#include <bits/stdc++.h>
using namespace std;
typedef pair<int, int> ii;
typedef pair<int, bool> p;
const int N = 1000005;
const int MOD = 1e9 + 7;
int n, cnt, c[N];
int it[8 * N];
int prv[25 * N];
p val[25 * N];
vector<ii> a;
vector<p> G[N];
void NO() {
cout << 0 << '\n'; exit(0);
}
void addEdge(int u, int v, bool w) {
G[u].push_back(p(v, w)), G[v].push_back(p(u, w));
}
void upd(int i, int l, int r, int x, int id) {
++cnt, prv[cnt] = it[i], val[cnt] = p(id, 0), it[i] = cnt;
if (l == r) return;
int mid = (l + r) >> 1;
if (mid >= x) upd(i << 1, l, mid, x, id);
else upd(i << 1 | 1, mid + 1, r, x, id);
}
void get(int i, int l, int r, int u, int v, int id) {
if (l > v || u > r) return;
if (u <= l && r <= v) {
if (!it[i]) return;
int cur = it[i];
while (cur) {
addEdge(id, val[cur].first, val[cur].second ^ 1), cur = prv[cur];
}
val[it[i]] = ii(id, 1), prv[it[i]] = 0;
return;
}
int mid = (l + r) >> 1;
get(i << 1, l, mid, u, v, id);
get(i << 1 | 1, mid + 1, r, u, v, id);
}
void dfs(int u) {
for (auto v : G[u]) {
if (c[v.first] != -1 && (c[u] ^ v.second) != c[v.first]) NO();
if (c[v.first] != -1) continue;
c[v.first] = c[u] ^ v.second, dfs(v.first);
}
}
int main() {
scanf("%d", &n);
for (int i = 0; i < n; ++i) {
int x, y;
scanf("%d %d", &x, &y);
a.push_back(ii(x, y));
}
sort(a.begin(), a.end());
for (int i = 0; i < n; ++i) {
get(1, 1, 2 * n, a[i].first, a[i].second, i);
upd(1, 1, 2 * n, a[i].second, i);
}
memset(c, -1, sizeof(c));
int num = 0;
for (int i = 0; i < n; ++i) {
if (c[i] != -1) continue;
c[i] = 1, dfs(i), num++;
}
int res = 1;
for (int i = 0; i < num; ++i) res = 1LL * res * 2 % MOD;
cout << res << '\n';
}
Compilation message
port_facility.cpp: In function 'int main()':
port_facility.cpp:57:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &n);
^
port_facility.cpp:60:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &x, &y);
^
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
9 ms |
353588 KB |
Output is correct |
2 |
Correct |
10 ms |
353588 KB |
Output is correct |
3 |
Correct |
6 ms |
353588 KB |
Output is correct |
4 |
Correct |
3 ms |
353588 KB |
Output is correct |
5 |
Correct |
4 ms |
353588 KB |
Output is correct |
6 |
Correct |
12 ms |
353588 KB |
Output is correct |
7 |
Correct |
13 ms |
353588 KB |
Output is correct |
8 |
Correct |
6 ms |
353588 KB |
Output is correct |
9 |
Correct |
3 ms |
353588 KB |
Output is correct |
10 |
Correct |
6 ms |
353588 KB |
Output is correct |
11 |
Correct |
3 ms |
353588 KB |
Output is correct |
12 |
Correct |
6 ms |
353588 KB |
Output is correct |
13 |
Correct |
5 ms |
353588 KB |
Output is correct |
14 |
Correct |
6 ms |
353588 KB |
Output is correct |
15 |
Correct |
14 ms |
353588 KB |
Output is correct |
16 |
Correct |
7 ms |
353588 KB |
Output is correct |
17 |
Correct |
10 ms |
353588 KB |
Output is correct |
18 |
Correct |
7 ms |
353588 KB |
Output is correct |
19 |
Correct |
6 ms |
353588 KB |
Output is correct |
20 |
Correct |
12 ms |
353588 KB |
Output is correct |
21 |
Correct |
7 ms |
353588 KB |
Output is correct |
22 |
Correct |
10 ms |
353588 KB |
Output is correct |
23 |
Correct |
