Submission #31324

# Submission time Handle Problem Language Result Execution time Memory
31324 2017-08-18T04:16:34 Z abcdef6199 Port Facility (JOI17_port_facility) C++
22 / 100
33 ms 2044 KB
#include <bits/stdc++.h>
using namespace std;

typedef long long LL;
typedef pair<int, int> II;

const int MAXN = 2000 + 10;
const int MOD  = (int) 1e9 + 7;
int n, a[MAXN], b[MAXN], c[MAXN];
bool ok;

void DFS(int u) {
	for (int v = 1; v <= n; ++v) {
		bool check1 = a[u] < a[v] && a[v] < b[u] && b[u] < b[v];
		bool check2 = a[v] < a[u] && a[u] < b[v] && b[v] < b[u];
		if (check1 || check2) {
			if (c[v] == -1) {
				c[v] = c[u] ^ 1;
				DFS(v);
			}
			else {
				if (c[v] == c[u]) ok = false;
			}
		}
	}
}

int main() {
	scanf("%d", &n);
	for (int i = 1; i <= n; ++i) scanf("%d%d", &a[i], &b[i]);

	int ans = 1; ok = true;
	for (int i = 1; i <= n; ++i) c[i] = -1;
	for (int i = 1; i <= n; ++i) if (c[i] == -1) {
		c[i] = 0; DFS(i);
		ans = (ans * 2) % MOD;
	}
	
