Submission #132111

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
132111	2019-07-18T10:09:19 Z	shayan_p	Port Facility (JOI17_port_facility)	C++14	100 / 100	3418 ms	366756 KB

port_facility

// only miss the sun when it starts to snow

#include<bits/stdc++.h>

#define F first
#define S second
#define PB push_back
#define sz(s) int((s).size())
#define bit(n,k) (((n)>>(k))&1)

using namespace std;

typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

const int maxn=2e6+10,mod=1e9+7;
const ll inf=1e18;

int par[maxn], who[maxn], n;
bool st[maxn], bad=0;
vector<int> v[4*maxn];

pair<int,bool> Find(int u){
    if(par[u]<0) return {u,0};
    pair<int,bool> a= Find(par[u]);
    a.S^= st[u];
    par[u]= a.F, st[u]= a.S;

    return {par[u],st[u]};
}
void Merge(int a,int b){
    if(a==b) return;
    pair<int,bool> A=Find(a), B=Find(b);

    if(A.F == B.F){
	bad|= A.S==B.S;
	return;
    }
    if( par[A.F] > par[B.F] ) swap(A,B);

    par[A.F]+=par[B.F];
    par[B.F]= A.F;
    st[B.F]= A.S ^ B.S ^ 1;
}

void build(int l=0,int r=maxn, int id=1){
    if(r-l==1){
	if(who[l] != 0)	v[id].PB( who[l] );
	return;
    }
    int mid=(l+r)>>1;
    build(l,mid,2*id);
    build(mid,r,2*id+1);
    v[id].resize( sz(v[2*id]) + sz(v[2*id+1]) );
    merge( v[2*id].begin(), v[2*id].end(), v[2*id+1].begin(), v[2*id+1].end(), v[id].begin() );
}
void mrg(int f,int s,int l=0,int r=maxn,int id=1){
    if(f>=s || l>=r|| s<=l || r<=f) return;
    if(f<=l && r<=s){
	int mx=-1;
	while(sz(v[id]) && s<v[id].back() ) Merge(v[id].back(), s), mx=max(mx, v[id].back() ), v[id].pop_back();
	if(mx!=-1) v[id].PB(mx);
	return;
    }
    int mid=(l+r)>>1;
    mrg(f,s,l,mid,2*id), mrg(f,s,mid,r,2*id+1);
}

int main(){
    ios_base::sync_with_stdio(false);cin.tie(0);

    memset(par,-1,sizeof par);

    cin>>n;

    for(int i=0;i<n;i++){
	int a,b; cin>>a>>b;
	who[a]= b;
    }

    build();

    for(int i=1;i<=2*n;i++){
	if(who[i]!=0){
	    mrg(i,who[i]);
	}
    }
    if(bad) return cout<<0<<endl,0;

    int ans=1;
    
    for(int i=1;i<=2*n;i++){
	if(who[i]!=0 && Find(who[i]).F == who[i] ){
	    ans= 2ll*ans %mod;
	}
    }
    return cout<<ans<<endl,0;
}
// Deathly mistakes:
//  * Read the problem curfully.
//  * Check maxn.
//  * Overflows.


// #pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

Subtask #1
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	208 ms	196132 KB	Output is correct
2	Correct	210 ms	196088 KB	Output is correct
3	Correct	210 ms	196088 KB	Output is correct
4	Correct	207 ms	196072 KB	Output is correct
5	Correct	207 ms	196120 KB	Output is correct
6	Correct	208 ms	196220 KB	Output is correct
7	Correct	209 ms	196140 KB	Output is correct
8	Correct	224 ms	196132 KB	Output is correct
9	Correct	208 ms	196060 KB	Output is correct
10	Correct	214 ms	196088 KB	Output is correct
11	Correct	210 ms	196148 KB	Output is correct
12	Correct	225 ms	196088 KB	Output is correct
13	Correct	209 ms	196012 KB	Output is correct
14	Correct	208 ms	196088 KB	Output is correct
15	Correct	207 ms	196208 KB	Output is correct
16	Correct	211 ms	196088 KB	Output is correct
17	Correct	209 ms	196188 KB	Output is correct
18	Correct	227 ms	196044 KB	Output is correct
19	Correct	207 ms	195988 KB	Output is correct
20	Correct	206 ms	196088 KB	Output is correct
21	Correct	207 ms	196144 KB	Output is correct
22	Correct	207 ms	196088 KB	Output is correct
23	Correct	208 ms	196088 KB	Output is correct
24	Correct	210 ms	196176 KB	Output is correct

