Submission #25510

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
25510	2017-06-22T14:51:08 Z	gabrielsimoes	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	22 / 100	16 ms	3120 KB

skyscraper

#include <bits/stdc++.h>
using namespace std;
 
typedef pair<int,int> pii;
typedef long long ll;
const int MAXN = 3e4+10;
const ll INF = ll(MAXN)*ll(MAXN)*ll(MAXN);
 
int N, M, X, Y;
vector<int> v[MAXN];
bool ok[MAXN];
ll d[MAXN];
 
void dijkstra() {
	for (int i = 0; i < N; i++) d[i] = INF;
	d[X] = 0;
	
	while (true) {
		int cur = -1;
		for (int i = 0; i < N; i++)
			if (!ok[i] && (cur == -1 || d[i] < d[cur]))
				cur = i;
		if (cur == -1) return;
		ok[cur] = true;
	
		for (int dx : v[cur]) {
			int i = cur - dx, cnt = 1;
			while (i > 0)
				d[i] = min(d[i], d[cur] + cnt),
				i -= dx, cnt++;
	
			i = cur + dx, cnt = 1;
			while (i < N)
				d[i] = min(d[i], d[cur] + cnt),
				i += dx, cnt++;
		}
	}
}
 
int main()
{
	scanf("%d %d", &N, &M);
	for (int i = 0,a,b; i < M; i++) {
		scanf("%d %d", &a, &b);
		if (i == 0) X = a;
		else if (i == 1) Y = a;
		if (b != 0) v[a].push_back(b);
	}
	
	for (int i = 0; i < N; i++)
		sort(v[i].begin(), v[i].end()),
		v[i].resize(unique(v[i].begin(), v[i].end()) - v[i].begin());
 
	dijkstra();
	printf("%lld\n", d[Y] < INF ? d[Y] : -1);
}

Compilation message

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:42:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &N, &M);
                        ^
skyscraper.cpp:44:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &a, &b);
                         ^

Subtask #1
10.0 / 10.0

#	Verdict	Memory	Grader output
1	Correct	2988 KB	Output is correct
2	Correct	2988 KB	Output is correct
3	Correct	2988 KB	Output is correct
4	Correct	2988 KB	Output is correct
5	Correct	2988 KB	Output is correct
6	Correct	2988 KB	Output is correct
7	Correct	2988 KB	Output is correct

Subtask #2
12.0 / 12.0

#	Verdict	Memory	Grader output
1	Correct	2988 KB	Output is correct
2	Correct	2988 KB	Output is correct
3	Correct	2988 KB	Output is correct
4	Correct	2988 KB	Output is correct
5	Correct	2988 KB	Output is correct
6	Correct	2988 KB	Output is correct
7	Correct	2988 KB	Output is correct
8	Correct	2988 KB	Output is correct
9	Correct	2988 KB	Output is correct
10	Correct	2988 KB	Output is correct
11	Correct	2988 KB	Output is correct
12	Correct	2988 KB	Output is correct
13	Correct	2988 KB	Output is correct
14	Correct	2988 KB	Output is correct
15	Correct	2988 KB	Output is correct

Subtask #3
0 / 14.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	2988 KB	Output is correct
2	Correct	0 ms	2988 KB	Output is correct
3	Correct	0 ms	2988 KB	Output is correct
4	Correct	0 ms	2988 KB	Output is correct
5	Correct	0 ms	2988 KB	Output is correct
6	Correct	0 ms	2988 KB	Output is correct
7	Correct	0 ms	2988 KB	Output is correct
8	Correct	0 ms	2988 KB	Output is correct
9	Correct	0 ms	2988 KB	Output is correct
10	Correct	0 ms	2988 KB	Output is correct
11	Correct	0 ms	2988 KB	Output is correct
12	Correct	0 ms	2988 KB	Output is correct
13	Correct	0 ms	2988 KB	Output is correct
14	Correct	0 ms	2988 KB	Output is correct
15	Correct	0 ms	2988 KB	Output is correct
16	Correct	0 ms	2988 KB	Output is correct
17	Correct	3 ms	2988 KB	Output is correct
18	Correct	6 ms	2988 KB	Output is correct
19	Correct	6 ms	2988 KB	Output is correct
20	Correct	13 ms	3120 KB	Output is correct
21	Correct	0 ms	2988 KB	Output is correct
22	Correct	6 ms	2988 KB	Output is correct
23	Correct	6 ms	2988 KB	Output is correct
24	Correct	9 ms	2988 KB	Output is correct
25	Correct	9 ms	2988 KB	Output is correct
26	Correct	6 ms	2988 KB	Output is correct
27	Correct	9 ms	2988 KB	Output is correct
28	Incorrect	9 ms	3120 KB	Output isn't correct
29	Halted	0 ms	0 KB	-

