#include<bits/stdc++.h>
using namespace std;
using ll = long long;
const int MOD = 1e9 + 7;
const int INF = 1e9;
const int M = (1 << 21);
int n;
vector<int> mn_ver;
vector<int> mx_ver;
vector<pair<int, int>> segs;
int mn(int x, int y) {
return (segs[x].first < segs[y].first ? x : y);
}
int mx(int x, int y) {
return (segs[x].second > segs[y].second ? x : y);
}
void add(int ver) {
int pos = segs[ver].second;
for(pos += M, mn_ver[pos] = ver; pos > 1; pos >>= 1)
mn_ver[pos >> 1] = mn(mn_ver[pos], mn_ver[pos ^ 1]);
pos = segs[ver].first;
for(pos += M, mx_ver[pos] = ver; pos > 1; pos >>= 1)
mx_ver[pos >> 1] = mx(mx_ver[pos], mx_ver[pos ^ 1]);
}
void del(int ver) {
int pos = segs[ver].second;
for(pos += M, mn_ver[pos] = n; pos > 1; pos >>= 1)
mn_ver[pos >> 1] = mn(mn_ver[pos], mn_ver[pos ^ 1]);
pos = segs[ver].first;
for(pos += M, mx_ver[pos] = n; pos > 1; pos >>= 1)
mx_ver[pos >> 1] = mx(mx_ver[pos], mx_ver[pos ^ 1]);
}
int get1(int i) {
int ql = segs[i].first + 1, qr = segs[i].second - 1;
int res_ver = n;
for(ql += M, qr += M + 1; ql < qr; ql >>= 1, qr >>= 1) {
if(ql & 1) {
res_ver = mn(res_ver, mn_ver[ql++]);
}
if(qr & 1) {
res_ver = mn(res_ver, mn_ver[--qr]);
}
}
return res_ver;
}
int get2(int i) {
int ql = segs[i].first + 1, qr = segs[i].second - 1;
int res_ver = n;
for(ql += M, qr += M + 1; ql < qr; ql >>= 1, qr >>= 1) {
if(ql & 1) {
res_ver = mx(res_ver, mx_ver[ql++]);
}
if(qr & 1) {
res_ver = mx(res_ver, mx_ver[--qr]);
}
}
return res_ver;
}
int cl[M];
void dfs(int cur, int color) {
cl[cur] = color;
del(cur);
int next = get1(cur);
while(segs[next].first < segs[cur].first) {
dfs(next, 3 - color);
next = get1(cur);
}
next = get2(cur);
while(segs[next].second > segs[cur].second) {
dfs(next, 3 - color);
next = get2(cur);
}
}
int main() {
ios::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
cin >> n;
mn_ver.assign(2 * M, n);
mx_ver.assign(2 * M, n);
segs.resize(n + 1);
segs[n] = {INF, -INF};
for(int i = 0; i < n; i++) {
cin >> segs[i].first >> segs[i].second;
add(i);
}
int ans = 1;
for(int i = 0; i < n; i++) {
if(cl[i]) continue;
dfs(i, 1);
ans = (ans * 2) % MOD;
}
vector<int> t[2];
for(int i = 0; i < n; i++) {
t[cl[i] - 1].push_back(i);
}
sort(t[0].begin(), t[0].end(), [&](int x, int y) {
if(segs[x].second != segs[y].second) return segs[x].second < segs[y].second;
return segs[x].first > segs[y].first;
});
sort(t[1].begin(), t[1].end(), [&](int x, int y) {
if(segs[x].second != segs[y].second) return segs[x].second < segs[y].second;
return segs[x].first > segs[y].first;
});
for(int c : t[0]) {
add(c);
int v = get1(c);
if(segs[v].first < segs[c].first) {
cout << 0;
return 0;
}
}
for(int c : t[0]) del(c);
for(int c : t[1]) {
add(c);
int v = get1(c);
if(segs[v].first < segs[c].first) {
cout << 0;
return 0;
}
}
cout << ans;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
15 ms |
33108 KB |
Output is correct |
2 |
Correct |
14 ms |
33080 KB |
Output is correct |
3 |
Correct |
14 ms |
33140 KB |
Output is correct |
4 |
Correct |
14 ms |
33100 KB |
Output is correct |
5 |
Correct |
14 ms |
33160 KB |
Output is correct |
6 |
Correct |
15 ms |
33096 KB |
Output is correct |
7 |
Correct |
16 ms |
33060 KB |
Output is correct |
8 |
Correct |
15 ms |
33108 KB |
Output is correct |
9 |
Correct |
15 ms |
33096 KB |
Output is correct |
10 |
Correct |
14 ms |
33112 KB |
Output is correct |
11 |
Correct |
14 ms |
33128 KB |
Output is correct |
12 |
Correct |