Subtask #2
12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	208 ms	196132 KB	Output is correct
2	Correct	210 ms	196088 KB	Output is correct
3	Correct	210 ms	196088 KB	Output is correct
4	Correct	207 ms	196072 KB	Output is correct
5	Correct	207 ms	196120 KB	Output is correct
6	Correct	208 ms	196220 KB	Output is correct
7	Correct	209 ms	196140 KB	Output is correct
8	Correct	224 ms	196132 KB	Output is correct
9	Correct	208 ms	196060 KB	Output is correct
10	Correct	214 ms	196088 KB	Output is correct
11	Correct	210 ms	196148 KB	Output is correct
12	Correct	225 ms	196088 KB	Output is correct
13	Correct	209 ms	196012 KB	Output is correct
14	Correct	208 ms	196088 KB	Output is correct
15	Correct	207 ms	196208 KB	Output is correct
16	Correct	211 ms	196088 KB	Output is correct
17	Correct	209 ms	196188 KB	Output is correct
18	Correct	227 ms	196044 KB	Output is correct
19	Correct	207 ms	195988 KB	Output is correct
20	Correct	206 ms	196088 KB	Output is correct
21	Correct	207 ms	196144 KB	Output is correct
22	Correct	207 ms	196088 KB	Output is correct
23	Correct	208 ms	196088 KB	Output is correct
24	Correct	210 ms	196176 KB	Output is correct
25	Correct	227 ms	196352 KB	Output is correct
26	Correct	211 ms	196344 KB	Output is correct
27	Correct	251 ms	196316 KB	Output is correct
28	Correct	213 ms	196472 KB	Output is correct
29	Correct	212 ms	196344 KB	Output is correct
30	Correct	213 ms	196432 KB	Output is correct
31	Correct	211 ms	196388 KB	Output is correct
32	Correct	211 ms	196404 KB	Output is correct
33	Correct	209 ms	196344 KB	Output is correct
34	Correct	212 ms	196508 KB	Output is correct
35	Correct	211 ms	196500 KB	Output is correct
36	Correct	216 ms	196472 KB	Output is correct
37	Correct	213 ms	196476 KB	Output is correct
38	Correct	220 ms	196344 KB	Output is correct
39	Correct	215 ms	196472 KB	Output is correct
40	Correct	209 ms	196344 KB	Output is correct
41	Correct	222 ms	196472 KB	Output is correct
42	Correct	210 ms	196332 KB	Output is correct
43	Correct	241 ms	196344 KB	Output is correct
44	Correct	215 ms	196616 KB	Output is correct

