#include <bits/stdc++.h>
#pragma gcc("O3, unroll-loops")
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define pb push_back
#define FIO ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
using namespace std;
typedef long long ll;
typedef pair <int, int> pii;
const int N = 1e6 + 7, ofs = (1 << 21), mod = 1e9 + 7;
int n, E;
int l[N], r[N], par[N], siz[N], bio[N], col[N];
pii t[2*ofs];
vector <int> no[N], adj[N];
void add(int x, int y) {
x += ofs;
t[x] = {y, y};
while (x /= 2) t[x] = {max(t[2*x].F, t[2*x+1].F), min(t[2*x].S, t[2*x+1].S)};
}
pii get(int x, int a, int b, int lo = 0, int hi = ofs-1) {
if (b < lo || hi < a) return {-1, n};
if (a <= lo && hi <= b) return t[x];
int mid = (lo + hi) / 2;
pii p1 = get(2*x, a, b, lo, mid), p2 = get(2*x+1, a, b, mid+1, hi);
return {max(p1.F, p2.F), min(p1.S, p2.S)};
}
int find(int x) {return (x == par[x]) ? x : (par[x] = find(par[x]));}
void unite(int x, int y) {
x = find(x); y = find(y);
if (x == y) return;
if (siz[x] < siz[y]) swap(x, y);
siz[x] += siz[y];
par[y] = x;
for (auto z : no[y]) {
add(r[z], x);
no[x].pb(z);
}
}
void dfs(int x) {
bio[x] = 1;
for (auto y : adj[x]) {
if (bio[y]) {
if (col[x] == col[y]) E = 1;
continue;
}
col[y] = col[x] ^ 1;
dfs(y);
}
}
int madd(int x, int y) {return (x+y < mod) ? (x+y) : (x+y-mod);}
int mul(int x, int y) {return (ll)x*y%mod;}
int main () {
FIO;
cin >> n;
for (int i = 0; i < 2*ofs; i++) t[i] = {-1, n};
vector <pii> v;
for (int i = 0; i < n; i++) {
cin >> l[i] >> r[i]; l[i]--; r[i]--;
par[i] = i;
siz[i] = 1;
v.pb({l[i], i});
no[i] = {i};
}
sort(all(v));
vector <pii> ed;
for (int i = 0; i < n; i++) {
int x = v[i].S;
pii o = get(1, l[x], r[x]);
if (o.F != -1 && o.F != o.S) {
while (o.F != o.S) {
unite(o.F, o.S);
o = get(1, l[x], r[x]);
}
}
if (o.F != -1) {
ed.pb({o.F, x});
}
add(r[x], x);
}
for (int i = 0; i < ed.size(); i++) {
int x = find(ed[i].F), y = find(ed[i].S);
adj[x].pb(y);
adj[y].pb(x);
}
int res = 1;
for (int i = 0; i < n; i++) {
int x = find(i);
if (bio[x]) continue;
res = mul(res, 2);
dfs(x);
}
cout << ((E) ? 0 : res);
return 0;
}
Compilation message
port_facility.cpp:3: warning: ignoring '#pragma gcc ' [-Wunknown-pragmas]
3 | #pragma gcc("O3, unroll-loops")
|
port_facility.cpp: In function 'int main()':
port_facility.cpp:97:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
97 | for (int i = 0; i < ed.size(); i++) {
| ~~^~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
19 ms |
80220 KB |
Output is correct |
2 |
Correct |
20 ms |
80208 KB |
Output is correct |
3 |
Correct |
20 ms |
80220 KB |
Output is correct |
4 |
Correct |
19 ms |
80096 KB |
Output is correct |
5 |
Correct |
19 ms |
80220 KB |
Output is correct |
6 |
Correct |
20 ms |
80220 KB |
Output is correct |
7 |
Correct |
18 ms |
80220 KB |
Output is correct |
8 |
Correct |
19 ms |
80100 KB |
Output is correct |
9 |
Correct |
18 ms |
80216 KB |
Output is correct |
10 |
Correct |
20 ms |
80216 KB |
Output is correct |
11 |
Correct |
19 ms |
80288 KB |
Output is correct |
12 |
Correct |
19 ms |
80216 KB |
Output is correct |
13 |
Correct |
19 ms |
80220 KB |
Output is correct |
14 |
Correct |
20 ms |
80208 KB |
Output is correct |
15 |
Correct |
19 ms |
80216 KB |
Output is correct |
16 |
Correct |
23 ms |
80220 KB |
Output is correct |
17 |
Correct |
22 ms |
80296 KB |
Output is correct |
18 |