14 ms |
33148 KB |
Output is correct |
13 |
Correct |
14 ms |
33084 KB |
Output is correct |
14 |
Correct |
14 ms |
33108 KB |
Output is correct |
15 |
Correct |
14 ms |
33108 KB |
Output is correct |
16 |
Correct |
15 ms |
33132 KB |
Output is correct |
17 |
Correct |
15 ms |
33108 KB |
Output is correct |
18 |
Correct |
14 ms |
33064 KB |
Output is correct |
19 |
Correct |
14 ms |
33148 KB |
Output is correct |
20 |
Correct |
14 ms |
33092 KB |
Output is correct |
21 |
Correct |
15 ms |
33108 KB |
Output is correct |
22 |
Correct |
14 ms |
33096 KB |
Output is correct |
23 |
Correct |
14 ms |
33148 KB |
Output is correct |
24 |
Correct |
14 ms |
33116 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
15 ms |
33108 KB |
Output is correct |
2 |
Correct |
14 ms |
33080 KB |
Output is correct |
3 |
Correct |
14 ms |
33140 KB |
Output is correct |
4 |
Correct |
14 ms |
33100 KB |
Output is correct |
5 |
Correct |
14 ms |
33160 KB |
Output is correct |
6 |
Correct |
15 ms |
33096 KB |
Output is correct |
7 |
Correct |
16 ms |
33060 KB |
Output is correct |
8 |
Correct |
15 ms |
33108 KB |
Output is correct |
9 |
Correct |
15 ms |
33096 KB |
Output is correct |
10 |
Correct |
14 ms |
33112 KB |
Output is correct |
11 |
Correct |
14 ms |
33128 KB |
Output is correct |
12 |
Correct |
14 ms |
33148 KB |
Output is correct |
13 |
Correct |
14 ms |
33084 KB |
Output is correct |
14 |
Correct |
14 ms |
33108 KB |
Output is correct |
15 |
Correct |
14 ms |
33108 KB |
Output is correct |
16 |
Correct |
15 ms |
33132 KB |
Output is correct |
17 |
Correct |
15 ms |
33108 KB |
Output is correct |
18 |
Correct |
14 ms |
33064 KB |
Output is correct |
19 |
Correct |
14 ms |
33148 KB |
Output is correct |
20 |
Correct |
14 ms |
33092 KB |
Output is correct |
21 |
Correct |
15 ms |
33108 KB |
Output is correct |
22 |
Correct |
14 ms |
33096 KB |
Output is correct |
23 |
Correct |
14 ms |
33148 KB |
Output is correct |
24 |
Correct |
14 ms |
33116 KB |
Output is correct |
25 |
Correct |
15 ms |
33212 KB |
Output is correct |
26 |
Correct |
15 ms |
33328 KB |
Output is correct |
27 |
Correct |
15 ms |
33236 KB |
Output is correct |
28 |
Correct |
17 ms |
33216 KB |
Output is correct |
29 |
Correct |
15 ms |
33236 KB |
Output is correct |
30 |
Correct |
15 ms |
33236 KB |
Output is correct |
31 |
Correct |
16 ms |
33240 KB |
Output is correct |
32 |
Correct |
17 ms |
33236 KB |
Output is correct |
33 |
Correct |
15 ms |
33280 KB |
Output is correct |
34 |
Correct |
16 ms |
33204 KB |
Output is correct |
35 |
Correct |
15 ms |
33160 KB |
Output is correct |
36 |
Correct |
15 ms |
33236 KB |
Output is correct |
37 |
Correct |
15 ms |
33376 KB |
Output is correct |
38 |
Correct |
14 ms |
33256 KB |
Output is correct |
39 |
Correct |
15 ms |
33232 KB |
Output is correct |
40 |
Correct |
15 ms |
33108 KB |
Output is correct |
41 |
Correct |
16 ms |
33364 KB |
Output is correct |
42 |
Correct |
15 ms |
33364 KB |
Output is correct |
43 |
Correct |
15 ms |
33280 KB |
Output is correct |
44 |
Correct |
15 ms |
33364 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
15 ms |
33108 KB |
Output is correct |
2 |
Correct |
14 ms |
33080 KB |
Output is correct |
3 |
Correct |
14 ms |
33140 KB |
Output is correct |
4 |
Correct |
14 ms |
33100 KB |
Output is correct |
5 |
Correct |
14 ms |
33160 KB |
Output is correct |
6 |
Correct |
15 ms |
33096 KB |
Output is correct |
7 |