Subtask #4
0 / 21.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	2988 KB	Output is correct
2	Correct	0 ms	2988 KB	Output is correct
3	Correct	0 ms	2988 KB	Output is correct
4	Correct	0 ms	2988 KB	Output is correct
5	Correct	0 ms	2988 KB	Output is correct
6	Correct	0 ms	2988 KB	Output is correct
7	Correct	0 ms	2988 KB	Output is correct
8	Correct	0 ms	2988 KB	Output is correct
9	Correct	0 ms	2988 KB	Output is correct
10	Correct	0 ms	2988 KB	Output is correct
11	Correct	0 ms	2988 KB	Output is correct
12	Correct	0 ms	2988 KB	Output is correct
13	Correct	0 ms	2988 KB	Output is correct
14	Correct	0 ms	2988 KB	Output is correct
15	Correct	0 ms	2988 KB	Output is correct
16	Correct	0 ms	2988 KB	Output is correct
17	Correct	3 ms	2988 KB	Output is correct
18	Correct	6 ms	2988 KB	Output is correct
19	Correct	9 ms	2988 KB	Output is correct
20	Correct	16 ms	3120 KB	Output is correct
21	Correct	0 ms	2988 KB	Output is correct
22	Correct	6 ms	2988 KB	Output is correct
23	Correct	6 ms	2988 KB	Output is correct
24	Correct	6 ms	2988 KB	Output is correct
25	Correct	9 ms	2988 KB	Output is correct
26	Correct	9 ms	2988 KB	Output is correct
27	Correct	9 ms	2988 KB	Output is correct
28	Incorrect	9 ms	3120 KB	Output isn't correct
29	Halted	0 ms	0 KB	-

Subtask #5
0 / 43.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	2988 KB	Output is correct
2	Correct	0 ms	2988 KB	Output is correct
3	Correct	0 ms	2988 KB	Output is correct
4	Correct	0 ms	2988 KB	Output is correct
5	Correct	0 ms	2988 KB	Output is correct
6	Correct	0 ms	2988 KB	Output is correct
7	Correct	0 ms	2988 KB	Output is correct
8	Correct	0 ms	2988 KB	Output is correct
9	Correct	0 ms	2988 KB	Output is correct
10	Correct	0 ms	2988 KB	Output is correct
11	Correct	0 ms	2988 KB	Output is correct
12	Correct	0 ms	2988 KB	Output is correct
13	Correct	0 ms	2988 KB	Output is correct
14	Correct	0 ms	2988 KB	Output is correct
15	Correct	0 ms	2988 KB	Output is correct
16	Correct	0 ms	2988 KB	Output is correct
17	Correct	3 ms	2988 KB	Output is correct
18	Correct	6 ms	2988 KB	Output is correct
19	Correct	9 ms	2988 KB	Output is correct
20	Correct	13 ms	3120 KB	Output is correct
21	Correct	0 ms	2988 KB	Output is correct
22	Correct	3 ms	2988 KB	Output is correct
23	Correct	6 ms	2988 KB	Output is correct
24	Correct	9 ms	2988 KB	Output is correct
25	Correct	9 ms	2988 KB	Output is correct
26	Correct	9 ms	2988 KB	Output is correct
27	Correct	9 ms	2988 KB	Output is correct
28	Incorrect	9 ms	3120 KB	Output isn't correct
29	Halted	0 ms	0 KB	-

Submission #25510

Compilation message

Subtask #1 10.0 / 10.0

Subtask #2 12.0 / 12.0

Subtask #3 0 / 14.0

Subtask #4 0 / 21.0

Subtask #5 0 / 43.0

Subtask #1
10.0 / 10.0

Subtask #2
12.0 / 12.0

Subtask #3
0 / 14.0

Subtask #4
0 / 21.0

Subtask #5
0 / 43.0