Correct |
19 ms |
80220 KB |
Output is correct |
19 |
Correct |
19 ms |
80216 KB |
Output is correct |
20 |
Correct |
17 ms |
80220 KB |
Output is correct |
21 |
Correct |
20 ms |
80216 KB |
Output is correct |
22 |
Correct |
20 ms |
80216 KB |
Output is correct |
23 |
Correct |
19 ms |
80220 KB |
Output is correct |
24 |
Correct |
18 ms |
80120 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
19 ms |
80220 KB |
Output is correct |
2 |
Correct |
20 ms |
80208 KB |
Output is correct |
3 |
Correct |
20 ms |
80220 KB |
Output is correct |
4 |
Correct |
19 ms |
80096 KB |
Output is correct |
5 |
Correct |
19 ms |
80220 KB |
Output is correct |
6 |
Correct |
20 ms |
80220 KB |
Output is correct |
7 |
Correct |
18 ms |
80220 KB |
Output is correct |
8 |
Correct |
19 ms |
80100 KB |
Output is correct |
9 |
Correct |
18 ms |
80216 KB |
Output is correct |
10 |
Correct |
20 ms |
80216 KB |
Output is correct |
11 |
Correct |
19 ms |
80288 KB |
Output is correct |
12 |
Correct |
19 ms |
80216 KB |
Output is correct |
13 |
Correct |
19 ms |
80220 KB |
Output is correct |
14 |
Correct |
20 ms |
80208 KB |
Output is correct |
15 |
Correct |
19 ms |
80216 KB |
Output is correct |
16 |
Correct |
23 ms |
80220 KB |
Output is correct |
17 |
Correct |
22 ms |
80296 KB |
Output is correct |
18 |
Correct |
19 ms |
80220 KB |
Output is correct |
19 |
Correct |
19 ms |
80216 KB |
Output is correct |
20 |
Correct |
17 ms |
80220 KB |
Output is correct |
21 |
Correct |
20 ms |
80216 KB |
Output is correct |
22 |
Correct |
20 ms |
80216 KB |
Output is correct |
23 |
Correct |
19 ms |
80220 KB |
Output is correct |
24 |
Correct |
18 ms |
80120 KB |
Output is correct |
25 |
Correct |
20 ms |
80476 KB |
Output is correct |
26 |
Correct |
23 ms |
80248 KB |
Output is correct |
27 |
Correct |
22 ms |
80472 KB |
Output is correct |
28 |
Correct |
22 ms |
80476 KB |
Output is correct |
29 |
Correct |
21 ms |
80484 KB |
Output is correct |
30 |
Correct |
21 ms |
80476 KB |
Output is correct |
31 |
Correct |
21 ms |
80492 KB |
Output is correct |
32 |
Correct |
21 ms |
80472 KB |
Output is correct |
33 |
Correct |
18 ms |
80476 KB |
Output is correct |
34 |
Correct |
21 ms |
80472 KB |
Output is correct |
35 |
Correct |
19 ms |
80220 KB |
Output is correct |
36 |
Correct |
20 ms |
80216 KB |
Output is correct |
37 |
Correct |
27 ms |
80468 KB |
Output is correct |
38 |
Correct |
21 ms |
80720 KB |
Output is correct |
39 |
Correct |
19 ms |
80472 KB |
Output is correct |
40 |
Correct |
22 ms |
80236 KB |
Output is correct |
41 |
Correct |
20 ms |
80476 KB |
Output is correct |
42 |
Correct |
20 ms |
80476 KB |
Output is correct |
43 |
Correct |
20 ms |
80476 KB |
Output is correct |
44 |
Correct |
19 ms |
80476 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
19 ms |
80220 KB |
Output is correct |
2 |
Correct |
20 ms |
80208 KB |
Output is correct |
3 |
Correct |
20 ms |
80220 KB |
Output is correct |
4 |
Correct |
19 ms |
80096 KB |
Output is correct |
5 |
Correct |
19 ms |
80220 KB |
Output is correct |
6 |
Correct |
20 ms |
80220 KB |
Output is correct |
7 |
Correct |
18 ms |
80220 KB |
Output is correct |
8 |
Correct |
19 ms |
80100 KB |
Output is correct |
9 |
Correct |
18 ms |
80216 KB |
Output is correct |
10 |
Correct |
20 ms |
80216 KB |
Output is correct |
11 |
Correct |
19 ms |