Correct |
16 ms |
33060 KB |
Output is correct |
8 |
Correct |
15 ms |
33108 KB |
Output is correct |
9 |
Correct |
15 ms |
33096 KB |
Output is correct |
10 |
Correct |
14 ms |
33112 KB |
Output is correct |
11 |
Correct |
14 ms |
33128 KB |
Output is correct |
12 |
Correct |
14 ms |
33148 KB |
Output is correct |
13 |
Correct |
14 ms |
33084 KB |
Output is correct |
14 |
Correct |
14 ms |
33108 KB |
Output is correct |
15 |
Correct |
14 ms |
33108 KB |
Output is correct |
16 |
Correct |
15 ms |
33132 KB |
Output is correct |
17 |
Correct |
15 ms |
33108 KB |
Output is correct |
18 |
Correct |
14 ms |
33064 KB |
Output is correct |
19 |
Correct |
14 ms |
33148 KB |
Output is correct |
20 |
Correct |
14 ms |
33092 KB |
Output is correct |
21 |
Correct |
15 ms |
33108 KB |
Output is correct |
22 |
Correct |
14 ms |
33096 KB |
Output is correct |
23 |
Correct |
14 ms |
33148 KB |
Output is correct |
24 |
Correct |
14 ms |
33116 KB |
Output is correct |
25 |
Correct |
15 ms |
33212 KB |
Output is correct |
26 |
Correct |
15 ms |
33328 KB |
Output is correct |
27 |
Correct |
15 ms |
33236 KB |
Output is correct |
28 |
Correct |
17 ms |
33216 KB |
Output is correct |
29 |
Correct |
15 ms |
33236 KB |
Output is correct |
30 |
Correct |
15 ms |
33236 KB |
Output is correct |
31 |
Correct |
16 ms |
33240 KB |
Output is correct |
32 |
Correct |
17 ms |
33236 KB |
Output is correct |
33 |
Correct |
15 ms |
33280 KB |
Output is correct |
34 |
Correct |
16 ms |
33204 KB |
Output is correct |
35 |
Correct |
15 ms |
33160 KB |
Output is correct |
36 |
Correct |
15 ms |
33236 KB |
Output is correct |
37 |
Correct |
15 ms |
33376 KB |
Output is correct |
38 |
Correct |
14 ms |
33256 KB |
Output is correct |
39 |
Correct |
15 ms |
33232 KB |
Output is correct |
40 |
Correct |
15 ms |
33108 KB |
Output is correct |
41 |
Correct |
16 ms |
33364 KB |
Output is correct |
42 |
Correct |
15 ms |
33364 KB |
Output is correct |
43 |
Correct |
15 ms |
33280 KB |
Output is correct |
44 |
Correct |
15 ms |
33364 KB |
Output is correct |
45 |
Correct |
102 ms |
37252 KB |
Output is correct |
46 |
Correct |
103 ms |
38560 KB |
Output is correct |
47 |
Correct |
98 ms |
36512 KB |
Output is correct |
48 |
Correct |
116 ms |
38308 KB |
Output is correct |
49 |
Correct |
106 ms |
36808 KB |
Output is correct |
50 |
Correct |
86 ms |
38072 KB |
Output is correct |
51 |
Correct |
85 ms |
37908 KB |
Output is correct |
52 |
Correct |
82 ms |
36188 KB |
Output is correct |
53 |
Correct |
104 ms |
36148 KB |
Output is correct |
54 |
Correct |
89 ms |
43968 KB |
Output is correct |
55 |
Correct |
85 ms |
40012 KB |
Output is correct |
56 |
Correct |
86 ms |
39964 KB |
Output is correct |
57 |
Correct |
86 ms |
36172 KB |
Output is correct |
58 |
Correct |
84 ms |
36176 KB |
Output is correct |
59 |
Correct |
99 ms |
36248 KB |
Output is correct |
60 |
Correct |
97 ms |
36260 KB |
Output is correct |
61 |
Correct |
97 ms |
36120 KB |
Output is correct |
62 |
Correct |
77 ms |
36368 KB |
Output is correct |
63 |
Correct |
83 ms |
36308 KB |
Output is correct |
64 |
Correct |
83 ms |
36112 KB |
Output is correct |
65 |
Correct |
103 ms |
43972 KB |
Output is correct |
66 |
Correct |
103 ms |
43860 KB |
Output is correct |
67 |
Correct |
113 ms |
40004 KB |
Output is correct |
68 |
Correct |
110 ms |
39968 KB |
Output is correct |
69 |
Correct |
115 ms |
39832 KB |
Output is correct |
70 |