Subtask #3
56.0 / 56.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	208 ms	196132 KB	Output is correct
2	Correct	210 ms	196088 KB	Output is correct
3	Correct	210 ms	196088 KB	Output is correct
4	Correct	207 ms	196072 KB	Output is correct
5	Correct	207 ms	196120 KB	Output is correct
6	Correct	208 ms	196220 KB	Output is correct
7	Correct	209 ms	196140 KB	Output is correct
8	Correct	224 ms	196132 KB	Output is correct
9	Correct	208 ms	196060 KB	Output is correct
10	Correct	214 ms	196088 KB	Output is correct
11	Correct	210 ms	196148 KB	Output is correct
12	Correct	225 ms	196088 KB	Output is correct
13	Correct	209 ms	196012 KB	Output is correct
14	Correct	208 ms	196088 KB	Output is correct
15	Correct	207 ms	196208 KB	Output is correct
16	Correct	211 ms	196088 KB	Output is correct
17	Correct	209 ms	196188 KB	Output is correct
18	Correct	227 ms	196044 KB	Output is correct
19	Correct	207 ms	195988 KB	Output is correct
20	Correct	206 ms	196088 KB	Output is correct
21	Correct	207 ms	196144 KB	Output is correct
22	Correct	207 ms	196088 KB	Output is correct
23	Correct	208 ms	196088 KB	Output is correct
24	Correct	210 ms	196176 KB	Output is correct
25	Correct	227 ms	196352 KB	Output is correct
26	Correct	211 ms	196344 KB	Output is correct
27	Correct	251 ms	196316 KB	Output is correct
28	Correct	213 ms	196472 KB	Output is correct
29	Correct	212 ms	196344 KB	Output is correct
30	Correct	213 ms	196432 KB	Output is correct
31	Correct	211 ms	196388 KB	Output is correct
32	Correct	211 ms	196404 KB	Output is correct
33	Correct	209 ms	196344 KB	Output is correct
34	Correct	212 ms	196508 KB	Output is correct
35	Correct	211 ms	196500 KB	Output is correct
36	Correct	216 ms	196472 KB	Output is correct
37	Correct	213 ms	196476 KB	Output is correct
38	Correct	220 ms	196344 KB	Output is correct
39	Correct	215 ms	196472 KB	Output is correct
40	Correct	209 ms	196344 KB	Output is correct
41	Correct	222 ms	196472 KB	Output is correct
42	Correct	210 ms	196332 KB	Output is correct
43	Correct	241 ms	196344 KB	Output is correct
44	Correct	215 ms	196616 KB	Output is correct
45	Correct	334 ms	212952 KB	Output is correct
46	Correct	346 ms	212944 KB	Output is correct
47	Correct	343 ms	213000 KB	Output is correct
48	Correct	340 ms	212984 KB	Output is correct
49	Correct	336 ms	212984 KB	Output is correct
50	Correct	339 ms	212900 KB	Output is correct
51	Correct	345 ms	213000 KB	Output is correct
52	Correct	348 ms	214308 KB	Output is correct
53	Correct	314 ms	211192 KB	Output is correct
54	Correct	349 ms	211104 KB	Output is correct
55	Correct	344 ms	211128 KB	Output is correct
56	Correct	350 ms	211192 KB	Output is correct
57	Correct	316 ms	213624 KB	Output is correct
58	Correct	315 ms	213512 KB	Output is correct
59	Correct	341 ms	213620 KB	Output is correct
60	Correct	336 ms	213104 KB	Output is correct
61	Correct	335 ms	213112 KB	Output is correct
62	Correct	369 ms	213376 KB	Output is correct
63	Correct	328 ms	213028 KB	Output is correct
64	Correct	392 ms	213016 KB	Output is correct
65	Correct	450 ms	212216 KB	Output is correct
66	Correct	456 ms	212168 KB	Output is correct
67	Correct	375 ms	212184 KB	Output is correct
68	Correct	348 ms	212252 KB	Output is correct
69	Correct	374 ms	212008 KB	Output is correct
70	Correct	362 ms	211904 KB	Output is correct
71	Correct	321 ms	211156 KB	Output is correct
72	Correct	317 ms	211064 KB	Output is correct
73	Correct	318 ms	211064 KB	Output is correct
74	Correct	322 ms	211056 KB	Output is correct
75	Correct	315 ms	214304 KB	Output is correct
76	Correct	319 ms	214264 KB	Output is correct
77	Correct	340 ms	214344 KB	Output is correct
78	Correct	361 ms	213024 KB	Output is correct
79	Correct	334 ms	212856 KB	Output is correct

