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Submission #74445

# Submission time Handle Problem Language Result Execution time Memory
74445 2018-09-01T11:06:41 Z tmwilliamlin168 Port Facility (JOI17_port_facility) C++14
100 / 100
 2659 ms 153384 KB 
#include <bits/stdc++.h>
using namespace std;

const int mxN=1e6, M=1e9+7;
int n, a[mxN], b[mxN], c[mxN], d[2*mxN], ans=1, st[2][mxN], sth[2];

struct segtree {
	array<int, 2> a[4*mxN];
	void bld() {
		for(int i=2*n-1; i; --i)
			a[i]=max(a[2*i], a[2*i+1]);
	}
	void upd(int i, array<int, 2> x) {
		for(a[i+=2*n]=x; i/=2; )
			a[i]=max(a[2*i], a[2*i+1]);
	}
	array<int, 2> qry(int l, int r) {
		array<int, 2> b={INT_MIN, -1};
		for(l+=2*n, r+=2*n; l<r; ++l/=2, r/=2) {
			if(l&1)
				b=max(a[l], b);
			if(r&1)
				b=max(a[r-1], b);
		}
		return b;
	}
} st1, st2;

void dfs(int u) {
//	cout << "dfs " << u << endl;
	st1.upd(a[u], {-1, -1});
	st2.upd(b[u], {-2*n, -1});
	array<int, 2> v;
	while((v=st1.qry(a[u], b[u]))[1]!=-1) {
		if(v[0]<b[u])
			break;
		c[v[1]]=c[u]^1;
		dfs(v[1]);
	}
	while((v=st2.qry(a[u], b[u]))[1]!=-1) {
		if(-v[0]>a[u])
			break;
		c[v[1]]=c[u]^1;
		dfs(v[1]);
	}
}

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	
	cin >> n;
	for(int i=2*n; i<4*n; ++i) {
		st1.a[i]={-1, -1};
		st2.a[i]={-2*n, -1};
	}
	for(int i=0; i<n; ++i) {
		cin >> a[i] >> b[i], --a[i], --b[i];
		st1.a[a[i]+2*n]={b[i], i};
		st2.a[b[i]+2*n]={-a[i], i};
	}
	st1.bld();
	st2.bld();
	memset(c, -1, 4*n);
	for(int i=0; i<n; ++i) {
		if(c[i]==-1) {
			c[i]=0;
			dfs(i);
			ans=ans*2%M;
		}
//		cout << c[i] << endl;
	}
	memset(d, -1, 4*2*n);
	for(int i=0; i<n; ++i)
		d[a[i]]=d[b[i]]=i;
	for(int i=0; i<2*n; ++i) {
		if(sth[c[d[i]]]&&st[c[d[i]]][sth[c[d[i]]]-1]==d[i])
			--sth[c[d[i]]];
		else
			st[c[d[i]]][sth[c[d[i]]]++]=d[i];
	}
	cout << (!sth[0]&&!sth[1]?ans:0);
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 532 KB Output is correct
3 Correct 2 ms 532 KB Output is correct
4 Correct 2 ms 532 KB Output is correct
5 Correct 2 ms 532 KB Output is correct
6 Correct 2 ms 584 KB Output is correct
7 Correct 2 ms 584 KB Output is correct
8 Correct 2 ms 584 KB Output is correct
9 Correct 2 ms 660 KB Output is correct
10 Correct 2 ms 660 KB Output is correct
11 Correct 2 ms 660 KB Output is correct
12 Correct 2 ms 660 KB Output is correct
13 Correct 2 ms 660 KB Output is correct
14 Correct 2 ms 720 KB Output is correct
15 Correct 2 ms 720 KB Output is correct
16 Correct 2 ms 720 KB Output is correct
17 Correct 2 ms 728 KB Output is correct
18 Correct 2 ms 728 KB Output is correct
19 Correct 2 ms 728 KB Output is correct
20 Correct 2 ms 728 KB Output is correct
21 Correct 2 ms 728 KB Output is correct
22 Correct 2 ms 728 KB Output is correct
23 Correct 2 ms 728 KB Output is correct
24 Correct 2 ms 728 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 532 KB Output is correct
3 Correct 2 ms 532 KB Output is correct
4 Correct 2 ms 532 KB Output is correct
5 Correct 2 ms 532 KB Output is correct
6 Correct 2 ms 584 KB Output is correct
7 Correct 2 ms 584 KB Output is correct
8 Correct 2 ms 584 KB Output is correct
9 Correct 2 ms 660 KB Output is correct
10 Correct 2 ms 660 KB Output is correct
11 Correct 2 ms 660 KB Output is correct