6 ms |
353588 KB |
Output is correct |
24 |
Correct |
13 ms |
353588 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
9 ms |
353588 KB |
Output is correct |
2 |
Correct |
10 ms |
353588 KB |
Output is correct |
3 |
Correct |
6 ms |
353588 KB |
Output is correct |
4 |
Correct |
3 ms |
353588 KB |
Output is correct |
5 |
Correct |
4 ms |
353588 KB |
Output is correct |
6 |
Correct |
12 ms |
353588 KB |
Output is correct |
7 |
Correct |
13 ms |
353588 KB |
Output is correct |
8 |
Correct |
6 ms |
353588 KB |
Output is correct |
9 |
Correct |
3 ms |
353588 KB |
Output is correct |
10 |
Correct |
6 ms |
353588 KB |
Output is correct |
11 |
Correct |
3 ms |
353588 KB |
Output is correct |
12 |
Correct |
6 ms |
353588 KB |
Output is correct |
13 |
Correct |
5 ms |
353588 KB |
Output is correct |
14 |
Correct |
6 ms |
353588 KB |
Output is correct |
15 |
Correct |
14 ms |
353588 KB |
Output is correct |
16 |
Correct |
7 ms |
353588 KB |
Output is correct |
17 |
Correct |
10 ms |
353588 KB |
Output is correct |
18 |
Correct |
7 ms |
353588 KB |
Output is correct |
19 |
Correct |
6 ms |
353588 KB |
Output is correct |
20 |
Correct |
12 ms |
353588 KB |
Output is correct |
21 |
Correct |
7 ms |
353588 KB |
Output is correct |
22 |
Correct |
10 ms |
353588 KB |
Output is correct |
23 |
Correct |
6 ms |
353588 KB |
Output is correct |
24 |
Correct |
13 ms |
353588 KB |
Output is correct |
25 |
Correct |
9 ms |
353720 KB |
Output is correct |
26 |
Correct |
8 ms |
353720 KB |
Output is correct |
27 |
Correct |
12 ms |
353720 KB |
Output is correct |
28 |
Correct |
13 ms |
353720 KB |
Output is correct |
29 |
Correct |
7 ms |
353720 KB |
Output is correct |
30 |
Correct |
9 ms |
353720 KB |
Output is correct |
31 |
Correct |
8 ms |
353720 KB |
Output is correct |
32 |
Correct |
8 ms |
353720 KB |
Output is correct |
33 |
Correct |
11 ms |
353720 KB |
Output is correct |
34 |
Correct |
3 ms |
353720 KB |
Output is correct |
35 |
Correct |
7 ms |
353588 KB |
Output is correct |
36 |
Correct |
10 ms |
353588 KB |
Output is correct |
37 |
Correct |
6 ms |
354116 KB |
Output is correct |
38 |
Correct |
6 ms |
354120 KB |
Output is correct |
39 |
Correct |
6 ms |
353720 KB |
Output is correct |
40 |
Correct |
15 ms |
353588 KB |
Output is correct |
41 |
Correct |
12 ms |
353720 KB |
Output is correct |
42 |
Correct |
7 ms |
353720 KB |
Output is correct |
43 |
Correct |
10 ms |
353720 KB |
Output is correct |
44 |
Correct |
3 ms |
353720 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
9 ms |
353588 KB |
Output is correct |
2 |
Correct |
10 ms |
353588 KB |
Output is correct |
3 |
Correct |
6 ms |
353588 KB |
Output is correct |
4 |
Correct |
3 ms |
353588 KB |
Output is correct |
5 |
Correct |
4 ms |
353588 KB |
Output is correct |
6 |
Correct |
12 ms |
353588 KB |
Output is correct |
7 |
Correct |
13 ms |
353588 KB |
Output is correct |
8 |
Correct |
6 ms |
353588 KB |
Output is correct |
9 |
Correct |
3 ms |
353588 KB |
Output is correct |
10 |
Correct |
6 ms |
353588 KB |
Output is correct |
11 |
Correct |
3 ms |
353588 KB |
Output is correct |
12 |
