Submission #59898

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
59898	2018-07-23T09:29:09 Z	babo	Port Facility (JOI17_port_facility)	C++14	100 / 100	3577 ms	219716 KB

port_facility

#include <bits/stdc++.h>
#define L long long
#define mod 1000000007

using namespace std;

struct S{
	L s,e,ord;
}a[1000010];

bool operator<(S a,S b){
	return a.e<b.e;
}

bool cmps(S a,S b){
	return a.s<b.s;
}
bool cmpe(S a,S b){
	return a.e<b.e;
}


L n,ans=1;
L color[1000010];



vector<L>v[1000010];

void dfs(L x){
	L i;
	for(i=0;i<v[x].size();i++)
	{
		if(!color[v[x][i]])
		{
			color[v[x][i]]=3-color[x];
			dfs(v[x][i]);
		}
	}
}

bool ok(){
	L i;
	stack<L>s1,s2;
	for(i=1;i<=n;i++)
	{
		if(color[a[i].ord]==1)
		{
			while(!s1.empty()&&s1.top()<a[i].s) s1.pop();
			if(!s1.empty()&&s1.top()<a[i].e) return 0;
			s1.push(a[i].e);
		}
		else
		{
			while(!s2.empty()&&s2.top()<a[i].s) s2.pop();
			if(!s2.empty()&&s2.top()<a[i].e) return 0;
			s2.push(a[i].e);
		}
	}
	return 1;
}

int main()
{
	scanf("%lld",&n);
	L i;
	for(i=1;i<=n;i++)
	{
		scanf("%lld %lld",&a[i].s,&a[i].e);
		a[i].ord=i;
	}
	sort(a+1,a+n+1,cmps);
	set<S>st;
	for(i=1;i<=n;i++)
	{
		set<S>::iterator it=st.lower_bound((S){a[i].e,a[i].s});
		while(it!=st.end()&&it->e<a[i].e)
		{
			v[a[i].ord].push_back(it->ord);
			v[it->ord].push_back(a[i].ord);
			st.erase(it);
			it=st.lower_bound((S){a[i].e,a[i].s});
		}
		st.insert(a[i]);
	}
	while(!st.empty())
	{
		st.erase(st.begin());
	}
	
	
	for(i=1;i<=n;i++)
	{
		a[i].e*=-1;
		a[i].s*=-1;
		swap(a[i].s,a[i].e);
	}
	
	sort(a+1,a+n+1,cmps);
	
	while(!st.empty())
	{
		st.erase(st.begin());
	}
	for(i=1;i<=n;i++)
	{
		set<S>::iterator it=st.lower_bound((S){a[i].e,a[i].s});
		while(it!=st.end()&&it->e<a[i].e)
		{
			v[a[i].ord].push_back(it->ord);
			v[it->ord].push_back(a[i].ord);
			st.erase(it);
			it=st.lower_bound((S){a[i].e,a[i].s});
		}
		st.insert(a[i]);
	}
	
	
	
	for(i=1;i<=n;i++)
	{
		a[i].e*=-1;
		a[i].s*=-1;
		swap(a[i].s,a[i].e);
	}
	
	sort(a+1,a+n+1,cmps);
	
	for(i=1;i<=n;i++)
	{
		if(!color[i])
		{
			ans*=2;
			ans%=mod;
			color[i]=1;
			dfs(i);
		}
		//printf("%lld ",color[i]);
	}
	if(!ok()) printf("%lld",0);
	else printf("%lld",ans);
}

