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Submission #253936

# Submission time Handle Problem Language Result Execution time Memory
253936 2020-07-29T06:17:44 Z ChrisT Jakarta Skyscrapers (APIO15_skyscraper) C++17
100 / 100
 94 ms 83832 KB 
#include<bits/stdc++.h>
#define hsh(x,y) (y)<<15|(x)
using namespace std;
const int MN = 30005;
int b[MN], p[MN];
pair<int,int> dq[11000000];
bitset<500000000> vis;
vector<int> st[MN];
int main () {
  int n,m;
  scanf ("%d %d",&n,&m);
  for (int i = 0; i < m; i++) {
	scanf ("%d %d",&b[i],&p[i]);
	st[b[i]].push_back(i);
  }
  int l = n, r = l + 1;
  dq[l] = {hsh(b[0],p[0]),0};
  while (l < r) {
	int power = dq[l].first>>15, cur = dq[l].first & 0x7FFF, dist = dq[l].second; ++l;
	if (cur == b[1]) return !printf ("%d\n",dist);
	for (int i : st[cur]) if (!vis[hsh(cur,p[i])]) {
	  vis[hsh(cur,p[i])] = 1;
	  dq[--l] = {hsh(cur,p[i]),dist};
	}
	st[cur].clear();
	if (cur >= power && !vis[hsh(cur-power,power)]) {
	  vis[hsh(cur-power,power)] = 1;
	  dq[r++] = {hsh(cur-power,power),dist+1};
	}
	if (cur + power < n && !vis[hsh(cur+power,power)]) {
	  vis[hsh(cur+power,power)] = 1;
	  dq[r++] = {hsh(cur+power,power),dist+1};
	}
  }
  printf ("-1\n");
  return 0;
}

Compilation message

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:11:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf ("%d %d",&n,&m);
   ~~~~~~^~~~~~~~~~~~~~~
skyscraper.cpp:13:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf ("%d %d",&b[i],&p[i]);
  ~~~~~~^~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1024 KB Output is correct
2 Correct 1 ms 1024 KB Output is correct
3 Correct 1 ms 1024 KB Output is correct
4 Correct 1 ms 1024 KB Output is correct
5 Correct 2 ms 1024 KB Output is correct
6 Correct 1 ms 1024 KB Output is correct
7 Correct 1 ms 1024 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1024 KB Output is correct
2 Correct 1 ms 1024 KB Output is correct
3 Correct 1 ms 1024 KB Output is correct
4 Correct 1 ms 1024 KB Output is correct
5 Correct 1 ms 1024 KB Output is correct
6 Correct 1 ms 1024 KB Output is correct
7 Correct 1 ms 1024 KB Output is correct
8 Correct 1 ms 1024 KB Output is correct
9 Correct 1 ms 1152 KB Output is correct
10 Correct 1 ms 1280 KB Output is correct
11 Correct 2 ms 1408 KB Output is correct
12 Correct 1 ms 1152 KB Output is correct
13 Correct 2 ms 1024 KB Output is correct
14 Correct 1 ms 1408 KB Output is correct
15 Correct 1 ms 1280 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1024 KB Output is correct
2 Correct 1 ms 1024 KB Output is correct
3 Correct 1 ms 1024 KB Output is correct
4 Correct 1 ms 1024 KB Output is correct
5 Correct 1 ms 1024 KB Output is correct
6 Correct 1 ms 1024 KB Output is correct
7 Correct 1 ms 1024 KB Output is correct
8 Correct 1 ms 1024 KB Output is correct
9 Correct 1 ms 1152 KB Output is correct
10 Correct 1 ms 1280 KB Output is correct
11 Correct 1 ms 1408 KB Output is correct
12 Correct 1 ms 1152 KB Output is correct
13 Correct 1 ms 1024 KB Output is correct
14 Correct 1 ms 1408 KB Output is correct
15 Correct 2 ms 1408 KB Output is correct
16 Correct 1 ms 1024 KB Output is correct
17 Correct 2 ms 2816 KB Output is correct
18 Correct 1 ms 1152 KB Output is correct
19 Correct 1 ms 1152 KB Output is correct
20 Correct 1 ms 1152 KB Output is correct
21 Correct 1 ms 1152 KB Output is correct
22 Correct 1 ms 1024 KB Output is correct
23 Correct 4 ms 3840 KB Output is correct
24 Correct 4 ms 5760 KB Output is correct
25 Correct 3 ms 2304 KB Output is correct
26 Correct 1 ms 1152 KB Output is correct
27 Correct 2 ms 1664 KB Output is correct
28 Correct 3 ms 2304 KB Output is correct
29 Correct 1 ms 1664 KB Output is correct
30 Correct 1 ms 1280 KB Output is correct
31 Correct 2 ms 1408 KB Output is correct
32 Correct 2 ms 1280 KB Output is correct
33 Correct 3 ms 2304 KB Output is correct
34 Correct 2 ms 1792 KB Output is correct