Correct |
6 ms |
353588 KB |
Output is correct |
13 |
Correct |
5 ms |
353588 KB |
Output is correct |
14 |
Correct |
6 ms |
353588 KB |
Output is correct |
15 |
Correct |
14 ms |
353588 KB |
Output is correct |
16 |
Correct |
7 ms |
353588 KB |
Output is correct |
17 |
Correct |
10 ms |
353588 KB |
Output is correct |
18 |
Correct |
7 ms |
353588 KB |
Output is correct |
19 |
Correct |
6 ms |
353588 KB |
Output is correct |
20 |
Correct |
12 ms |
353588 KB |
Output is correct |
21 |
Correct |
7 ms |
353588 KB |
Output is correct |
22 |
Correct |
10 ms |
353588 KB |
Output is correct |
23 |
Correct |
6 ms |
353588 KB |
Output is correct |
24 |
Correct |
13 ms |
353588 KB |
Output is correct |
25 |
Correct |
9 ms |
353720 KB |
Output is correct |
26 |
Correct |
8 ms |
353720 KB |
Output is correct |
27 |
Correct |
12 ms |
353720 KB |
Output is correct |
28 |
Correct |
13 ms |
353720 KB |
Output is correct |
29 |
Correct |
7 ms |
353720 KB |
Output is correct |
30 |
Correct |
9 ms |
353720 KB |
Output is correct |
31 |
Correct |
8 ms |
353720 KB |
Output is correct |
32 |
Correct |
8 ms |
353720 KB |
Output is correct |
33 |
Correct |
11 ms |
353720 KB |
Output is correct |
34 |
Correct |
3 ms |
353720 KB |
Output is correct |
35 |
Correct |
7 ms |
353588 KB |
Output is correct |
36 |
Correct |
10 ms |
353588 KB |
Output is correct |
37 |
Correct |
6 ms |
354116 KB |
Output is correct |
38 |
Correct |
6 ms |
354120 KB |
Output is correct |
39 |
Correct |
6 ms |
353720 KB |
Output is correct |
40 |
Correct |
15 ms |
353588 KB |
Output is correct |
41 |
Correct |
12 ms |
353720 KB |
Output is correct |
42 |
Correct |
7 ms |
353720 KB |
Output is correct |
43 |
Correct |
10 ms |
353720 KB |
Output is correct |
44 |
Correct |
3 ms |
353720 KB |
Output is correct |
45 |
Correct |
111 ms |
360680 KB |
Output is correct |
46 |
Correct |
111 ms |
361812 KB |
Output is correct |
47 |
Correct |
113 ms |
360104 KB |
Output is correct |
48 |
Correct |
123 ms |
361812 KB |
Output is correct |
49 |
Correct |
94 ms |
360500 KB |
Output is correct |
50 |
Correct |
103 ms |
361564 KB |
Output is correct |
51 |
Correct |
103 ms |
361696 KB |
Output is correct |
52 |
Correct |
65 ms |
355208 KB |
Output is correct |
53 |
Correct |
68 ms |
355208 KB |
Output is correct |
54 |
Correct |
195 ms |
389972 KB |
Output is correct |
55 |
Correct |
178 ms |
388568 KB |
Output is correct |
56 |
Correct |
178 ms |
388636 KB |
Output is correct |
57 |
Correct |
81 ms |
357728 KB |
Output is correct |
58 |
Correct |
70 ms |
355208 KB |
Output is correct |
59 |
Correct |
90 ms |
355208 KB |
Output is correct |
60 |
Correct |
96 ms |
356672 KB |
Output is correct |
61 |
Correct |
95 ms |
357992 KB |
Output is correct |
62 |
Correct |
78 ms |
356836 KB |
Output is correct |
63 |
Correct |
86 ms |
357412 KB |
Output is correct |
64 |
Correct |
110 ms |
358456 KB |
Output is correct |
65 |
Correct |
381 ms |
406236 KB |
Output is correct |
66 |
Correct |
417 ms |
406032 KB |
Output is correct |
67 |
Correct |
151 ms |
373556 KB |
Output is correct |
68 |
Correct |
132 ms |
373428 KB |