80288 KB |
Output is correct |
12 |
Correct |
19 ms |
80216 KB |
Output is correct |
13 |
Correct |
19 ms |
80220 KB |
Output is correct |
14 |
Correct |
20 ms |
80208 KB |
Output is correct |
15 |
Correct |
19 ms |
80216 KB |
Output is correct |
16 |
Correct |
23 ms |
80220 KB |
Output is correct |
17 |
Correct |
22 ms |
80296 KB |
Output is correct |
18 |
Correct |
19 ms |
80220 KB |
Output is correct |
19 |
Correct |
19 ms |
80216 KB |
Output is correct |
20 |
Correct |
17 ms |
80220 KB |
Output is correct |
21 |
Correct |
20 ms |
80216 KB |
Output is correct |
22 |
Correct |
20 ms |
80216 KB |
Output is correct |
23 |
Correct |
19 ms |
80220 KB |
Output is correct |
24 |
Correct |
18 ms |
80120 KB |
Output is correct |
25 |
Correct |
20 ms |
80476 KB |
Output is correct |
26 |
Correct |
23 ms |
80248 KB |
Output is correct |
27 |
Correct |
22 ms |
80472 KB |
Output is correct |
28 |
Correct |
22 ms |
80476 KB |
Output is correct |
29 |
Correct |
21 ms |
80484 KB |
Output is correct |
30 |
Correct |
21 ms |
80476 KB |
Output is correct |
31 |
Correct |
21 ms |
80492 KB |
Output is correct |
32 |
Correct |
21 ms |
80472 KB |
Output is correct |
33 |
Correct |
18 ms |
80476 KB |
Output is correct |
34 |
Correct |
21 ms |
80472 KB |
Output is correct |
35 |
Correct |
19 ms |
80220 KB |
Output is correct |
36 |
Correct |
20 ms |
80216 KB |
Output is correct |
37 |
Correct |
27 ms |
80468 KB |
Output is correct |
38 |
Correct |
21 ms |
80720 KB |
Output is correct |
39 |
Correct |
19 ms |
80472 KB |
Output is correct |
40 |
Correct |
22 ms |
80236 KB |
Output is correct |
41 |
Correct |
20 ms |
80476 KB |
Output is correct |
42 |
Correct |
20 ms |
80476 KB |
Output is correct |
43 |
Correct |
20 ms |
80476 KB |
Output is correct |
44 |
Correct |
19 ms |
80476 KB |
Output is correct |
45 |
Correct |
97 ms |
89796 KB |
Output is correct |
46 |
Correct |
90 ms |
89796 KB |
Output is correct |
47 |
Correct |
100 ms |
89776 KB |
Output is correct |
48 |
Correct |
96 ms |
89800 KB |
Output is correct |
49 |
Correct |
106 ms |
89772 KB |
Output is correct |
50 |
Correct |
92 ms |
89764 KB |
Output is correct |
51 |
Correct |
90 ms |
89792 KB |
Output is correct |
52 |
Correct |
63 ms |
87288 KB |
Output is correct |
53 |
Correct |
68 ms |
87240 KB |
Output is correct |
54 |
Correct |
106 ms |
89788 KB |
Output is correct |
55 |
Correct |
109 ms |
89540 KB |
Output is correct |
56 |
Correct |
104 ms |
89540 KB |
Output is correct |
57 |
Correct |
70 ms |
91328 KB |
Output is correct |
58 |
Correct |
62 ms |
87296 KB |
Output is correct |
59 |
Correct |
71 ms |
88264 KB |
Output is correct |
60 |
Correct |
100 ms |
89548 KB |
Output is correct |
61 |
Correct |
85 ms |
89796 KB |
Output is correct |
62 |
Correct |
77 ms |
88772 KB |
Output is correct |
63 |
Correct |
81 ms |
89500 KB |
Output is correct |
64 |
Correct |
91 ms |
90052 KB |
Output is correct |
65 |
Correct |
111 ms |
90312 KB |
Output is correct |
66 |
Correct |
111 ms |
90568 KB |
Output is correct |
67 |
Correct |
93 ms |
90052 KB |
Output is correct |
68 |
Correct |
105 ms |
90084 KB |
Output is correct |
69 |
Correct |
92 ms |
91052 KB |
Output is correct |
70 |
Correct |
109 ms |
91036 KB |
Output is correct |
71 |
Correct |
90 ms |
90052 KB |
Output is correct |
72 |
Correct |
94 ms |
90108 KB |
Output is correct |
