Submission #519723

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
519723	2022-01-27T07:09:07 Z	naal	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	57 / 100	101 ms	41280 KB

skyscraper

// https://oj.uz/problem/view/APIO15_skyscraper
#include <bits/stdc++.h>
using namespace std;

#define Fname ((string) "io")
#define int long long
#define ii pair <int, int>
#define iii pair <int, ii>
#define fi first
#define se second
#define endl '\n'
const int INF = 1e16;
const int N = 3e3 + 5;

int n, m, d[N][N], goal;
vector <int> a[N];
priority_queue <iii, vector <iii>, greater <iii>> pq;

int find(int u) {
	for (int i = 1; i <= n; i++)
		for (int j = 0; j <= n; j++)
			d[i][j] = INF;
	pq.push({0, {u, 0}});
	d[u][0] = 0;
	while (pq.size()) {
		u = pq.top().se.fi;
		int step = pq.top().se.se, total = pq.top().fi;
		pq.pop();
		if (total != d[u][step])
			continue;
		if (u == goal)
			return total;
		for (int &j : a[u])
			if (d[u][j] > total) {
				d[u][j] = total;
				pq.push({total, {u, j}});
			}
		if (u + step <= n && d[u + step][step] > total + 1) {
			d[u + step][step] = total + 1;
			pq.push({total + 1, {u + step, step}});
		}
		if (u - step > 0 && d[u - step][step] > total + 1) {
			d[u - step][step] = total + 1;
			pq.push({total + 1, {u - step, step}});
		}		
	}
	return -1;
}

signed main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	#ifdef lan_ngu
		freopen((Fname + ".inp").c_str(), "r", stdin);
		freopen((Fname + ".out").c_str(), "w", stdout);
	#endif

	// int _nt; cin >> _nt;
	int _nt = 1;
	while (_nt--) {
		cin >> n >> m;
		int init;
		for (int i = 1; i <= m; i++) {
			int b, p; cin >> b >> p;
			b++;
			a[b].push_back(p);
			if (i == 1)
				init = b;
			else if (i == 2)
				goal = b;
		}	
		cout << find(init);
	}

	return 0;
}

Compilation message

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:72:20: warning: 'init' may be used uninitialized in this function [-Wmaybe-uninitialized]
   72 |   cout << find(init);
      |                    ^

Subtask #1

10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	332 KB	Output is correct
2	Correct	0 ms	332 KB	Output is correct
3	Correct	0 ms	332 KB	Output is correct
4	Correct	0 ms	332 KB	Output is correct
5	Correct	0 ms	332 KB	Output is correct
6	Correct	0 ms	332 KB	Output is correct
7	Correct	0 ms	332 KB	Output is correct

Subtask #2

12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	332 KB	Output is correct
2	Correct	1 ms	332 KB	Output is correct
3	Correct	0 ms	332 KB	Output is correct
4	Correct	0 ms	332 KB	Output is correct
5	Correct	1 ms	332 KB	Output is correct
6	Correct	0 ms	332 KB	Output is correct
7	Correct	1 ms	332 KB	Output is correct
8	Correct	1 ms	460 KB	Output is correct
9	Correct	0 ms	588 KB	Output is correct
10	Correct	1 ms	844 KB	Output is correct
11	Correct	1 ms	844 KB	Output is correct
12	Correct	1 ms	864 KB	Output is correct
13	Correct	1 ms	844 KB	Output is correct
14	Correct	2 ms	972 KB	Output is correct
15	Correct	2 ms	972 KB	Output is correct

Subtask #3

14.0 / 14.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	332 KB	Output is correct
2	Correct	0 ms	332 KB	Output is correct
3	Correct	0 ms	332 KB	Output is correct
4	Correct	0 ms	332 KB	Output is correct
5	Correct	1 ms	332 KB	Output is correct
6	Correct	1 ms	332 KB	Output is correct
7	Correct	0 ms	332 KB	Output is correct
8	Correct	0 ms	460 KB	Output is correct
9	Correct	0 ms	588 KB	Output is correct
10	Correct	1 ms	844 KB	Output is correct
11	Correct	1 ms	844 KB	Output is correct
12	Correct	1 ms	844 KB	Output is correct
13	Correct	1 ms	844 KB	Output is correct
14	Correct	2 ms	972 KB	Output is correct
15	Correct	1 ms	972 KB	Output is correct
16	Correct	1 ms	1484 KB	Output is correct
17	Correct	5 ms	7756 KB	Output is correct
18	Correct	14 ms	31280 KB	Output is correct
19	Correct	17 ms	39636 KB	Output is correct
20	Correct	18 ms	39796 KB	Output is correct
21	Correct	2 ms	3148 KB	Output is correct
22	Correct	16 ms	32332 KB	Output is correct
23	Correct	13 ms	26828 KB	Output is correct
24	Correct	17 ms	36300 KB	Output is correct
25	Correct	18 ms	39704 KB	Output is correct
26	Correct	18 ms	39716 KB	Output is correct
27	Correct	18 ms	39756 KB	Output is correct
28	Correct	20 ms	39780 KB	Output is correct
29	Correct	23 ms	39772 KB	Output is correct
30	Correct	19 ms	39820 KB	Output is correct
31	Correct	22 ms	39724 KB	Output is correct
32	Correct	20 ms	39756 KB	Output is correct
33	Correct	30 ms	39752 KB	Output is correct
34	Correct	26 ms	39808 KB	Output is correct