Correct |
111 ms |
39828 KB |
Output is correct |
71 |
Correct |
110 ms |
43844 KB |
Output is correct |
72 |
Correct |
109 ms |
43832 KB |
Output is correct |
73 |
Correct |
107 ms |
41496 KB |
Output is correct |
74 |
Correct |
112 ms |
41416 KB |
Output is correct |
75 |
Correct |
78 ms |
40852 KB |
Output is correct |
76 |
Correct |
79 ms |
43920 KB |
Output is correct |
77 |
Correct |
66 ms |
43948 KB |
Output is correct |
78 |
Correct |
107 ms |
38164 KB |
Output is correct |
79 |
Correct |
99 ms |
37368 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
15 ms |
33108 KB |
Output is correct |
2 |
Correct |
14 ms |
33080 KB |
Output is correct |
3 |
Correct |
14 ms |
33140 KB |
Output is correct |
4 |
Correct |
14 ms |
33100 KB |
Output is correct |
5 |
Correct |
14 ms |
33160 KB |
Output is correct |
6 |
Correct |
15 ms |
33096 KB |
Output is correct |
7 |
Correct |
16 ms |
33060 KB |
Output is correct |
8 |
Correct |
15 ms |
33108 KB |
Output is correct |
9 |
Correct |
15 ms |
33096 KB |
Output is correct |
10 |
Correct |
14 ms |
33112 KB |
Output is correct |
11 |
Correct |
14 ms |
33128 KB |
Output is correct |
12 |
Correct |
14 ms |
33148 KB |
Output is correct |
13 |
Correct |
14 ms |
33084 KB |
Output is correct |
14 |
Correct |
14 ms |
33108 KB |
Output is correct |
15 |
Correct |
14 ms |
33108 KB |
Output is correct |
16 |
Correct |
15 ms |
33132 KB |
Output is correct |
17 |
Correct |
15 ms |
33108 KB |
Output is correct |
18 |
Correct |
14 ms |
33064 KB |
Output is correct |
19 |
Correct |
14 ms |
33148 KB |
Output is correct |
20 |
Correct |
14 ms |
33092 KB |
Output is correct |
21 |
Correct |
15 ms |
33108 KB |
Output is correct |
22 |
Correct |
14 ms |
33096 KB |
Output is correct |
23 |
Correct |
14 ms |
33148 KB |
Output is correct |
24 |
Correct |
14 ms |
33116 KB |
Output is correct |
25 |
Correct |
15 ms |
33212 KB |
Output is correct |
26 |
Correct |
15 ms |
33328 KB |
Output is correct |
27 |
Correct |
15 ms |
33236 KB |
Output is correct |
28 |
Correct |
17 ms |
33216 KB |
Output is correct |
29 |
Correct |
15 ms |
33236 KB |
Output is correct |
30 |
Correct |
15 ms |
33236 KB |
Output is correct |
31 |
Correct |
16 ms |
33240 KB |
Output is correct |
32 |
Correct |
17 ms |
33236 KB |
Output is correct |
33 |
Correct |
15 ms |
33280 KB |
Output is correct |
34 |
Correct |
16 ms |
33204 KB |
Output is correct |
35 |
Correct |
15 ms |
33160 KB |
Output is correct |
36 |
Correct |
15 ms |
33236 KB |
Output is correct |
37 |
Correct |
15 ms |
33376 KB |
Output is correct |
38 |
Correct |
14 ms |
33256 KB |
Output is correct |
39 |
Correct |
15 ms |
33232 KB |
Output is correct |
40 |
Correct |
15 ms |
33108 KB |
Output is correct |
41 |
Correct |
16 ms |
33364 KB |
Output is correct |
42 |
Correct |
15 ms |
33364 KB |
Output is correct |
43 |
Correct |
15 ms |
33280 KB |
Output is correct |
44 |
Correct |
15 ms |
33364 KB |
Output is correct |
45 |
Correct |
102 ms |
37252 KB |
Output is correct |
46 |
Correct |
103 ms |
38560 KB |
Output is correct |
47 |
Correct |
98 ms |
36512 KB |
Output is correct |
48 |
Correct |
116 ms |
38308 KB |
Output is correct |
49 |
Correct |
106 ms |
36808 KB |
Output is correct |
50 |
Correct |
86 ms |
38072 KB |
Output is correct |
51 |
Correct |
85 ms |
37908 KB |
Output is correct |
52 |
Correct |
82 ms |
36188 KB |
Output is correct |
53 |
Correct |
104 ms |
36148 KB |
Output is correct |