73 |
Correct |
88 ms |
90816 KB |
Output is correct |
74 |
Correct |
91 ms |
90820 KB |
Output is correct |
75 |
Correct |
77 ms |
94284 KB |
Output is correct |
76 |
Correct |
74 ms |
96324 KB |
Output is correct |
77 |
Correct |
74 ms |
96332 KB |
Output is correct |
78 |
Correct |
92 ms |
89796 KB |
Output is correct |
79 |
Correct |
88 ms |
89796 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
19 ms |
80220 KB |
Output is correct |
2 |
Correct |
20 ms |
80208 KB |
Output is correct |
3 |
Correct |
20 ms |
80220 KB |
Output is correct |
4 |
Correct |
19 ms |
80096 KB |
Output is correct |
5 |
Correct |
19 ms |
80220 KB |
Output is correct |
6 |
Correct |
20 ms |
80220 KB |
Output is correct |
7 |
Correct |
18 ms |
80220 KB |
Output is correct |
8 |
Correct |
19 ms |
80100 KB |
Output is correct |
9 |
Correct |
18 ms |
80216 KB |
Output is correct |
10 |
Correct |
20 ms |
80216 KB |
Output is correct |
11 |
Correct |
19 ms |
80288 KB |
Output is correct |
12 |
Correct |
19 ms |
80216 KB |
Output is correct |
13 |
Correct |
19 ms |
80220 KB |
Output is correct |
14 |
Correct |
20 ms |
80208 KB |
Output is correct |
15 |
Correct |
19 ms |
80216 KB |
Output is correct |
16 |
Correct |
23 ms |
80220 KB |
Output is correct |
17 |
Correct |
22 ms |
80296 KB |
Output is correct |
18 |
Correct |
19 ms |
80220 KB |
Output is correct |
19 |
Correct |
19 ms |
80216 KB |
Output is correct |
20 |
Correct |
17 ms |
80220 KB |
Output is correct |
21 |
Correct |
20 ms |
80216 KB |
Output is correct |
22 |
Correct |
20 ms |
80216 KB |
Output is correct |
23 |
Correct |
19 ms |
80220 KB |
Output is correct |
24 |
Correct |
18 ms |
80120 KB |
Output is correct |
25 |
Correct |
20 ms |
80476 KB |
Output is correct |
26 |
Correct |
23 ms |
80248 KB |
Output is correct |
27 |
Correct |
22 ms |
80472 KB |
Output is correct |
28 |
Correct |
22 ms |
80476 KB |
Output is correct |
29 |
Correct |
21 ms |
80484 KB |
Output is correct |
30 |
Correct |
21 ms |
80476 KB |
Output is correct |
31 |
Correct |
21 ms |
80492 KB |
Output is correct |
32 |
Correct |
21 ms |
80472 KB |
Output is correct |
33 |
Correct |
18 ms |
80476 KB |
Output is correct |
34 |
Correct |
21 ms |
80472 KB |
Output is correct |
35 |
Correct |
19 ms |
80220 KB |
Output is correct |
36 |
Correct |
20 ms |
80216 KB |
Output is correct |
37 |
Correct |
27 ms |
80468 KB |
Output is correct |
38 |
Correct |
21 ms |
80720 KB |
Output is correct |
39 |
Correct |
19 ms |
80472 KB |
Output is correct |
40 |
Correct |
22 ms |
80236 KB |
Output is correct |
41 |
Correct |
20 ms |
80476 KB |
Output is correct |
42 |
Correct |
20 ms |
80476 KB |
Output is correct |
43 |
Correct |
20 ms |
80476 KB |
Output is correct |
44 |
Correct |
19 ms |
80476 KB |
Output is correct |
45 |
Correct |
97 ms |
89796 KB |
Output is correct |
46 |
Correct |
90 ms |
89796 KB |
Output is correct |
47 |
Correct |
100 ms |
89776 KB |
Output is correct |
48 |
Correct |
96 ms |
89800 KB |
Output is correct |
49 |
Correct |
106 ms |
89772 KB |
Output is correct |
50 |
Correct |
92 ms |
89764 KB |
Output is correct |
51 |
Correct |
90 ms |
89792 KB |
Output is correct |
52 |
Correct |
63 ms |
87288 KB |
Output is correct |
53 |
Correct |
68 ms |
87240 KB |
Output is correct |
54 |
Correct |
106 ms |
89788 KB |
Output is correct |
55 |
Correct |
