 
#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:15:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   15 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
skyscraper.c: In function 'main':
skyscraper.c:25:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   25 |  scanf("%d%d", &n, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~
skyscraper.c:31:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   31 |   scanf("%d%d", &i, &j), j = min(j, n);
      |   ^~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 44 ms 87276 KB Output is correct
2 Correct 1 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 47 ms 87276 KB Output is correct
6 Correct 44 ms 87276 KB Output is correct
7 Correct 44 ms 87276 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 43 ms 87276 KB Output is correct
2 Correct 1 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 45 ms 87420 KB Output is correct
6 Correct 44 ms 87404 KB Output is correct
7 Correct 44 ms 87276 KB Output is correct
8 Correct 44 ms 87276 KB Output is correct
9 Correct 45 ms 87276 KB Output is correct
10 Correct 44 ms 87404 KB Output is correct
11 Correct 45 ms 87404 KB Output is correct
12 Correct 44 ms 87404 KB Output is correct
13 Correct 45 ms 87404 KB Output is correct
14 Correct 44 ms 87404 KB Output is correct
15 Correct 44 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 1 ms 368 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 45 ms 87276 KB Output is correct
5 Correct 45 ms 87276 KB Output is correct
6 Correct 44 ms 87276 KB Output is correct
7 Correct 44 ms 87276 KB Output is correct
8 Correct 46 ms 87276 KB Output is correct
9 Correct 44 ms 87276 KB Output is correct
10 Correct 44 ms 87404 KB Output is correct
11 Correct 46 ms 87404 KB Output is correct
12 Correct 45 ms 87424 KB Output is correct
13 Correct 44 ms 87404 KB Output is correct
14 Correct 45 ms 87404 KB Output is correct
15 Correct 45 ms 87404 KB Output is correct
16 Correct 44 ms 87404 KB Output is correct
17 Correct 46 ms 87532 KB Output is correct
18 Correct 45 ms 87532 KB Output is correct
19 Correct 44 ms 87532 KB Output is correct
20 Correct 45 ms 87532 KB Output is correct
21 Correct 54 ms 87404 KB Output is correct
22 Correct 45 ms 87532 KB Output is correct
23 Correct 45 ms 87532 KB Output is correct
24 Correct 45 ms 87660 KB Output is correct
25 Correct 44 ms 87532 KB Output is correct
26 Correct 46 ms 87660 KB Output is correct
27 Correct 45 ms 87660 KB Output is correct
28 Correct 45 ms 87788 KB Output is correct
29 Correct 45 ms 88172 KB Output is correct
30 Correct 44 ms 87660 KB Output is correct
31 Correct 43 ms 87916 KB Output is correct
32 Correct 43 ms 87788 KB Output is correct
33 Correct 48 ms 88940 KB Output is correct
34 Correct 46 ms 88684 KB Output is correct

Subtask #4
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 87276 KB Output is correct
2 Correct 0 ms 236 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 43 ms 87276 KB Output is correct
5 Correct 42 ms 87276 KB Output is correct
6 Correct 42 ms 87276 KB Output is correct
7 Correct 43 ms 87276 KB Output is correct
8 Correct 43 ms 87276 KB Output is correct
9 Correct 42 ms 87276 KB Output is correct
10 Correct 42 ms 87404 KB Output is correct
11 Correct 46 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 43 ms 87404 KB Output is correct
16 Correct 43 ms 87404 KB Output is correct
17 Correct 43 ms 87532 KB Output is correct
18 Correct 45 ms 87532 KB Output is correct
19 Correct 43 ms 87680 KB Output is correct
20 Correct 44 ms 87532 KB Output is correct
21 Correct 44 ms 87404 KB Output is correct
22 Correct 43 ms 87532 KB Output is correct
23 Correct 43 ms 87532 KB Output is correct
24 Correct 43 ms 87660 KB Output is correct