Output is correct |
69 |
Correct |
145 ms |
374268 KB |
Output is correct |
70 |
Correct |
161 ms |
374260 KB |
Output is correct |
71 |
Correct |
95 ms |
360156 KB |
Output is correct |
72 |
Correct |
98 ms |
360152 KB |
Output is correct |
73 |
Correct |
90 ms |
361904 KB |
Output is correct |
74 |
Correct |
102 ms |
361904 KB |
Output is correct |
75 |
Correct |
67 ms |
360724 KB |
Output is correct |
76 |
Correct |
107 ms |
360728 KB |
Output is correct |
77 |
Correct |
87 ms |
360728 KB |
Output is correct |
78 |
Correct |
116 ms |
361604 KB |
Output is correct |
79 |
Correct |
124 ms |
360800 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
9 ms |
353588 KB |
Output is correct |
2 |
Correct |
10 ms |
353588 KB |
Output is correct |
3 |
Correct |
6 ms |
353588 KB |
Output is correct |
4 |
Correct |
3 ms |
353588 KB |
Output is correct |
5 |
Correct |
4 ms |
353588 KB |
Output is correct |
6 |
Correct |
12 ms |
353588 KB |
Output is correct |
7 |
Correct |
13 ms |
353588 KB |
Output is correct |
8 |
Correct |
6 ms |
353588 KB |
Output is correct |
9 |
Correct |
3 ms |
353588 KB |
Output is correct |
10 |
Correct |
6 ms |
353588 KB |
Output is correct |
11 |
Correct |
3 ms |
353588 KB |
Output is correct |
12 |
Correct |
6 ms |
353588 KB |
Output is correct |
13 |
Correct |
5 ms |
353588 KB |
Output is correct |
14 |
Correct |
6 ms |
353588 KB |
Output is correct |
15 |
Correct |
14 ms |
353588 KB |
Output is correct |
16 |
Correct |
7 ms |
353588 KB |
Output is correct |
17 |
Correct |
10 ms |
353588 KB |
Output is correct |
18 |
Correct |
7 ms |
353588 KB |
Output is correct |
19 |
Correct |
6 ms |
353588 KB |
Output is correct |
20 |
Correct |
12 ms |
353588 KB |
Output is correct |
21 |
Correct |
7 ms |
353588 KB |
Output is correct |
22 |
Correct |
10 ms |
353588 KB |
Output is correct |
23 |
Correct |
6 ms |
353588 KB |
Output is correct |
24 |
Correct |
13 ms |
353588 KB |
Output is correct |
25 |
Correct |
9 ms |
353720 KB |
Output is correct |
26 |
Correct |
8 ms |
353720 KB |
Output is correct |
27 |
Correct |
12 ms |
353720 KB |
Output is correct |
28 |
Correct |
13 ms |
353720 KB |
Output is correct |
29 |
Correct |
7 ms |
353720 KB |
Output is correct |
30 |
Correct |
9 ms |
353720 KB |
Output is correct |
31 |
Correct |
8 ms |
353720 KB |
Output is correct |
32 |
Correct |
8 ms |
353720 KB |
Output is correct |
33 |
Correct |
11 ms |
353720 KB |
Output is correct |
34 |
Correct |
3 ms |
353720 KB |
Output is correct |
35 |
Correct |
7 ms |
353588 KB |
Output is correct |
36 |
Correct |
10 ms |
353588 KB |
Output is correct |
37 |
Correct |
6 ms |
354116 KB |
Output is correct |
38 |
Correct |
6 ms |
354120 KB |
Output is correct |
39 |
Correct |
6 ms |
353720 KB |
Output is correct |
40 |
Correct |
15 ms |
353588 KB |
Output is correct |
41 |
Correct |
12 ms |
353720 KB |
Output is correct |
42 |
Correct |
7 ms |
353720 KB |
Output is correct |
43 |
Correct |
10 ms |
353720 KB |
Output is correct |
44 |
Correct |
3 ms |
353720 KB |
Output is correct |
45 |
Correct |
111 ms |
360680 KB |
Output is correct |
46 |
Correct |
111 ms |