12 Correct 2 ms 660 KB Output is correct
13 Correct 2 ms 660 KB Output is correct
14 Correct 2 ms 720 KB Output is correct
15 Correct 2 ms 720 KB Output is correct
16 Correct 2 ms 720 KB Output is correct
17 Correct 2 ms 728 KB Output is correct
18 Correct 2 ms 728 KB Output is correct
19 Correct 2 ms 728 KB Output is correct
20 Correct 2 ms 728 KB Output is correct
21 Correct 2 ms 728 KB Output is correct
22 Correct 2 ms 728 KB Output is correct
23 Correct 2 ms 728 KB Output is correct
24 Correct 2 ms 728 KB Output is correct
25 Correct 3 ms 864 KB Output is correct
26 Correct 4 ms 864 KB Output is correct
27 Correct 1 ms 864 KB Output is correct
28 Correct 3 ms 864 KB Output is correct
29 Correct 4 ms 864 KB Output is correct
30 Correct 4 ms 864 KB Output is correct
31 Correct 4 ms 864 KB Output is correct
32 Correct 4 ms 864 KB Output is correct
33 Correct 4 ms 864 KB Output is correct
34 Correct 4 ms 864 KB Output is correct
35 Correct 3 ms 864 KB Output is correct
36 Correct 3 ms 864 KB Output is correct
37 Correct 3 ms 864 KB Output is correct
38 Correct 3 ms 876 KB Output is correct
39 Correct 2 ms 876 KB Output is correct
40 Correct 3 ms 876 KB Output is correct
41 Correct 4 ms 876 KB Output is correct
42 Correct 4 ms 876 KB Output is correct
43 Correct 3 ms 876 KB Output is correct
44 Correct 3 ms 876 KB Output is correct

Subtask #3
56.0 / 56.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 532 KB Output is correct
3 Correct 2 ms 532 KB Output is correct
4 Correct 2 ms 532 KB Output is correct
5 Correct 2 ms 532 KB Output is correct
6 Correct 2 ms 584 KB Output is correct
7 Correct 2 ms 584 KB Output is correct
8 Correct 2 ms 584 KB Output is correct
9 Correct 2 ms 660 KB Output is correct
10 Correct 2 ms 660 KB Output is correct
11 Correct 2 ms 660 KB Output is correct
12 Correct 2 ms 660 KB Output is correct
13 Correct 2 ms 660 KB Output is correct
14 Correct 2 ms 720 KB Output is correct
15 Correct 2 ms 720 KB Output is correct
16 Correct 2 ms 720 KB Output is correct
17 Correct 2 ms 728 KB Output is correct
18 Correct 2 ms 728 KB Output is correct
19 Correct 2 ms 728 KB Output is correct
20 Correct 2 ms 728 KB Output is correct
21 Correct 2 ms 728 KB Output is correct
22 Correct 2 ms 728 KB Output is correct
23 Correct 2 ms 728 KB Output is correct
24 Correct 2 ms 728 KB Output is correct
25 Correct 3 ms 864 KB Output is correct
26 Correct 4 ms 864 KB Output is correct
27 Correct 1 ms 864 KB Output is correct
28 Correct 3 ms 864 KB Output is correct
29 Correct 4 ms 864 KB Output is correct
30 Correct 4 ms 864 KB Output is correct
31 Correct 4 ms 864 KB Output is correct
32 Correct 4 ms 864 KB Output is correct
33 Correct 4 ms 864 KB Output is correct
34 Correct 4 ms 864 KB Output is correct
35 Correct 3 ms 864 KB Output is correct
36 Correct 3 ms 864 KB Output is correct
37 Correct 3 ms 864 KB Output is correct
38 Correct 3 ms 876 KB Output is correct
39 Correct 2 ms 876 KB Output is correct
40 Correct 3 ms 876 KB Output is correct
41 Correct 4 ms 876 KB Output is correct
42 Correct 4 ms 876 KB Output is correct
43 Correct 3 ms 876 KB Output is correct
44 Correct 3 ms 876 KB Output is correct
45 Correct 103 ms 9952 KB Output is correct
46 Correct 122 ms 10720 KB Output is correct
