Submission #245623

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
245623	2020-07-07T01:40:25 Z	cki86201	Port Facility (JOI17_port_facility)	C++11	100 / 100	1126 ms	159924 KB

port_facility

#include <bits/stdc++.h>
using namespace std;

#define Fi first
#define Se second
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define szz(x) (int)(x).size()
#define rep(i, n) for(int i=0;i<(n);i++)
typedef tuple<int, int, int> t3;

int N, X[2000020], A[1000010], B[1000010];
vector <int> E[1000010];
int nxt[1000010], pre[1000010], tail[1000010];
int pp[1000010], vis[1000010]; int Find(int x) { return pp[x] == x ? x : pp[x] = Find(pp[x]); }
vector <pii> edge;

void dfs(int x, int c) {
	vis[x] = c;
	for(int e : E[x]) if(!vis[e]) dfs(e, 3 - c);
}

int main() {
	scanf("%d", &N);
	for(int i=1;i<=N;i++) scanf("%d%d", A+i, B+i);
	for(int i=1;i<=N;i++) X[A[i]] = -i, X[B[i]] = i, nxt[i] = pre[i] = tail[i] = i;
	vector <pii> w;
	for(int i=1;i<=N;i++) pp[i] = i;
	for(int i=1;i<=2*N;i++) {
		int v = X[i];
		if(v < 0) w.pb({-v, 1});
		else {
			int a = Find(v), px = -1, cnt = 0;
			while(szz(w) && w.back().Fi != a) {
				int pa = w.back().Fi;
				cnt += w.back().Se;
				if(px != -1) {
					pp[px] = pa;
					int t1 = tail[pa], t2 = px;
					if(B[t1] < B[t2]) {
						puts("0"); return 0;
					}
					nxt[t1] = t2; pre[t2] = t1;
					tail[pa] = tail[px];
				}
				px = pa;
				w.pop_back();
			}
			if(w.back().Se > 1) {
				int p = w.back().Fi;
				tail[p] = pre[tail[p]];
				--w.back().Se;
			}
			else w.pop_back();
			if(px != -1) edge.pb({px, a}), w.pb({px, cnt});
		}
	}
	for(auto &[x, y] : edge) x = Find(x), y = Find(y), E[x].pb(y), E[y].pb(x);
	int ans = 1;
	for(int i=1;i<=N;i++) if(pp[i] == i && !vis[i]) {
		dfs(i, 1);
		ans = ans * 2 % 1000000007;
	}
	for(int i=1;i<=N;i++) for(int e : E[i]) if(vis[i] == vis[e]) ans = 0;
	printf("%d\n", ans);
	return 0;
}