Subtask #4
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1024 KB Output is correct
2 Correct 1 ms 1024 KB Output is correct
3 Correct 1 ms 1024 KB Output is correct
4 Correct 1 ms 1024 KB Output is correct
5 Correct 1 ms 1024 KB Output is correct
6 Correct 1 ms 1024 KB Output is correct
7 Correct 1 ms 1024 KB Output is correct
8 Correct 1 ms 1024 KB Output is correct
9 Correct 1 ms 1152 KB Output is correct
10 Correct 1 ms 1280 KB Output is correct
11 Correct 2 ms 1408 KB Output is correct
12 Correct 1 ms 1152 KB Output is correct
13 Correct 1 ms 1024 KB Output is correct
14 Correct 2 ms 1408 KB Output is correct
15 Correct 2 ms 1408 KB Output is correct
16 Correct 1 ms 1024 KB Output is correct
17 Correct 3 ms 2816 KB Output is correct
18 Correct 1 ms 1152 KB Output is correct
19 Correct 1 ms 1152 KB Output is correct
20 Correct 1 ms 1152 KB Output is correct
21 Correct 1 ms 1152 KB Output is correct
22 Correct 1 ms 1024 KB Output is correct
23 Correct 3 ms 3840 KB Output is correct
24 Correct 5 ms 5760 KB Output is correct
25 Correct 3 ms 2304 KB Output is correct
26 Correct 1 ms 1152 KB Output is correct
27 Correct 1 ms 1664 KB Output is correct
28 Correct 2 ms 2304 KB Output is correct
29 Correct 2 ms 1664 KB Output is correct
30 Correct 1 ms 1152 KB Output is correct
31 Correct 1 ms 1408 KB Output is correct
32 Correct 2 ms 1280 KB Output is correct
33 Correct 3 ms 2304 KB Output is correct
34 Correct 2 ms 1792 KB Output is correct
35 Correct 14 ms 9600 KB Output is correct
36 Correct 4 ms 3584 KB Output is correct
37 Correct 10 ms 5248 KB Output is correct
38 Correct 16 ms 9600 KB Output is correct
39 Correct 10 ms 2304 KB Output is correct
40 Correct 14 ms 8064 KB Output is correct
41 Correct 15 ms 9088 KB Output is correct
42 Correct 7 ms 1536 KB Output is correct
43 Correct 7 ms 2048 KB Output is correct
44 Correct 7 ms 1536 KB Output is correct
45 Correct 16 ms 6008 KB Output is correct
46 Correct 11 ms 4352 KB Output is correct

Subtask #5
43.0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1024 KB Output is correct
2 Correct 1 ms 1024 KB Output is correct
3 Correct 1 ms 1024 KB Output is correct
4 Correct 1 ms 1024 KB Output is correct
5 Correct 1 ms 1024 KB Output is correct
6 Correct 1 ms 1024 KB Output is correct
7 Correct 1 ms 1024 KB Output is correct
8 Correct 1 ms 1024 KB Output is correct
9 Correct 1 ms 1152 KB Output is correct
10 Correct 2 ms 1280 KB Output is correct
11 Correct 2 ms 1408 KB Output is correct
12 Correct 2 ms 1152 KB Output is correct
13 Correct 1 ms 1024 KB Output is correct
14 Correct 2 ms 1408 KB Output is correct
15 Correct 2 ms 1408 KB Output is correct
16 Correct 2 ms 1024 KB Output is correct
17 Correct 3 ms 2816 KB Output is correct
18 Correct 1 ms 1152 KB Output is correct
19 Correct 1 ms 1152 KB Output is correct
20 Correct 2 ms 1152 KB Output is correct
21 Correct 1 ms 1152 KB Output is correct
22 Correct 1 ms 1024 KB Output is correct
23 Correct 3 ms 3840 KB Output is correct
24 Correct 5 ms 5760 KB Output is correct
25 Correct 2 ms 2304 KB Output is correct
26 Correct 1 ms 1152 KB Output is correct
27 Correct 2 ms 1664 KB Output is correct
28 Correct 2 ms 2304 KB Output is correct
29 Correct 2 ms 1664 KB Output is correct
30 Correct 1 ms 1152 KB Output is correct
31 Correct 1 ms 1408 KB Output is correct
32 Correct 1 ms 1280 KB Output is correct
33 Correct 3 ms 2432 KB Output is correct
34 Correct 2 ms 1792 KB Output is correct
35 Correct 14 ms 9600 KB Output is correct
36 Correct 5 ms 3584 KB Output is correct
37 Correct 9 ms 5376 KB Output is correct
38 Correct 16 ms 9600 KB Output is correct
39 Correct 10 ms 2304 KB Output is correct
40 Correct 15 ms 8064 KB Output is correct
41 Correct 14 ms 9088 KB Output is correct
42 Correct 7 ms 1536 KB Output is correct
43 Correct 7 ms 2048 KB Output is correct
44 Correct 7 ms 1536 KB Output is correct
45 Correct 15 ms 6008 KB Output is correct
46 Correct 13 ms 4352 KB Output is correct
47 Correct 15 ms 10496 KB Output is correct
48 Correct 10 ms 1664 KB Output is correct
49 Correct 8 ms 1664 KB Output is correct
50 Correct 6 ms 1536 KB Output is correct
51 Correct 65 ms 76536 KB Output is correct
52 Correct 71 ms 83832 KB Output is correct
53 Correct 21 ms 15744 KB Output is correct
54 Correct 1 ms 1152 KB Output is correct
55 Correct 1 ms 1280 KB Output is correct
56 Correct 10 ms 2628 KB Output is correct
57 Correct 2 ms 1152 KB Output is correct
58 Correct 7 ms 2304 KB Output is correct
59 Correct 8 ms 2304 KB Output is correct
60 Correct 7 ms 2304 KB Output is correct
61 Correct 9 ms 3456 KB Output is correct
62 Correct 34 ms 18936 KB Output is correct
63 Correct 40 ms 20984 KB Output is correct
64 Correct 48 ms 24312 KB Output is correct
65 Correct 56 ms 33912 KB Output is correct
66 Correct 94 ms 58816 KB Output is correct
67 Correct 51 ms 31356 KB Output is correct