47 Correct 109 ms 10720 KB Output is correct
48 Correct 104 ms 10720 KB Output is correct
49 Correct 102 ms 10720 KB Output is correct
50 Correct 111 ms 10720 KB Output is correct
51 Correct 109 ms 10720 KB Output is correct
52 Correct 61 ms 10720 KB Output is correct
53 Correct 100 ms 10720 KB Output is correct
54 Correct 114 ms 15920 KB Output is correct
55 Correct 125 ms 15920 KB Output is correct
56 Correct 126 ms 15920 KB Output is correct
57 Correct 66 ms 15920 KB Output is correct
58 Correct 64 ms 15920 KB Output is correct
59 Correct 93 ms 15920 KB Output is correct
60 Correct 109 ms 15920 KB Output is correct
61 Correct 119 ms 15920 KB Output is correct
62 Correct 101 ms 15920 KB Output is correct
63 Correct 115 ms 15920 KB Output is correct
64 Correct 110 ms 15920 KB Output is correct
65 Correct 177 ms 15920 KB Output is correct
66 Correct 210 ms 15996 KB Output is correct
67 Correct 134 ms 15996 KB Output is correct
68 Correct 129 ms 15996 KB Output is correct
69 Correct 130 ms 15996 KB Output is correct
70 Correct 127 ms 15996 KB Output is correct
71 Correct 125 ms 15996 KB Output is correct
72 Correct 126 ms 15996 KB Output is correct
73 Correct 119 ms 15996 KB Output is correct
74 Correct 122 ms 15996 KB Output is correct
75 Correct 80 ms 15996 KB Output is correct
76 Correct 84 ms 15996 KB Output is correct
77 Correct 83 ms 15996 KB Output is correct
78 Correct 112 ms 15996 KB Output is correct
79 Correct 115 ms 15996 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 532 KB Output is correct
3 Correct 2 ms 532 KB Output is correct
4 Correct 2 ms 532 KB Output is correct
5 Correct 2 ms 532 KB Output is correct
6 Correct 2 ms 584 KB Output is correct
7 Correct 2 ms 584 KB Output is correct
8 Correct 2 ms 584 KB Output is correct
9 Correct 2 ms 660 KB Output is correct
10 Correct 2 ms 660 KB Output is correct
11 Correct 2 ms 660 KB Output is correct
12 Correct 2 ms 660 KB Output is correct
13 Correct 2 ms 660 KB Output is correct
14 Correct 2 ms 720 KB Output is correct
15 Correct 2 ms 720 KB Output is correct
16 Correct 2 ms 720 KB Output is correct
17 Correct 2 ms 728 KB Output is correct
18 Correct 2 ms 728 KB Output is correct
19 Correct 2 ms 728 KB Output is correct
20 Correct 2 ms 728 KB Output is correct
21 Correct 2 ms 728 KB Output is correct
22 Correct 2 ms 728 KB Output is correct
23 Correct 2 ms 728 KB Output is correct
24 Correct 2 ms 728 KB Output is correct
25 Correct 3 ms 864 KB Output is correct
26 Correct 4 ms 864 KB Output is correct
27 Correct 1 ms 864 KB Output is correct
28 Correct 3 ms 864 KB Output is correct
29 Correct 4 ms 864 KB Output is correct
30 Correct 4 ms 864 KB Output is correct
31 Correct 4 ms 864 KB Output is correct
32 Correct 4 ms 864 KB Output is correct
33 Correct 4 ms 864 KB Output is correct
34 Correct 4 ms 864 KB Output is correct
35 Correct 3 ms 864 KB Output is correct
36 Correct 3 ms 864 KB Output is correct
37 Correct 3 ms 864 KB Output is correct
38 Correct 3 ms 876 KB Output is correct
39 Correct 2 ms 876 KB Output is correct
40 Correct 3 ms 876 KB Output is correct
41 Correct 4 ms 876 KB Output is correct
42 Correct 4 ms 876 KB Output is correct
43 Correct 3 ms 876 KB Output is correct