Compilation message

port_facility.cpp: In function 'int main()':
port_facility.cpp:61:12: warning: decomposition declaration only available with -std=c++1z or -std=gnu++1z
  for(auto &[x, y] : edge) x = Find(x), y = Find(y), E[x].pb(y), E[y].pb(x);
            ^
port_facility.cpp:27:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &N);
  ~~~~~^~~~~~~~~~
port_facility.cpp:28:29: 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);
                        ~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	18 ms	23808 KB	Output is correct
2	Correct	20 ms	23808 KB	Output is correct
3	Correct	19 ms	23808 KB	Output is correct
4	Correct	18 ms	23936 KB	Output is correct
5	Correct	19 ms	23808 KB	Output is correct
6	Correct	18 ms	23808 KB	Output is correct
7	Correct	19 ms	23936 KB	Output is correct
8	Correct	18 ms	23808 KB	Output is correct
9	Correct	19 ms	23808 KB	Output is correct
10	Correct	19 ms	23808 KB	Output is correct
11	Correct	19 ms	23840 KB	Output is correct
12	Correct	21 ms	23808 KB	Output is correct
13	Correct	19 ms	23936 KB	Output is correct
14	Correct	19 ms	23936 KB	Output is correct
15	Correct	18 ms	23936 KB	Output is correct
16	Correct	18 ms	23808 KB	Output is correct
17	Correct	21 ms	23808 KB	Output is correct
18	Correct	18 ms	23808 KB	Output is correct
19	Correct	18 ms	23808 KB	Output is correct
20	Correct	21 ms	23936 KB	Output is correct
21	Correct	18 ms	23808 KB	Output is correct
22	Correct	18 ms	23808 KB	Output is correct
23	Correct	18 ms	23808 KB	Output is correct
24	Correct	19 ms	23808 KB	Output is correct

Subtask #2
12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	18 ms	23808 KB	Output is correct
2	Correct	20 ms	23808 KB	Output is correct
3	Correct	19 ms	23808 KB	Output is correct
4	Correct	18 ms	23936 KB	Output is correct
5	Correct	19 ms	23808 KB	Output is correct
6	Correct	18 ms	23808 KB	Output is correct
7	Correct	19 ms	23936 KB	Output is correct
8	Correct	18 ms	23808 KB	Output is correct
9	Correct	19 ms	23808 KB	Output is correct
10	Correct	19 ms	23808 KB	Output is correct
11	Correct	19 ms	23840 KB	Output is correct
12	Correct	21 ms	23808 KB	Output is correct
13	Correct	19 ms	23936 KB	Output is correct
14	Correct	19 ms	23936 KB	Output is correct
15	Correct	18 ms	23936 KB	Output is correct
16	Correct	18 ms	23808 KB	Output is correct
17	Correct	21 ms	23808 KB	Output is correct
18	Correct	18 ms	23808 KB	Output is correct
19	Correct	18 ms	23808 KB	Output is correct
20	Correct	21 ms	23936 KB	Output is correct
21	Correct	18 ms	23808 KB	Output is correct
22	Correct	18 ms	23808 KB	Output is correct
23	Correct	18 ms	23808 KB	Output is correct
24	Correct	19 ms	23808 KB	Output is correct
25	Correct	19 ms	23936 KB	Output is correct
26	Correct	19 ms	23936 KB	Output is correct
27	Correct	19 ms	24192 KB	Output is correct
28	Correct	20 ms	23936 KB	Output is correct
29	Correct	20 ms	24192 KB	Output is correct
30	Correct	21 ms	23936 KB	Output is correct
31	Correct	22 ms	24064 KB	Output is correct
32	Correct	20 ms	23936 KB	Output is correct
33	Correct	22 ms	23936 KB	Output is correct
34	Correct	22 ms	23936 KB	Output is correct
35	Correct	19 ms	23936 KB	Output is correct
36	Correct	19 ms	23936 KB	Output is correct
37	Correct	19 ms	23936 KB	Output is correct
38	Correct	19 ms	23936 KB	Output is correct
39	Correct	19 ms	24064 KB	Output is correct
40	Correct	21 ms	23936 KB	Output is correct
41	Correct	21 ms	24064 KB	Output is correct
42	Correct	19 ms	24064 KB	Output is correct
43	Correct	21 ms	24064 KB	Output is correct
44	Correct	20 ms	24192 KB	Output is correct

Subtask #3
56.0 / 56.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	18 ms	23808 KB	Output is correct
2	Correct	20 ms	23808 KB	Output is correct
3	Correct	19 ms	23808 KB	Output is correct
4	Correct	18 ms	23936 KB	Output is correct
5	Correct	19 ms	23808 KB	Output is correct
6	Correct	18 ms	23808 KB	Output is correct
7	Correct	19 ms	23936 KB	Output is correct
8	Correct	18 ms	23808 KB	Output is correct
9	Correct	19 ms	23808 KB	Output is correct
10	Correct	19 ms	23808 KB	Output is correct
11	Correct	19 ms	23840 KB	Output is correct
12	Correct	21 ms	23808 KB	Output is correct