109 ms |
89540 KB |
Output is correct |
56 |
Correct |
104 ms |
89540 KB |
Output is correct |
57 |
Correct |
70 ms |
91328 KB |
Output is correct |
58 |
Correct |
62 ms |
87296 KB |
Output is correct |
59 |
Correct |
71 ms |
88264 KB |
Output is correct |
60 |
Correct |
100 ms |
89548 KB |
Output is correct |
61 |
Correct |
85 ms |
89796 KB |
Output is correct |
62 |
Correct |
77 ms |
88772 KB |
Output is correct |
63 |
Correct |
81 ms |
89500 KB |
Output is correct |
64 |
Correct |
91 ms |
90052 KB |
Output is correct |
65 |
Correct |
111 ms |
90312 KB |
Output is correct |
66 |
Correct |
111 ms |
90568 KB |
Output is correct |
67 |
Correct |
93 ms |
90052 KB |
Output is correct |
68 |
Correct |
105 ms |
90084 KB |
Output is correct |
69 |
Correct |
92 ms |
91052 KB |
Output is correct |
70 |
Correct |
109 ms |
91036 KB |
Output is correct |
71 |
Correct |
90 ms |
90052 KB |
Output is correct |
72 |
Correct |
94 ms |
90108 KB |
Output is correct |
73 |
Correct |
88 ms |
90816 KB |
Output is correct |
74 |
Correct |
91 ms |
90820 KB |
Output is correct |
75 |
Correct |
77 ms |
94284 KB |
Output is correct |
76 |
Correct |
74 ms |
96324 KB |
Output is correct |
77 |
Correct |
74 ms |
96332 KB |
Output is correct |
78 |
Correct |
92 ms |
89796 KB |
Output is correct |
79 |
Correct |
88 ms |
89796 KB |
Output is correct |
80 |
Correct |
930 ms |
178092 KB |
Output is correct |
81 |
Correct |
914 ms |
178376 KB |
Output is correct |
82 |
Correct |
927 ms |
178752 KB |
Output is correct |
83 |
Correct |
930 ms |
178236 KB |
Output is correct |
84 |
Correct |
939 ms |
178092 KB |
Output is correct |
85 |
Correct |
960 ms |
178092 KB |
Output is correct |
86 |
Correct |
972 ms |
178332 KB |
Output is correct |
87 |
Correct |
452 ms |
153456 KB |
Output is correct |
88 |
Correct |
581 ms |
153508 KB |
Output is correct |
89 |
Correct |
1233 ms |
178676 KB |
Output is correct |
90 |
Correct |
1217 ms |
173496 KB |
Output is correct |
91 |
Correct |
1229 ms |
173484 KB |
Output is correct |
92 |
Correct |
654 ms |
192452 KB |
Output is correct |
93 |
Correct |
469 ms |
153512 KB |
Output is correct |
94 |
Correct |
664 ms |
169896 KB |
Output is correct |
95 |
Correct |
899 ms |
178080 KB |
Output is correct |
96 |
Correct |
927 ms |
179116 KB |
Output is correct |
97 |
Correct |
726 ms |
170704 KB |
Output is correct |
98 |
Correct |
898 ms |
178124 KB |
Output is correct |
99 |
Correct |
969 ms |
177372 KB |
Output is correct |
100 |
Correct |
1518 ms |
177944 KB |
Output is correct |
101 |
Correct |
1439 ms |
178856 KB |
Output is correct |
102 |
Correct |
872 ms |
180908 KB |
Output is correct |
103 |
Correct |
887 ms |
180892 KB |
Output is correct |
104 |
Correct |
857 ms |
187308 KB |
Output is correct |
105 |
Correct |
846 ms |
187560 KB |
Output is correct |
106 |
Correct |
866 ms |
180828 KB |
Output is correct |
107 |
Correct |
841 ms |
180908 KB |
Output is correct |
108 |
Correct |
864 ms |
187300 KB |
Output is correct |
109 |
Correct |
835 ms |
187288 KB |
Output is correct |
110 |
Correct |
794 ms |
242460 KB |
Output is correct |
111 |
Correct |
731 ms |
243468 KB |
Output is correct |
112 |
Correct |
728 ms |
243472 KB |
Output is correct |
113 |
Correct |
977 ms |
178536 KB |
Output is correct |
114 |
Correct |
965 ms |
178508 KB |
Output is correct |