Subtask #4
22.0 / 22.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	208 ms	196132 KB	Output is correct
2	Correct	210 ms	196088 KB	Output is correct
3	Correct	210 ms	196088 KB	Output is correct
4	Correct	207 ms	196072 KB	Output is correct
5	Correct	207 ms	196120 KB	Output is correct
6	Correct	208 ms	196220 KB	Output is correct
7	Correct	209 ms	196140 KB	Output is correct
8	Correct	224 ms	196132 KB	Output is correct
9	Correct	208 ms	196060 KB	Output is correct
10	Correct	214 ms	196088 KB	Output is correct
11	Correct	210 ms	196148 KB	Output is correct
12	Correct	225 ms	196088 KB	Output is correct
13	Correct	209 ms	196012 KB	Output is correct
14	Correct	208 ms	196088 KB	Output is correct
15	Correct	207 ms	196208 KB	Output is correct
16	Correct	211 ms	196088 KB	Output is correct
17	Correct	209 ms	196188 KB	Output is correct
18	Correct	227 ms	196044 KB	Output is correct
19	Correct	207 ms	195988 KB	Output is correct
20	Correct	206 ms	196088 KB	Output is correct
21	Correct	207 ms	196144 KB	Output is correct
22	Correct	207 ms	196088 KB	Output is correct
23	Correct	208 ms	196088 KB	Output is correct
24	Correct	210 ms	196176 KB	Output is correct
25	Correct	227 ms	196352 KB	Output is correct
26	Correct	211 ms	196344 KB	Output is correct
27	Correct	251 ms	196316 KB	Output is correct
28	Correct	213 ms	196472 KB	Output is correct
29	Correct	212 ms	196344 KB	Output is correct
30	Correct	213 ms	196432 KB	Output is correct
31	Correct	211 ms	196388 KB	Output is correct
32	Correct	211 ms	196404 KB	Output is correct
33	Correct	209 ms	196344 KB	Output is correct
34	Correct	212 ms	196508 KB	Output is correct
35	Correct	211 ms	196500 KB	Output is correct
36	Correct	216 ms	196472 KB	Output is correct
37	Correct	213 ms	196476 KB	Output is correct
38	Correct	220 ms	196344 KB	Output is correct
39	Correct	215 ms	196472 KB	Output is correct
40	Correct	209 ms	196344 KB	Output is correct
41	Correct	222 ms	196472 KB	Output is correct
42	Correct	210 ms	196332 KB	Output is correct
43	Correct	241 ms	196344 KB	Output is correct
44	Correct	215 ms	196616 KB	Output is correct
45	Correct	334 ms	212952 KB	Output is correct
46	Correct	346 ms	212944 KB	Output is correct
47	Correct	343 ms	213000 KB	Output is correct
48	Correct	340 ms	212984 KB	Output is correct
49	Correct	336 ms	212984 KB	Output is correct
50	Correct	339 ms	212900 KB	Output is correct
51	Correct	345 ms	213000 KB	Output is correct
52	Correct	348 ms	214308 KB	Output is correct
53	Correct	314 ms	211192 KB	Output is correct
54	Correct	349 ms	211104 KB	Output is correct
55	Correct	344 ms	211128 KB	Output is correct
56	Correct	350 ms	211192 KB	Output is correct
57	Correct	316 ms	213624 KB	Output is correct
58	Correct	315 ms	213512 KB	Output is correct
59	Correct	341 ms	213620 KB	Output is correct
60	Correct	336 ms	213104 KB	Output is correct
61	Correct	335 ms	213112 KB	Output is correct
62	Correct	369 ms	213376 KB	Output is correct
63	Correct	328 ms	213028 KB	Output is correct
64	Correct	392 ms	213016 KB	Output is correct
65	Correct	450 ms	212216 KB	Output is correct
66	Correct	456 ms	212168 KB	Output is correct
67	Correct	375 ms	212184 KB	Output is correct
68	Correct	348 ms	212252 KB	Output is correct
69	Correct	374 ms	212008 KB	Output is correct
70	Correct	362 ms	211904 KB	Output is correct
71	Correct	321 ms	211156 KB	Output is correct
72	Correct	317 ms	211064 KB	Output is correct
73	Correct	318 ms	211064 KB	Output is correct
74	Correct	322 ms	211056 KB	Output is correct
75	Correct	315 ms	214304 KB	Output is correct
76	Correct	319 ms	214264 KB	Output is correct
77	Correct	340 ms	214344 KB	Output is correct
78	Correct	361 ms	213024 KB	Output is correct
79	Correct	334 ms	212856 KB	Output is correct
80	Correct	1708 ms	355352 KB	Output is correct
81	Correct	1681 ms	353968 KB	Output is correct
82	Correct	1665 ms	353912 KB	Output is correct
83	Correct	1788 ms	353820 KB	Output is correct
84	Correct	1686 ms	353824 KB	Output is correct
85	Correct	1654 ms	353784 KB	Output is correct
86	Correct	1699 ms	353784 KB	Output is correct
87	Correct	1397 ms	366044 KB	Output is correct
88	Correct	1470 ms	334696 KB	Output is correct
89	Correct	1828 ms	335548 KB	Output is correct
90	Correct	1785 ms	335616 KB	Output is correct
91	Correct	1814 ms	335824 KB	Output is correct
92	Correct	1659 ms	360344 KB	Output is correct
93	Correct	1406 ms	358336 KB	Output is correct
94	Correct	1586 ms	357456 KB	Output is correct
95	Correct	1652 ms	354644 KB	Output is correct
96	Correct	1661 ms	353968 KB	Output is correct
97	Correct	1624 ms	357196 KB	Output is correct
98	Correct	1613 ms	354616 KB	Output is correct
99	Correct	1633 ms	353932 KB	Output is correct
100	Correct	3147 ms	346860 KB	Output is correct
101	Correct	3418 ms	346308 KB	Output is correct
102	Correct	1796 ms	346400 KB	Output is correct
103	Correct	1773 ms	346516 KB	Output is correct
104	Correct	1765 ms	343512 KB	Output is correct
105	Correct	1785 ms	343412 KB	Output is correct
106	Correct	1518 ms	335108 KB	Output is correct
107	Correct	1505 ms	334688 KB	Output is correct
108	Correct	1507 ms	334712 KB	Output is correct
109	Correct	1562 ms	334768 KB	Output is correct
110	Correct	1486 ms	366756 KB	Output is correct
111	Correct	1457 ms	366660 KB	Output is correct
112	Correct	1452 ms	366712 KB	Output is correct
113	Correct	1768 ms	352436 KB	Output is correct
114	Correct	1720 ms	352584 KB	Output is correct

Submission #132111

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