361812 KB |
Output is correct |
47 |
Correct |
113 ms |
360104 KB |
Output is correct |
48 |
Correct |
123 ms |
361812 KB |
Output is correct |
49 |
Correct |
94 ms |
360500 KB |
Output is correct |
50 |
Correct |
103 ms |
361564 KB |
Output is correct |
51 |
Correct |
103 ms |
361696 KB |
Output is correct |
52 |
Correct |
65 ms |
355208 KB |
Output is correct |
53 |
Correct |
68 ms |
355208 KB |
Output is correct |
54 |
Correct |
195 ms |
389972 KB |
Output is correct |
55 |
Correct |
178 ms |
388568 KB |
Output is correct |
56 |
Correct |
178 ms |
388636 KB |
Output is correct |
57 |
Correct |
81 ms |
357728 KB |
Output is correct |
58 |
Correct |
70 ms |
355208 KB |
Output is correct |
59 |
Correct |
90 ms |
355208 KB |
Output is correct |
60 |
Correct |
96 ms |
356672 KB |
Output is correct |
61 |
Correct |
95 ms |
357992 KB |
Output is correct |
62 |
Correct |
78 ms |
356836 KB |
Output is correct |
63 |
Correct |
86 ms |
357412 KB |
Output is correct |
64 |
Correct |
110 ms |
358456 KB |
Output is correct |
65 |
Correct |
381 ms |
406236 KB |
Output is correct |
66 |
Correct |
417 ms |
406032 KB |
Output is correct |
67 |
Correct |
151 ms |
373556 KB |
Output is correct |
68 |
Correct |
132 ms |
373428 KB |
Output is correct |
69 |
Correct |
145 ms |
374268 KB |
Output is correct |
70 |
Correct |
161 ms |
374260 KB |
Output is correct |
71 |
Correct |
95 ms |
360156 KB |
Output is correct |
72 |
Correct |
98 ms |
360152 KB |
Output is correct |
73 |
Correct |
90 ms |
361904 KB |
Output is correct |
74 |
Correct |
102 ms |
361904 KB |
Output is correct |
75 |
Correct |
67 ms |
360724 KB |
Output is correct |
76 |
Correct |
107 ms |
360728 KB |
Output is correct |
77 |
Correct |
87 ms |
360728 KB |
Output is correct |
78 |
Correct |
116 ms |
361604 KB |
Output is correct |
79 |
Correct |
124 ms |
360800 KB |
Output is correct |
80 |
Correct |
1164 ms |
431000 KB |
Output is correct |
81 |
Correct |
1136 ms |
429280 KB |
Output is correct |
82 |
Correct |
1140 ms |
418344 KB |
Output is correct |
83 |
Correct |
1282 ms |
429816 KB |
Output is correct |
84 |
Correct |
1168 ms |
431008 KB |
Output is correct |
85 |
Correct |
1105 ms |
426096 KB |
Output is correct |
86 |
Correct |
1183 ms |
433124 KB |
Output is correct |
87 |
Correct |
694 ms |
365960 KB |
Output is correct |
88 |
Correct |
831 ms |
365960 KB |
Output is correct |
89 |
Correct |
2139 ms |
781400 KB |
Output is correct |
90 |
Correct |
2064 ms |
764908 KB |
Output is correct |
91 |
Correct |
2137 ms |
734204 KB |
Output is correct |
92 |
Correct |
731 ms |
393012 KB |
Output is correct |
93 |
Correct |
645 ms |
365960 KB |
Output is correct |
94 |
Correct |
895 ms |
373476 KB |
Output is correct |
95 |
Correct |
965 ms |
391824 KB |
Output is correct |
96 |
Correct |
1025 ms |
407004 KB |
Output is correct |
97 |
Correct |
858 ms |
381924 KB |
Output is correct |
98 |
Correct |
1042 ms |
396304 KB |
Output is correct |
99 |
Correct |
1012 ms |
417628 KB |
Output is correct |
100 |
Execution timed out |
6000 ms |
946680 KB |
Execution timed out |
101 |
Halted |
0 ms |
0 KB |
- |