13	Correct	19 ms	23936 KB	Output is correct
14	Correct	19 ms	23936 KB	Output is correct
15	Correct	18 ms	23936 KB	Output is correct
16	Correct	18 ms	23808 KB	Output is correct
17	Correct	21 ms	23808 KB	Output is correct
18	Correct	18 ms	23808 KB	Output is correct
19	Correct	18 ms	23808 KB	Output is correct
20	Correct	21 ms	23936 KB	Output is correct
21	Correct	18 ms	23808 KB	Output is correct
22	Correct	18 ms	23808 KB	Output is correct
23	Correct	18 ms	23808 KB	Output is correct
24	Correct	19 ms	23808 KB	Output is correct
25	Correct	19 ms	23936 KB	Output is correct
26	Correct	19 ms	23936 KB	Output is correct
27	Correct	19 ms	24192 KB	Output is correct
28	Correct	20 ms	23936 KB	Output is correct
29	Correct	20 ms	24192 KB	Output is correct
30	Correct	21 ms	23936 KB	Output is correct
31	Correct	22 ms	24064 KB	Output is correct
32	Correct	20 ms	23936 KB	Output is correct
33	Correct	22 ms	23936 KB	Output is correct
34	Correct	22 ms	23936 KB	Output is correct
35	Correct	19 ms	23936 KB	Output is correct
36	Correct	19 ms	23936 KB	Output is correct
37	Correct	19 ms	23936 KB	Output is correct
38	Correct	19 ms	23936 KB	Output is correct
39	Correct	19 ms	24064 KB	Output is correct
40	Correct	21 ms	23936 KB	Output is correct
41	Correct	21 ms	24064 KB	Output is correct
42	Correct	19 ms	24064 KB	Output is correct
43	Correct	21 ms	24064 KB	Output is correct
44	Correct	20 ms	24192 KB	Output is correct
45	Correct	74 ms	30960 KB	Output is correct
46	Correct	66 ms	30832 KB	Output is correct
47	Correct	104 ms	30960 KB	Output is correct
48	Correct	67 ms	30832 KB	Output is correct
49	Correct	66 ms	30960 KB	Output is correct
50	Correct	55 ms	29424 KB	Output is correct
51	Correct	54 ms	28892 KB	Output is correct
52	Correct	51 ms	28664 KB	Output is correct
53	Correct	54 ms	29548 KB	Output is correct
54	Correct	49 ms	29552 KB	Output is correct
55	Correct	50 ms	28916 KB	Output is correct
56	Correct	52 ms	28916 KB	Output is correct
57	Correct	69 ms	32112 KB	Output is correct
58	Correct	55 ms	28664 KB	Output is correct
59	Correct	57 ms	29424 KB	Output is correct
60	Correct	62 ms	30580 KB	Output is correct
61	Correct	66 ms	30704 KB	Output is correct
62	Correct	53 ms	28916 KB	Output is correct
63	Correct	49 ms	28536 KB	Output is correct
64	Correct	53 ms	29172 KB	Output is correct
65	Correct	50 ms	28916 KB	Output is correct
66	Correct	50 ms	29044 KB	Output is correct
67	Correct	65 ms	31216 KB	Output is correct
68	Correct	63 ms	31216 KB	Output is correct
69	Correct	61 ms	30448 KB	Output is correct
70	Correct	69 ms	30412 KB	Output is correct
71	Correct	64 ms	32364 KB	Output is correct
72	Correct	63 ms	32364 KB	Output is correct
73	Correct	61 ms	31980 KB	Output is correct
74	Correct	61 ms	31980 KB	Output is correct
75	Correct	74 ms	35308 KB	Output is correct
76	Correct	79 ms	37228 KB	Output is correct
77	Correct	77 ms	37204 KB	Output is correct
78	Correct	65 ms	30832 KB	Output is correct
79	Correct	73 ms	30832 KB	Output is correct

Subtask #4
22.0 / 22.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	18 ms	23808 KB	Output is correct
2	Correct	20 ms	23808 KB	Output is correct
3	Correct	19 ms	23808 KB	Output is correct
4	Correct	18 ms	23936 KB	Output is correct
5	Correct	19 ms	23808 KB	Output is correct
6	Correct	18 ms	23808 KB	Output is correct
7	Correct	19 ms	23936 KB	Output is correct
8	Correct	18 ms	23808 KB	Output is correct
9	Correct	19 ms	23808 KB	Output is correct
10	Correct	19 ms	23808 KB	Output is correct
11	Correct	19 ms	23840 KB	Output is correct
12	Correct	21 ms	23808 KB	Output is correct
13	Correct	19 ms	23936 KB	Output is correct
14	Correct	19 ms	23936 KB	Output is correct
15	Correct	18 ms	23936 KB	Output is correct
16	Correct	18 ms	23808 KB	Output is correct
17	Correct	21 ms	23808 KB	Output is correct
18	Correct	18 ms	23808 KB	Output is correct
19	Correct	18 ms	23808 KB	Output is correct
20	Correct	21 ms	23936 KB	Output is correct
21	Correct	18 ms	23808 KB	Output is correct
22	Correct	18 ms	23808 KB	Output is correct
23	Correct	18 ms	23808 KB	Output is correct
24	Correct	19 ms	23808 KB	Output is correct
25	Correct	19 ms	23936 KB	Output is correct
26	Correct	19 ms	23936 KB	Output is correct