54 |
Correct |
89 ms |
43968 KB |
Output is correct |
55 |
Correct |
85 ms |
40012 KB |
Output is correct |
56 |
Correct |
86 ms |
39964 KB |
Output is correct |
57 |
Correct |
86 ms |
36172 KB |
Output is correct |
58 |
Correct |
84 ms |
36176 KB |
Output is correct |
59 |
Correct |
99 ms |
36248 KB |
Output is correct |
60 |
Correct |
97 ms |
36260 KB |
Output is correct |
61 |
Correct |
97 ms |
36120 KB |
Output is correct |
62 |
Correct |
77 ms |
36368 KB |
Output is correct |
63 |
Correct |
83 ms |
36308 KB |
Output is correct |
64 |
Correct |
83 ms |
36112 KB |
Output is correct |
65 |
Correct |
103 ms |
43972 KB |
Output is correct |
66 |
Correct |
103 ms |
43860 KB |
Output is correct |
67 |
Correct |
113 ms |
40004 KB |
Output is correct |
68 |
Correct |
110 ms |
39968 KB |
Output is correct |
69 |
Correct |
115 ms |
39832 KB |
Output is correct |
70 |
Correct |
111 ms |
39828 KB |
Output is correct |
71 |
Correct |
110 ms |
43844 KB |
Output is correct |
72 |
Correct |
109 ms |
43832 KB |
Output is correct |
73 |
Correct |
107 ms |
41496 KB |
Output is correct |
74 |
Correct |
112 ms |
41416 KB |
Output is correct |
75 |
Correct |
78 ms |
40852 KB |
Output is correct |
76 |
Correct |
79 ms |
43920 KB |
Output is correct |
77 |
Correct |
66 ms |
43948 KB |
Output is correct |
78 |
Correct |
107 ms |
38164 KB |
Output is correct |
79 |
Correct |
99 ms |
37368 KB |
Output is correct |
80 |
Correct |
1452 ms |
69928 KB |
Output is correct |
81 |
Correct |
1399 ms |
69016 KB |
Output is correct |
82 |
Correct |
1375 ms |
65776 KB |
Output is correct |
83 |
Correct |
1391 ms |
69124 KB |
Output is correct |
84 |
Correct |
1423 ms |
69904 KB |
Output is correct |
85 |
Correct |
1145 ms |
66316 KB |
Output is correct |
86 |
Correct |
1284 ms |
69240 KB |
Output is correct |
87 |
Correct |
1321 ms |
63748 KB |
Output is correct |
88 |
Correct |
1755 ms |
63748 KB |
Output is correct |
89 |
Correct |
1124 ms |
141740 KB |
Output is correct |
90 |
Correct |
1119 ms |
102668 KB |
Output is correct |
91 |
Correct |
1083 ms |
102752 KB |
Output is correct |
92 |
Correct |
1197 ms |
64284 KB |
Output is correct |
93 |
Correct |
1311 ms |
63796 KB |
Output is correct |
94 |
Correct |
1545 ms |
64392 KB |
Output is correct |
95 |
Correct |
1431 ms |
64756 KB |
Output is correct |
96 |
Correct |
1359 ms |
65028 KB |
Output is correct |
97 |
Correct |
1264 ms |
64440 KB |
Output is correct |
98 |
Correct |
1225 ms |
66624 KB |
Output is correct |
99 |
Correct |
1229 ms |
64984 KB |
Output is correct |
100 |
Correct |
1941 ms |
141812 KB |
Output is correct |
101 |
Correct |
2083 ms |
141900 KB |
Output is correct |
102 |
Correct |
1564 ms |
102712 KB |
Output is correct |
103 |
Correct |
1503 ms |
102536 KB |
Output is correct |
104 |
Correct |
1475 ms |
99460 KB |
Output is correct |
105 |
Correct |
1471 ms |
100288 KB |
Output is correct |
106 |
Correct |
1496 ms |
142016 KB |
Output is correct |
107 |
Correct |
1427 ms |
141772 KB |
Output is correct |
108 |
Correct |
1392 ms |
116852 KB |
Output is correct |
109 |
Correct |
1382 ms |
117012 KB |
Output is correct |
110 |
Correct |
1221 ms |
140264 KB |
Output is correct |
111 |
Correct |
1166 ms |
141820 KB |
Output is correct |
112 |
Correct |
1004 ms |
142036 KB |
Output is correct |
113 |
Correct |
1510 ms |
65804 KB |
Output is correct |
114 |
Correct |
1429 ms |
68868 KB |
Output is correct |