25 Correct 46 ms 87660 KB Output is correct
26 Correct 45 ms 87660 KB Output is correct
27 Correct 43 ms 87660 KB Output is correct
28 Correct 43 ms 87788 KB Output is correct
29 Correct 46 ms 88172 KB Output is correct
30 Correct 43 ms 87660 KB Output is correct
31 Correct 43 ms 87840 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 88812 KB Output is correct
35 Correct 51 ms 88812 KB Output is correct
36 Correct 45 ms 87660 KB Output is correct
37 Correct 50 ms 89196 KB Output is correct
38 Correct 54 ms 89324 KB Output is correct
39 Correct 54 ms 89196 KB Output is correct
40 Correct 54 ms 89324 KB Output is correct
41 Correct 54 ms 89196 KB Output is correct
42 Correct 48 ms 88172 KB Output is correct
43 Correct 51 ms 88300 KB Output is correct
44 Correct 49 ms 88300 KB Output is correct
45 Correct 80 ms 93420 KB Output is correct
46 Correct 77 ms 92780 KB Output is correct

Subtask #5
43.0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 87276 KB Output is correct
2 Correct 1 ms 388 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 46 ms 87276 KB Output is correct
7 Correct 47 ms 87276 KB Output is correct
8 Correct 46 ms 87296 KB Output is correct
9 Correct 46 ms 87276 KB Output is correct
10 Correct 46 ms 87320 KB Output is correct
11 Correct 49 ms 87404 KB Output is correct
12 Correct 47 ms 87404 KB Output is correct
13 Correct 47 ms 87404 KB Output is correct
14 Correct 47 ms 87404 KB Output is correct
15 Correct 47 ms 87404 KB Output is correct
16 Correct 46 ms 87404 KB Output is correct
17 Correct 47 ms 87532 KB Output is correct
18 Correct 47 ms 87532 KB Output is correct
19 Correct 47 ms 87532 KB Output is correct
20 Correct 48 ms 87532 KB Output is correct
21 Correct 47 ms 87404 KB Output is correct
22 Correct 47 ms 87532 KB Output is correct
23 Correct 46 ms 87660 KB Output is correct
24 Correct 47 ms 87660 KB Output is correct
25 Correct 47 ms 87524 KB Output is correct
26 Correct 47 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 49 ms 88172 KB Output is correct
30 Correct 48 ms 87660 KB Output is correct
31 Correct 47 ms 87916 KB Output is correct
32 Correct 47 ms 87812 KB Output is correct
33 Correct 50 ms 89068 KB Output is correct
34 Correct 51 ms 88684 KB Output is correct
35 Correct 56 ms 88812 KB Output is correct
36 Correct 48 ms 87660 KB Output is correct
37 Correct 55 ms 89324 KB Output is correct
38 Correct 58 ms 89452 KB Output is correct
39 Correct 59 ms 89452 KB Output is correct
40 Correct 60 ms 89324 KB Output is correct
41 Correct 57 ms 89324 KB Output is correct
42 Correct 54 ms 88300 KB Output is correct
43 Correct 54 ms 88428 KB Output is correct
44 Correct 54 ms 88300 KB Output is correct
45 Correct 87 ms 93548 KB Output is correct
46 Correct 75 ms 92780 KB Output is correct
47 Correct 62 ms 94700 KB Output is correct
48 Correct 61 ms 91628 KB Output is correct
49 Correct 58 ms 90988 KB Output is correct
50 Correct 56 ms 91116 KB Output is correct
51 Correct 66 ms 92780 KB Output is correct
52 Correct 67 ms 93036 KB Output is correct
53 Correct 60 ms 90988 KB Output is correct
54 Correct 48 ms 90092 KB Output is correct
55 Correct 49 ms 90348 KB Output is correct
56 Correct 58 ms 90604 KB Output is correct
57 Correct 52 ms 93308 KB Output is correct
58 Correct 57 ms 91244 KB Output is correct
59 Correct 56 ms 91628 KB Output is correct
60 Correct 57 ms 91884 KB Output is correct
61 Correct 57 ms 91756 KB Output is correct
62 Correct 71 ms 95724 KB Output is correct
63 Correct 283 ms 117100 KB Output is correct
64 Correct 352 ms 123244 KB Output is correct
65 Correct 602 ms 137652 KB Output is correct
66 Correct 941 ms 174844 KB Output is correct
67 Correct 695 ms 161132 KB Output is correct