Compilation message

port_facility.cpp: In function 'void dfs(long long int)':
port_facility.cpp:32:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(i=0;i<v[x].size();i++)
          ~^~~~~~~~~~~~
port_facility.cpp: In function 'int main()':
port_facility.cpp:140:27: warning: format '%lld' expects argument of type 'long long int', but argument 2 has type 'int' [-Wformat=]
  if(!ok()) printf("%lld",0);
                           ^
port_facility.cpp:65:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld",&n);
  ~~~~~^~~~~~~~~~~
port_facility.cpp:69:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld %lld",&a[i].s,&a[i].e);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	26 ms	23928 KB	Output is correct
2	Correct	25 ms	23928 KB	Output is correct
3	Correct	23 ms	23976 KB	Output is correct
4	Correct	24 ms	23976 KB	Output is correct
5	Correct	23 ms	23976 KB	Output is correct
6	Correct	23 ms	24108 KB	Output is correct
7	Correct	29 ms	24112 KB	Output is correct
8	Correct	32 ms	24112 KB	Output is correct
9	Correct	23 ms	24112 KB	Output is correct
10	Correct	24 ms	24112 KB	Output is correct
11	Correct	29 ms	24112 KB	Output is correct
12	Correct	34 ms	24112 KB	Output is correct
13	Correct	27 ms	24112 KB	Output is correct
14	Correct	24 ms	24112 KB	Output is correct
15	Correct	29 ms	24112 KB	Output is correct
16	Correct	27 ms	24112 KB	Output is correct
17	Correct	26 ms	24112 KB	Output is correct
18	Correct	26 ms	24112 KB	Output is correct
19	Correct	28 ms	24112 KB	Output is correct
20	Correct	29 ms	24248 KB	Output is correct
21	Correct	28 ms	24308 KB	Output is correct
22	Correct	27 ms	24308 KB	Output is correct
23	Correct	24 ms	24308 KB	Output is correct
24	Correct	24 ms	24308 KB	Output is correct

Subtask #2
12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	26 ms	23928 KB	Output is correct
2	Correct	25 ms	23928 KB	Output is correct
3	Correct	23 ms	23976 KB	Output is correct
4	Correct	24 ms	23976 KB	Output is correct
5	Correct	23 ms	23976 KB	Output is correct
6	Correct	23 ms	24108 KB	Output is correct
7	Correct	29 ms	24112 KB	Output is correct
8	Correct	32 ms	24112 KB	Output is correct
9	Correct	23 ms	24112 KB	Output is correct
10	Correct	24 ms	24112 KB	Output is correct
11	Correct	29 ms	24112 KB	Output is correct
12	Correct	34 ms	24112 KB	Output is correct
13	Correct	27 ms	24112 KB	Output is correct
14	Correct	24 ms	24112 KB	Output is correct
15	Correct	29 ms	24112 KB	Output is correct
16	Correct	27 ms	24112 KB	Output is correct
17	Correct	26 ms	24112 KB	Output is correct
18	Correct	26 ms	24112 KB	Output is correct
19	Correct	28 ms	24112 KB	Output is correct
20	Correct	29 ms	24248 KB	Output is correct
21	Correct	28 ms	24308 KB	Output is correct
22	Correct	27 ms	24308 KB	Output is correct
23	Correct	24 ms	24308 KB	Output is correct
24	Correct	24 ms	24308 KB	Output is correct
25	Correct	27 ms	24388 KB	Output is correct
26	Correct	32 ms	24404 KB	Output is correct
27	Correct	27 ms	24428 KB	Output is correct
28	Correct	34 ms	24444 KB	Output is correct
29	Correct	30 ms	24464 KB	Output is correct
30	Correct	31 ms	24488 KB	Output is correct
31	Correct	37 ms	24504 KB	Output is correct