Subtask #4

21.0 / 21.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	332 KB	Output is correct
2	Correct	1 ms	332 KB	Output is correct
3	Correct	0 ms	332 KB	Output is correct
4	Correct	1 ms	332 KB	Output is correct
5	Correct	0 ms	332 KB	Output is correct
6	Correct	1 ms	332 KB	Output is correct
7	Correct	1 ms	332 KB	Output is correct
8	Correct	1 ms	460 KB	Output is correct
9	Correct	0 ms	588 KB	Output is correct
10	Correct	1 ms	844 KB	Output is correct
11	Correct	1 ms	844 KB	Output is correct
12	Correct	1 ms	844 KB	Output is correct
13	Correct	1 ms	844 KB	Output is correct
14	Correct	2 ms	972 KB	Output is correct
15	Correct	1 ms	972 KB	Output is correct
16	Correct	1 ms	1484 KB	Output is correct
17	Correct	4 ms	7756 KB	Output is correct
18	Correct	14 ms	31216 KB	Output is correct
19	Correct	17 ms	39628 KB	Output is correct
20	Correct	18 ms	39756 KB	Output is correct
21	Correct	1 ms	3148 KB	Output is correct
22	Correct	15 ms	32332 KB	Output is correct
23	Correct	13 ms	26828 KB	Output is correct
24	Correct	18 ms	36236 KB	Output is correct
25	Correct	18 ms	39756 KB	Output is correct
26	Correct	19 ms	39756 KB	Output is correct
27	Correct	19 ms	39756 KB	Output is correct
28	Correct	20 ms	39756 KB	Output is correct
29	Correct	24 ms	39712 KB	Output is correct
30	Correct	19 ms	39760 KB	Output is correct
31	Correct	21 ms	39692 KB	Output is correct
32	Correct	20 ms	39704 KB	Output is correct
33	Correct	32 ms	39756 KB	Output is correct
34	Correct	26 ms	39756 KB	Output is correct
35	Correct	22 ms	23368 KB	Output is correct
36	Correct	10 ms	14156 KB	Output is correct
37	Correct	25 ms	38828 KB	Output is correct
38	Correct	25 ms	40588 KB	Output is correct
39	Correct	23 ms	40396 KB	Output is correct
40	Correct	22 ms	40336 KB	Output is correct
41	Correct	24 ms	40524 KB	Output is correct
42	Correct	21 ms	40264 KB	Output is correct
43	Correct	21 ms	40268 KB	Output is correct
44	Correct	24 ms	40256 KB	Output is correct
45	Correct	101 ms	41220 KB	Output is correct
46	Correct	86 ms	41184 KB	Output is correct

Subtask #5

0 / 43.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	332 KB	Output is correct
2	Correct	1 ms	332 KB	Output is correct
3	Correct	1 ms	332 KB	Output is correct
4	Correct	1 ms	332 KB	Output is correct
5	Correct	0 ms	332 KB	Output is correct
6	Correct	0 ms	332 KB	Output is correct
7	Correct	1 ms	332 KB	Output is correct
8	Correct	1 ms	460 KB	Output is correct
9	Correct	1 ms	588 KB	Output is correct
10	Correct	1 ms	844 KB	Output is correct
11	Correct	1 ms	844 KB	Output is correct
12	Correct	1 ms	844 KB	Output is correct
13	Correct	1 ms	844 KB	Output is correct
14	Correct	2 ms	972 KB	Output is correct
15	Correct	1 ms	972 KB	Output is correct
16	Correct	1 ms	1484 KB	Output is correct
17	Correct	4 ms	7756 KB	Output is correct
18	Correct	14 ms	31268 KB	Output is correct
19	Correct	17 ms	39728 KB	Output is correct
20	Correct	18 ms	39696 KB	Output is correct
21	Correct	2 ms	3148 KB	Output is correct
22	Correct	15 ms	32332 KB	Output is correct
23	Correct	13 ms	26752 KB	Output is correct
24	Correct	18 ms	36300 KB	Output is correct
25	Correct	19 ms	39744 KB	Output is correct
26	Correct	18 ms	39756 KB	Output is correct
27	Correct	20 ms	39756 KB	Output is correct
28	Correct	20 ms	39672 KB	Output is correct
29	Correct	24 ms	39800 KB	Output is correct
30	Correct	20 ms	39712 KB	Output is correct
31	Correct	21 ms	39756 KB	Output is correct
32	Correct	20 ms	39756 KB	Output is correct
33	Correct	37 ms	39756 KB	Output is correct
34	Correct	26 ms	39804 KB	Output is correct
35	Correct	28 ms	23360 KB	Output is correct
36	Correct	8 ms	14156 KB	Output is correct
37	Correct	25 ms	38832 KB	Output is correct
38	Correct	26 ms	40592 KB	Output is correct
39	Correct	22 ms	40408 KB	Output is correct
40	Correct	22 ms	40372 KB	Output is correct
41	Correct	25 ms	40516 KB	Output is correct
42	Correct	21 ms	40264 KB	Output is correct
43	Correct	21 ms	40260 KB	Output is correct
44	Correct	22 ms	40296 KB	Output is correct
45	Correct	98 ms	41160 KB	Output is correct
46	Correct	70 ms	41280 KB	Output is correct
47	Runtime error	7 ms	2124 KB	Execution killed with signal 6
48	Halted	0 ms	0 KB	-