27	Correct	19 ms	24192 KB	Output is correct
28	Correct	20 ms	23936 KB	Output is correct
29	Correct	20 ms	24192 KB	Output is correct
30	Correct	21 ms	23936 KB	Output is correct
31	Correct	22 ms	24064 KB	Output is correct
32	Correct	20 ms	23936 KB	Output is correct
33	Correct	22 ms	23936 KB	Output is correct
34	Correct	22 ms	23936 KB	Output is correct
35	Correct	19 ms	23936 KB	Output is correct
36	Correct	19 ms	23936 KB	Output is correct
37	Correct	19 ms	23936 KB	Output is correct
38	Correct	19 ms	23936 KB	Output is correct
39	Correct	19 ms	24064 KB	Output is correct
40	Correct	21 ms	23936 KB	Output is correct
41	Correct	21 ms	24064 KB	Output is correct
42	Correct	19 ms	24064 KB	Output is correct
43	Correct	21 ms	24064 KB	Output is correct
44	Correct	20 ms	24192 KB	Output is correct
45	Correct	74 ms	30960 KB	Output is correct
46	Correct	66 ms	30832 KB	Output is correct
47	Correct	104 ms	30960 KB	Output is correct
48	Correct	67 ms	30832 KB	Output is correct
49	Correct	66 ms	30960 KB	Output is correct
50	Correct	55 ms	29424 KB	Output is correct
51	Correct	54 ms	28892 KB	Output is correct
52	Correct	51 ms	28664 KB	Output is correct
53	Correct	54 ms	29548 KB	Output is correct
54	Correct	49 ms	29552 KB	Output is correct
55	Correct	50 ms	28916 KB	Output is correct
56	Correct	52 ms	28916 KB	Output is correct
57	Correct	69 ms	32112 KB	Output is correct
58	Correct	55 ms	28664 KB	Output is correct
59	Correct	57 ms	29424 KB	Output is correct
60	Correct	62 ms	30580 KB	Output is correct
61	Correct	66 ms	30704 KB	Output is correct
62	Correct	53 ms	28916 KB	Output is correct
63	Correct	49 ms	28536 KB	Output is correct
64	Correct	53 ms	29172 KB	Output is correct
65	Correct	50 ms	28916 KB	Output is correct
66	Correct	50 ms	29044 KB	Output is correct
67	Correct	65 ms	31216 KB	Output is correct
68	Correct	63 ms	31216 KB	Output is correct
69	Correct	61 ms	30448 KB	Output is correct
70	Correct	69 ms	30412 KB	Output is correct
71	Correct	64 ms	32364 KB	Output is correct
72	Correct	63 ms	32364 KB	Output is correct
73	Correct	61 ms	31980 KB	Output is correct
74	Correct	61 ms	31980 KB	Output is correct
75	Correct	74 ms	35308 KB	Output is correct
76	Correct	79 ms	37228 KB	Output is correct
77	Correct	77 ms	37204 KB	Output is correct
78	Correct	65 ms	30832 KB	Output is correct
79	Correct	73 ms	30832 KB	Output is correct
80	Correct	862 ms	95988 KB	Output is correct
81	Correct	775 ms	95912 KB	Output is correct
82	Correct	739 ms	96432 KB	Output is correct
83	Correct	857 ms	95972 KB	Output is correct
84	Correct	757 ms	95796 KB	Output is correct
85	Correct	642 ms	77004 KB	Output is correct
86	Correct	385 ms	73964 KB	Output is correct
87	Correct	415 ms	73528 KB	Output is correct
88	Correct	378 ms	81484 KB	Output is correct
89	Correct	365 ms	78028 KB	Output is correct
90	Correct	365 ms	73960 KB	Output is correct
91	Correct	355 ms	73960 KB	Output is correct
92	Correct	803 ms	108764 KB	Output is correct
93	Correct	385 ms	73720 KB	Output is correct
94	Correct	611 ms	88028 KB	Output is correct
95	Correct	697 ms	93132 KB	Output is correct
96	Correct	762 ms	94796 KB	Output is correct
97	Correct	373 ms	74852 KB	Output is correct
98	Correct	395 ms	73784 KB	Output is correct
99	Correct	358 ms	70752 KB	Output is correct
100	Correct	374 ms	73968 KB	Output is correct
101	Correct	369 ms	73832 KB	Output is correct
102	Correct	738 ms	99024 KB	Output is correct
103	Correct	705 ms	98988 KB	Output is correct
104	Correct	675 ms	90580 KB	Output is correct
105	Correct	685 ms	90580 KB	Output is correct
106	Correct	766 ms	110880 KB	Output is correct
107	Correct	776 ms	110796 KB	Output is correct
108	Correct	758 ms	106192 KB	Output is correct
109	Correct	731 ms	106316 KB	Output is correct
110	Correct	1126 ms	158676 KB	Output is correct
111	Correct	1020 ms	159616 KB	Output is correct
112	Correct	1016 ms	159924 KB	Output is correct
113	Correct	753 ms	96236 KB	Output is correct
114	Correct	804 ms	95824 KB	Output is correct

Submission #245623

Compilation message

Subtask #1 10.0 / 10.0

Subtask #2 12.0 / 12.0

Subtask #3 56.0 / 56.0

Subtask #4 22.0 / 22.0

Subtask #1
10.0 / 10.0

Subtask #2
12.0 / 12.0

Subtask #3
56.0 / 56.0

Subtask #4
22.0 / 22.0