32	Correct	30 ms	24528 KB	Output is correct
33	Correct	33 ms	24544 KB	Output is correct
34	Correct	36 ms	24544 KB	Output is correct
35	Correct	30 ms	24584 KB	Output is correct
36	Correct	26 ms	24636 KB	Output is correct
37	Correct	33 ms	24636 KB	Output is correct
38	Correct	33 ms	24644 KB	Output is correct
39	Correct	34 ms	24664 KB	Output is correct
40	Correct	34 ms	24684 KB	Output is correct
41	Correct	27 ms	24684 KB	Output is correct
42	Correct	26 ms	24768 KB	Output is correct
43	Correct	36 ms	24864 KB	Output is correct
44	Correct	34 ms	24884 KB	Output is correct

Subtask #3
56.0 / 56.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	26 ms	23928 KB	Output is correct
2	Correct	25 ms	23928 KB	Output is correct
3	Correct	23 ms	23976 KB	Output is correct
4	Correct	24 ms	23976 KB	Output is correct
5	Correct	23 ms	23976 KB	Output is correct
6	Correct	23 ms	24108 KB	Output is correct
7	Correct	29 ms	24112 KB	Output is correct
8	Correct	32 ms	24112 KB	Output is correct
9	Correct	23 ms	24112 KB	Output is correct
10	Correct	24 ms	24112 KB	Output is correct
11	Correct	29 ms	24112 KB	Output is correct
12	Correct	34 ms	24112 KB	Output is correct
13	Correct	27 ms	24112 KB	Output is correct
14	Correct	24 ms	24112 KB	Output is correct
15	Correct	29 ms	24112 KB	Output is correct
16	Correct	27 ms	24112 KB	Output is correct
17	Correct	26 ms	24112 KB	Output is correct
18	Correct	26 ms	24112 KB	Output is correct
19	Correct	28 ms	24112 KB	Output is correct
20	Correct	29 ms	24248 KB	Output is correct
21	Correct	28 ms	24308 KB	Output is correct
22	Correct	27 ms	24308 KB	Output is correct
23	Correct	24 ms	24308 KB	Output is correct
24	Correct	24 ms	24308 KB	Output is correct
25	Correct	27 ms	24388 KB	Output is correct
26	Correct	32 ms	24404 KB	Output is correct
27	Correct	27 ms	24428 KB	Output is correct
28	Correct	34 ms	24444 KB	Output is correct
29	Correct	30 ms	24464 KB	Output is correct
30	Correct	31 ms	24488 KB	Output is correct
31	Correct	37 ms	24504 KB	Output is correct
32	Correct	30 ms	24528 KB	Output is correct
33	Correct	33 ms	24544 KB	Output is correct
34	Correct	36 ms	24544 KB	Output is correct
35	Correct	30 ms	24584 KB	Output is correct
36	Correct	26 ms	24636 KB	Output is correct
37	Correct	33 ms	24636 KB	Output is correct
38	Correct	33 ms	24644 KB	Output is correct
39	Correct	34 ms	24664 KB	Output is correct
40	Correct	34 ms	24684 KB	Output is correct
41	Correct	27 ms	24684 KB	Output is correct
42	Correct	26 ms	24768 KB	Output is correct
43	Correct	36 ms	24864 KB	Output is correct
44	Correct	34 ms	24884 KB	Output is correct
45	Correct	296 ms	36016 KB	Output is correct
46	Correct	241 ms	36816 KB	Output is correct
47	Correct	261 ms	36820 KB	Output is correct
48	Correct	242 ms	36820 KB	Output is correct
49	Correct	284 ms	36820 KB	Output is correct
50	Correct	235 ms	36820 KB	Output is correct
51	Correct	269 ms	36820 KB	Output is correct
52	Correct	185 ms	36820 KB	Output is correct
53	Correct	195 ms	36820 KB	Output is correct
54	Correct	177 ms	37188 KB	Output is correct
55	Correct	159 ms	37188 KB	Output is correct
56	Correct	193 ms	37188 KB	Output is correct
57	Correct	286 ms	37188 KB	Output is correct