	if (ok == false) puts("0"); else printf("%d\n", ans);
	return 0;
}

Compilation message

port_facility.cpp: In function 'int main()':
port_facility.cpp:29:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
                 ^
port_facility.cpp:30:58: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for (int i = 1; i <= n; ++i) scanf("%d%d", &a[i], &b[i]);
                                                          ^
# Verdict Execution time Memory Grader output
1 Correct 0 ms 2044 KB Output is correct
2 Correct 0 ms 2044 KB Output is correct
3 Correct 0 ms 2044 KB Output is correct
4 Correct 0 ms 2044 KB Output is correct
5 Correct 0 ms 2044 KB Output is correct
6 Correct 0 ms 2044 KB Output is correct
7 Correct 0 ms 2044 KB Output is correct
8 Correct 0 ms 2044 KB Output is correct
9 Correct 0 ms 2044 KB Output is correct
10 Correct 0 ms 2044 KB Output is correct
11 Correct 0 ms 2044 KB Output is correct
12 Correct 0 ms 2044 KB Output is correct
13 Correct 0 ms 2044 KB Output is correct
14 Correct 0 ms 2044 KB Output is correct
15 Correct 0 ms 2044 KB Output is correct
16 Correct 0 ms 2044 KB Output is correct
17 Correct 0 ms 2044 KB Output is correct
18 Correct 0 ms 2044 KB Output is correct
19 Correct 0 ms 2044 KB Output is correct
20 Correct 0 ms 2044 KB Output is correct
21 Correct 0 ms 2044 KB Output is correct
22 Correct 0 ms 2044 KB Output is correct
23 Correct 0 ms 2044 KB Output is correct
24 Correct 0 ms 2044 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 0 ms 2044 KB Output is correct
2 Correct 0 ms 2044 KB Output is correct
3 Correct 0 ms 2044 KB Output is correct
4 Correct 0 ms 2044 KB Output is correct
5 Correct 0 ms 2044 KB Output is correct
6 Correct 0 ms 2044 KB Output is correct
7 Correct 0 ms 2044 KB Output is correct
8 Correct 0 ms 2044 KB Output is correct
9 Correct 0 ms 2044 KB Output is correct
10 Correct 0 ms 2044 KB Output is correct
11 Correct 0 ms 2044 KB Output is correct
12 Correct 0 ms 2044 KB Output is correct
13 Correct 0 ms 2044 KB Output is correct
14 Correct 0 ms 2044 KB Output is correct
15 Correct 0 ms 2044 KB Output is correct
16 Correct 0 ms 2044 KB Output is correct
17 Correct 0 ms 2044 KB Output is correct
18 Correct 0 ms 2044 KB Output is correct
19 Correct 0 ms 2044 KB Output is correct
20 Correct 0 ms 2044 KB Output is correct
21 Correct 0 ms 2044 KB Output is correct
22 Correct 0 ms 2044 KB Output is correct
23 Correct 0 ms 2044 KB Output is correct
24 Correct 0 ms 2044 KB Output is correct
25 Correct 19 ms 2044 KB Output is correct
26 Correct 19 ms 2044 KB Output is correct
27 Correct 19 ms 2044 KB Output is correct
28 Correct 19 ms 2044 KB Output is correct
29 Correct 19 ms 2044 KB Output is correct
30 Correct 23 ms 2044 KB Output is correct
31 Correct 19 ms 2044 KB Output is correct
32 Correct 26 ms 2044 KB Output is correct
33 Correct 19 ms 2044 KB Output is correct
34 Correct 19 ms 2044 KB Output is correct
35 Correct 16 ms 2044 KB Output is correct
36 Correct 19 ms 2044 KB Output is correct
37 Correct 23 ms 2044 KB Output is correct
38 Correct 26 ms 2044 KB Output is correct
39 Correct 16 ms 2044 KB Output is correct
40 Correct 16 ms 2044 KB Output is correct
41 Correct 26 ms 2044 KB Output is correct
42 Correct 33 ms 2044 KB Output is correct
43 Correct 9 ms 2044 KB Output is correct
44 Correct 9 ms 2044 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 0 ms 2044 KB Output is correct
2 Correct 0 ms 2044 KB Output is correct
3 Correct 0 ms 2044 KB Output is correct
4 Correct 0 ms 2044 KB Output is correct
5 Correct 0 ms 2044 KB Output is correct
6 Correct 0 ms 2044 KB Output is correct
7 Correct 0 ms 2044 KB Output is correct
8 Correct 0 ms 2044 KB Output is correct
9 Correct 0 ms 2044 KB Output is correct
10 Correct 0 ms 2044 KB Output is correct
11 Correct 0 ms 2044 KB Output is correct
12 Correct 0 ms 2044 KB Output is correct
13 Correct 0 ms 2044 KB Output is correct
14 Correct 0 ms 2044 KB Output is correct
15 Correct 0 ms 2044 KB Output is correct
16 Correct 0 ms 2044 KB Output is correct
17 Correct 0 ms 2044 KB Output is correct
18 Correct 0 ms 2044 KB Output is correct
19 Correct 0 ms 2044 KB Output is correct
20 Correct 0 ms 2044 KB Output is correct
21 Correct 0 ms 2044 KB Output is correct
22 Correct 0 ms 2044 KB Output is correct
23 Correct 0 ms 2044 KB Output is correct
24 Correct 0 ms 2044 KB Output is correct
25 Correct 19 ms 2044 KB Output is correct
26 Correct 19 ms 2044 KB Output is correct
27 Correct 19 ms 2044 KB Output is correct
28 Correct 19 ms 2044 KB Output is correct
29 Correct 19 ms 2044 KB Output is correct
30 Correct 23 ms 2044 KB Output is correct
31 Correct 19 ms 2044 KB Output is correct
32 Correct 26 ms 2044 KB Output is correct
33 Correct 19 ms 2044 KB Output is correct
34 Correct 19 ms 2044 KB Output is correct
35 Correct 16 ms 2044 KB Output is correct
36 Correct 19 ms 2044 KB Output is correct
37 Correct 23 ms 2044 KB Output is correct
38 Correct 26 ms 2044 KB Output is correct
39 Correct 16 ms 2044 KB Output is correct
40 Correct 16 ms 2044 KB Output is correct
41 Correct 26 ms 2044 KB Output is correct
42 Correct 33 ms 2044 KB Output is correct
43 Correct 9 ms 2044 KB Output is correct
44 Correct 9 ms 2044 KB Output is correct
45 Runtime error 3 ms 2044 KB Execution killed because of forbidden syscall futex (202)
46 Halted 0 ms 0 KB -
# Verdict Execution time Memory Grader output
1 Correct 0 ms 2044 KB Output is correct
2 Correct 0 ms 2044 KB Output is correct
3 Correct 0 ms 2044 KB Output is correct
4 Correct 0 ms 2044 KB Output is correct
5 Correct 0 ms 2044 KB Output is correct
6 Correct 0 ms 2044 KB Output is correct
7 Correct 0 ms 2044 KB Output is correct
8 Correct 0 ms 2044 KB Output is correct
9 Correct 0 ms 2044 KB Output is correct
10 Correct 0 ms 2044 KB Output is correct
11 Correct 0 ms 2044 KB Output is correct
12 Correct 0 ms 2044 KB Output is correct
13 Correct 0 ms 2044 KB Output is correct
14 Correct 0 ms 2044 KB Output is correct
15 Correct 0 ms 2044 KB Output is correct
16 Correct 0 ms 2044 KB Output is correct
17 Correct 0 ms 2044 KB Output is correct
18 Correct 0 ms 2044 KB Output is correct
19 Correct 0 ms 2044 KB Output is correct
20 Correct 0 ms 2044 KB Output is correct
21 Correct 0 ms 2044 KB Output is correct
22 Correct 0 ms 2044 KB Output is correct
23 Correct 0 ms 2044 KB Output is correct
24 Correct 0 ms 2044 KB Output is correct
25 Correct 19 ms 2044 KB Output is correct
26 Correct 19 ms 2044 KB Output is correct
27 Correct 19 ms 2044 KB Output is correct
28 Correct 19 ms 2044 KB Output is correct
29 Correct 19 ms 2044 KB Output is correct
30 Correct 23 ms 2044 KB Output is correct
31 Correct 19 ms 2044 KB Output is correct
32 Correct 26 ms 2044 KB Output is correct
33 Correct 19 ms 2044 KB Output is correct
34 Correct 19 ms 2044 KB Output is correct
35 Correct 16 ms 2044 KB Output is correct
36 Correct 19 ms 2044 KB Output is correct
37 Correct 23 ms 2044 KB Output is correct
38 Correct 26 ms 2044 KB Output is correct
39 Correct 16 ms 2044 KB Output is correct
40 Correct 16 ms 2044 KB Output is correct
41 Correct 26 ms 2044 KB Output is correct
42 Correct 33 ms 2044 KB Output is correct
43 Correct 9 ms 2044 KB Output is correct
44 Correct 9 ms 2044 KB Output is correct
45 Runtime error 3 ms 2044 KB Execution killed because of forbidden syscall futex (202)
46 Halted 0 ms 0 KB -