44 Correct 3 ms 876 KB Output is correct
45 Correct 103 ms 9952 KB Output is correct
46 Correct 122 ms 10720 KB Output is correct
47 Correct 109 ms 10720 KB Output is correct
48 Correct 104 ms 10720 KB Output is correct
49 Correct 102 ms 10720 KB Output is correct
50 Correct 111 ms 10720 KB Output is correct
51 Correct 109 ms 10720 KB Output is correct
52 Correct 61 ms 10720 KB Output is correct
53 Correct 100 ms 10720 KB Output is correct
54 Correct 114 ms 15920 KB Output is correct
55 Correct 125 ms 15920 KB Output is correct
56 Correct 126 ms 15920 KB Output is correct
57 Correct 66 ms 15920 KB Output is correct
58 Correct 64 ms 15920 KB Output is correct
59 Correct 93 ms 15920 KB Output is correct
60 Correct 109 ms 15920 KB Output is correct
61 Correct 119 ms 15920 KB Output is correct
62 Correct 101 ms 15920 KB Output is correct
63 Correct 115 ms 15920 KB Output is correct
64 Correct 110 ms 15920 KB Output is correct
65 Correct 177 ms 15920 KB Output is correct
66 Correct 210 ms 15996 KB Output is correct
67 Correct 134 ms 15996 KB Output is correct
68 Correct 129 ms 15996 KB Output is correct
69 Correct 130 ms 15996 KB Output is correct
70 Correct 127 ms 15996 KB Output is correct
71 Correct 125 ms 15996 KB Output is correct
72 Correct 126 ms 15996 KB Output is correct
73 Correct 119 ms 15996 KB Output is correct
74 Correct 122 ms 15996 KB Output is correct
75 Correct 80 ms 15996 KB Output is correct
76 Correct 84 ms 15996 KB Output is correct
77 Correct 83 ms 15996 KB Output is correct
78 Correct 112 ms 15996 KB Output is correct
79 Correct 115 ms 15996 KB Output is correct
80 Correct 1540 ms 88816 KB Output is correct
81 Correct 1503 ms 88816 KB Output is correct
82 Correct 1464 ms 88816 KB Output is correct
83 Correct 1555 ms 88816 KB Output is correct
84 Correct 1529 ms 88816 KB Output is correct
85 Correct 1565 ms 88816 KB Output is correct
86 Correct 1532 ms 90096 KB Output is correct
87 Correct 1055 ms 90096 KB Output is correct
88 Correct 1654 ms 90096 KB Output is correct
89 Correct 1683 ms 153340 KB Output is correct
90 Correct 1615 ms 153340 KB Output is correct
91 Correct 1568 ms 153340 KB Output is correct
92 Correct 1030 ms 153340 KB Output is correct
93 Correct 1102 ms 153340 KB Output is correct
94 Correct 1466 ms 153340 KB Output is correct
95 Correct 1457 ms 153340 KB Output is correct
96 Correct 1425 ms 153340 KB Output is correct
97 Correct 1352 ms 153340 KB Output is correct
98 Correct 1461 ms 153340 KB Output is correct
99 Correct 1403 ms 153340 KB Output is correct
100 Correct 2608 ms 153340 KB Output is correct
101 Correct 2659 ms 153384 KB Output is correct
102 Correct 1722 ms 153384 KB Output is correct
103 Correct 1723 ms 153384 KB Output is correct
104 Correct 1681 ms 153384 KB Output is correct
105 Correct 1730 ms 153384 KB Output is correct
106 Correct 1736 ms 153384 KB Output is correct
107 Correct 1735 ms 153384 KB Output is correct
108 Correct 1588 ms 153384 KB Output is correct
109 Correct 1623 ms 153384 KB Output is correct
110 Correct 1091 ms 153384 KB Output is correct
111 Correct 1084 ms 153384 KB Output is correct
112 Correct 1079 ms 153384 KB Output is correct
113 Correct 1440 ms 153384 KB Output is correct
114 Correct 1491 ms 153384 KB Output is correct