58	Correct	210 ms	37188 KB	Output is correct
59	Correct	187 ms	37188 KB	Output is correct
60	Correct	275 ms	37188 KB	Output is correct
61	Correct	246 ms	37188 KB	Output is correct
62	Correct	205 ms	37188 KB	Output is correct
63	Correct	238 ms	37188 KB	Output is correct
64	Correct	268 ms	37188 KB	Output is correct
65	Correct	259 ms	37956 KB	Output is correct
66	Correct	273 ms	39148 KB	Output is correct
67	Correct	306 ms	39148 KB	Output is correct
68	Correct	263 ms	39148 KB	Output is correct
69	Correct	264 ms	39148 KB	Output is correct
70	Correct	243 ms	39148 KB	Output is correct
71	Correct	281 ms	39148 KB	Output is correct
72	Correct	281 ms	39148 KB	Output is correct
73	Correct	263 ms	39148 KB	Output is correct
74	Correct	267 ms	39148 KB	Output is correct
75	Correct	162 ms	39148 KB	Output is correct
76	Correct	285 ms	39148 KB	Output is correct
77	Correct	244 ms	39148 KB	Output is correct
78	Correct	309 ms	39148 KB	Output is correct
79	Correct	239 ms	39148 KB	Output is correct

Subtask #4
22.0 / 22.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	26 ms	23928 KB	Output is correct
2	Correct	25 ms	23928 KB	Output is correct
3	Correct	23 ms	23976 KB	Output is correct
4	Correct	24 ms	23976 KB	Output is correct
5	Correct	23 ms	23976 KB	Output is correct
6	Correct	23 ms	24108 KB	Output is correct
7	Correct	29 ms	24112 KB	Output is correct
8	Correct	32 ms	24112 KB	Output is correct
9	Correct	23 ms	24112 KB	Output is correct
10	Correct	24 ms	24112 KB	Output is correct
11	Correct	29 ms	24112 KB	Output is correct
12	Correct	34 ms	24112 KB	Output is correct
13	Correct	27 ms	24112 KB	Output is correct
14	Correct	24 ms	24112 KB	Output is correct
15	Correct	29 ms	24112 KB	Output is correct
16	Correct	27 ms	24112 KB	Output is correct
17	Correct	26 ms	24112 KB	Output is correct
18	Correct	26 ms	24112 KB	Output is correct
19	Correct	28 ms	24112 KB	Output is correct
20	Correct	29 ms	24248 KB	Output is correct
21	Correct	28 ms	24308 KB	Output is correct
22	Correct	27 ms	24308 KB	Output is correct
23	Correct	24 ms	24308 KB	Output is correct
24	Correct	24 ms	24308 KB	Output is correct
25	Correct	27 ms	24388 KB	Output is correct
26	Correct	32 ms	24404 KB	Output is correct
27	Correct	27 ms	24428 KB	Output is correct
28	Correct	34 ms	24444 KB	Output is correct
29	Correct	30 ms	24464 KB	Output is correct
30	Correct	31 ms	24488 KB	Output is correct
31	Correct	37 ms	24504 KB	Output is correct
32	Correct	30 ms	24528 KB	Output is correct
33	Correct	33 ms	24544 KB	Output is correct
34	Correct	36 ms	24544 KB	Output is correct
35	Correct	30 ms	24584 KB	Output is correct
36	Correct	26 ms	24636 KB	Output is correct
37	Correct	33 ms	24636 KB	Output is correct
38	Correct	33 ms	24644 KB	Output is correct
39	Correct	34 ms	24664 KB	Output is correct
40	Correct	34 ms	24684 KB	Output is correct
41	Correct	27 ms	24684 KB	Output is correct
42	Correct	26 ms	24768 KB	Output is correct
43	Correct	36 ms	24864 KB	Output is correct
44	Correct	34 ms	24884 KB	Output is correct
45	Correct	296 ms	36016 KB	Output is correct
46	Correct	241 ms	36816 KB	Output is correct
47	Correct	261 ms	36820 KB	Output is correct
48	Correct	242 ms	36820 KB	Output is correct
