Submission #519725

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
519725	2022-01-27T07:11:31 Z	naal	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	57 / 100	107 ms	41036 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;
		a[u].push_back(step);
		for (int &step : a[u]) {
			d[u][step] = min(d[u][step], total);
			if (u + step <= n && d[u + step][step] > d[u][step] + 1) {
				d[u + step][step] = d[u][step] + 1;
				pq.push({d[u][step] + 1, {u + step, step}});
			}
			if (u - step > 0 && d[u - step][step] > d[u][step] + 1) {
				d[u - step][step] = d[u][step] + 1;
				pq.push({d[u][step] + 1, {u - step, step}});
			}		
		}
		a[u].pop_back();
	}
	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	1 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	0 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	1 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	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	2 ms	1008 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	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	1 ms	332 KB	Output is correct
6	Correct	0 ms	332 KB	Output is correct
7	Correct	0 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	31296 KB	Output is correct
19	Correct	18 ms	39804 KB	Output is correct
20	Correct	18 ms	39756 KB	Output is correct
21	Correct	2 ms	3148 KB	Output is correct
22	Correct	15 ms	32376 KB	Output is correct
23	Correct	14 ms	27084 KB	Output is correct
24	Correct	17 ms	36300 KB	Output is correct
25	Correct	18 ms	39756 KB	Output is correct
26	Correct	18 ms	39756 KB	Output is correct
27	Correct	18 ms	39752 KB	Output is correct
28	Correct	20 ms	39780 KB	Output is correct
29	Correct	24 ms	39756 KB	Output is correct
30	Correct	20 ms	39756 KB	Output is correct
31	Correct	24 ms	39752 KB	Output is correct
32	Correct	20 ms	39748 KB	Output is correct
33	Correct	32 ms	39772 KB	Output is correct
34	Correct	25 ms	39756 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	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	1 ms	332 KB	Output is correct
7	Correct	0 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	15 ms	31308 KB	Output is correct
19	Correct	18 ms	39676 KB	Output is correct
20	Correct	19 ms	39732 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	27008 KB	Output is correct
24	Correct	18 ms	36392 KB	Output is correct
25	Correct	18 ms	39768 KB	Output is correct
26	Correct	19 ms	39784 KB	Output is correct
27	Correct	18 ms	39764 KB	Output is correct
28	Correct	23 ms	39756 KB	Output is correct
29	Correct	25 ms	39748 KB	Output is correct
30	Correct	26 ms	39708 KB	Output is correct
31	Correct	21 ms	39756 KB	Output is correct
32	Correct	20 ms	39744 KB	Output is correct
33	Correct	39 ms	39852 KB	Output is correct
34	Correct	26 ms	39856 KB	Output is correct
35	Correct	21 ms	27472 KB	Output is correct
36	Correct	8 ms	15052 KB	Output is correct
37	Correct	24 ms	38788 KB	Output is correct
38	Correct	25 ms	40332 KB	Output is correct
39	Correct	22 ms	40140 KB	Output is correct
40	Correct	22 ms	40140 KB	Output is correct
41	Correct	22 ms	40300 KB	Output is correct
42	Correct	22 ms	40088 KB	Output is correct
43	Correct	20 ms	40004 KB	Output is correct
44	Correct	22 ms	40040 KB	Output is correct
45	Correct	102 ms	41036 KB	Output is correct
46	Correct	84 ms	40968 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	0 ms	332 KB	Output is correct
4	Correct	1 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	0 ms	332 KB	Output is correct
8	Correct	0 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	1 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	13 ms	31204 KB	Output is correct
19	Correct	17 ms	39628 KB	Output is correct
20	Correct	18 ms	39764 KB	Output is correct
21	Correct	2 ms	3148 KB	Output is correct
22	Correct	14 ms	32308 KB	Output is correct
23	Correct	14 ms	27012 KB	Output is correct
24	Correct	22 ms	36292 KB	Output is correct
25	Correct	22 ms	39796 KB	Output is correct
26	Correct	18 ms	39684 KB	Output is correct
27	Correct	19 ms	39808 KB	Output is correct
28	Correct	20 ms	39756 KB	Output is correct
29	Correct	23 ms	39756 KB	Output is correct
30	Correct	20 ms	39756 KB	Output is correct
31	Correct	21 ms	39756 KB	Output is correct
32	Correct	21 ms	39780 KB	Output is correct
33	Correct	33 ms	39800 KB	Output is correct
34	Correct	27 ms	39804 KB	Output is correct
35	Correct	22 ms	27408 KB	Output is correct
36	Correct	8 ms	15052 KB	Output is correct
37	Correct	21 ms	38748 KB	Output is correct
38	Correct	28 ms	40316 KB	Output is correct
39	Correct	28 ms	40132 KB	Output is correct
40	Correct	24 ms	40120 KB	Output is correct
41	Correct	22 ms	40268 KB	Output is correct
42	Correct	21 ms	40080 KB	Output is correct
43	Correct	22 ms	40004 KB	Output is correct
44	Correct	21 ms	40044 KB	Output is correct
45	Correct	107 ms	41036 KB	Output is correct
46	Correct	75 ms	40952 KB	Output is correct
47	Runtime error	7 ms	1868 KB	Execution killed with signal 6
48	Halted	0 ms	0 KB	-