49	Correct	284 ms	36820 KB	Output is correct
50	Correct	235 ms	36820 KB	Output is correct
51	Correct	269 ms	36820 KB	Output is correct
52	Correct	185 ms	36820 KB	Output is correct
53	Correct	195 ms	36820 KB	Output is correct
54	Correct	177 ms	37188 KB	Output is correct
55	Correct	159 ms	37188 KB	Output is correct
56	Correct	193 ms	37188 KB	Output is correct
57	Correct	286 ms	37188 KB	Output is correct
58	Correct	210 ms	37188 KB	Output is correct
59	Correct	187 ms	37188 KB	Output is correct
60	Correct	275 ms	37188 KB	Output is correct
61	Correct	246 ms	37188 KB	Output is correct
62	Correct	205 ms	37188 KB	Output is correct
63	Correct	238 ms	37188 KB	Output is correct
64	Correct	268 ms	37188 KB	Output is correct
65	Correct	259 ms	37956 KB	Output is correct
66	Correct	273 ms	39148 KB	Output is correct
67	Correct	306 ms	39148 KB	Output is correct
68	Correct	263 ms	39148 KB	Output is correct
69	Correct	264 ms	39148 KB	Output is correct
70	Correct	243 ms	39148 KB	Output is correct
71	Correct	281 ms	39148 KB	Output is correct
72	Correct	281 ms	39148 KB	Output is correct
73	Correct	263 ms	39148 KB	Output is correct
74	Correct	267 ms	39148 KB	Output is correct
75	Correct	162 ms	39148 KB	Output is correct
76	Correct	285 ms	39148 KB	Output is correct
77	Correct	244 ms	39148 KB	Output is correct
78	Correct	309 ms	39148 KB	Output is correct
79	Correct	239 ms	39148 KB	Output is correct
80	Correct	3027 ms	129204 KB	Output is correct
81	Correct	3266 ms	131340 KB	Output is correct
82	Correct	3118 ms	145812 KB	Output is correct
83	Correct	3023 ms	160472 KB	Output is correct
84	Correct	3290 ms	168240 KB	Output is correct
85	Correct	3216 ms	168240 KB	Output is correct
86	Correct	3191 ms	168240 KB	Output is correct
87	Correct	2238 ms	168240 KB	Output is correct
88	Correct	2418 ms	168240 KB	Output is correct
89	Correct	2239 ms	169316 KB	Output is correct
90	Correct	2330 ms	169316 KB	Output is correct
91	Correct	2690 ms	169316 KB	Output is correct
92	Correct	3441 ms	169316 KB	Output is correct
93	Correct	2314 ms	169316 KB	Output is correct
94	Correct	2631 ms	169316 KB	Output is correct
95	Correct	2931 ms	169316 KB	Output is correct
96	Correct	2855 ms	169316 KB	Output is correct
97	Correct	2682 ms	169316 KB	Output is correct
98	Correct	3577 ms	169316 KB	Output is correct
99	Correct	3245 ms	169316 KB	Output is correct
100	Correct	3397 ms	191224 KB	Output is correct
101	Correct	3175 ms	191224 KB	Output is correct
102	Correct	2925 ms	191224 KB	Output is correct
103	Correct	2797 ms	191224 KB	Output is correct
104	Correct	3228 ms	191224 KB	Output is correct
105	Correct	3207 ms	196004 KB	Output is correct
106	Correct	3031 ms	204784 KB	Output is correct
107	Correct	2851 ms	204784 KB	Output is correct
108	Correct	3193 ms	204784 KB	Output is correct
109	Correct	3164 ms	204784 KB	Output is correct
110	Correct	2258 ms	218664 KB	Output is correct
111	Correct	2896 ms	219716 KB	Output is correct
112	Correct	3364 ms	219716 KB	Output is correct
113	Correct	3250 ms	219716 KB	Output is correct
114	Correct	3263 ms	219716 KB	Output is correct

Submission #59898

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