oj.uz

Submission #388857

# Submission time Handle Problem Language Result Execution time Memory
388857 2021-04-13T08:01:43 Z huangqr Joker (BOI20_joker) C++14
14 / 100
 2000 ms 262148 KB 
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pl;
typedef pair<ll,pl> ppl;
const ll lim=4e5+5;
ll par[lim],rnk[lim],rel[lim];
ll parcpy[lim],rnkcpy[lim],relcpy[lim];
 
struct xystate{
	ll x,parx,relx,rnkx;
	ll y,pary,rely,rnky;
	xystate(ll ix,ll iparx,ll irelx,ll irnkx,
	ll iy,ll ipary,ll irely,ll irnky){
		x=ix,parx=iparx,relx=irelx,rnkx=irnkx;
		y=iy,pary=ipary,rely=irely,rnky=irnky;
	}
};

vector<xystate>sv;
 
pl findset(ll par[],ll rel[],ll x){
	ll cur=0,og=x;
	while(x!=par[x]){
		if(rel[x])cur=1-cur;
		x=par[x];
	}
//	par[og]=x;
//	rel[og]=cur;
	return {x,cur};
}
 
void mergeset(ll par[],ll rnk[],ll rel[],ll x,ll y){
	pl px=findset(par,rel,x),py=findset(par,rel,y);
	x=px.first,y=py.first;
	if(x==y)return;
	if(rnk[x]>rnk[y])swap(x,y);
	sv.push_back(xystate(x,par[x],rel[x],rnk[x],y,par[y],rel[y],rnk[y]));
	if(rnk[x]==rnk[y])rnk[y]++;
	par[x]=y;
	rnk[y]++;
	rel[x]=(px.second==py.second);
	return;
}
 
int main(){
	ios_base::sync_with_stdio(0),cin.tie(NULL);
	ll n,m,q;
	cin>>n>>m>>q;
	for(int i=1;i<=n;i++)par[i]=i;
	vector<pl>v;
	vector<pl>qs[lim];
	for(int i=0;i<m;i++){
		ll a,b;
		cin>>a>>b;
		v.emplace_back(a,b);
	}	
	//v.emplace_back(0,0);
	bool ans[lim],cfa=0;
	fill(ans,ans+lim,0);
	for(int i=0;i<q;i++){
		ll a,b;
		cin>>a>>b;
		b--,b++;//b is the minimum index that can be used on the right side
		qs[b].emplace_back(a,i);
	}
	for(int i=m;i>=m;i--){
		sort(qs[i].begin(),qs[i].end());
		for(int i=1;i<=n;i++)parcpy[i]=par[i],rnkcpy[i]=rnk[i],relcpy[i]=rel[i];
		ll cur=0;
		bool oddc=0;
		for(auto x:qs[i]){
			if(oddc==1){
				ans[x.second]=1;
				continue;
			}
			for(;cur+1<x.first;cur++){
				pl x=findset(parcpy,relcpy,v[cur].first),y=findset(parcpy,relcpy,v[cur].second);
				if(x.first==y.first){
				if(x.second==y.second){
					oddc=1;
				}
			}
				else mergeset(parcpy,rnkcpy,relcpy,v[cur].first,v[cur].second);
			}
			ans[x.second]=oddc;
			
		}
	}
	
	for(int i=m-1;i>=1;i--){
		if(cfa==1){
			for(auto x:qs[i])ans[x.second]=1;
			continue;
		}
		pl x=findset(par,rel,v[i].first),y=findset(par,rel,v[i].second);
		if(x.first==y.first){
			if(x.second==y.second){
				cfa=1;
			}
		}
		else mergeset(par,rnk,rel,v[i].first,v[i].second);
 
		if(qs[i].empty())continue;
		if(cfa==1){
			for(auto x:qs[i])ans[x.second]=1;
			continue;
		}
		
		sort(qs[i].begin(),qs[i].end());
		for(int i=1;i<=n;i++)parcpy[i]=par[i],rnkcpy[i]=rnk[i],relcpy[i]=rel[i];
		ll cur=0;
		bool oddc=0;
		for(auto x:qs[i]){
			if(oddc==1){
				ans[x.second]=1;
				continue;
			}
			for(;cur+1<x.first;cur++){
				pl x=findset(parcpy,relcpy,v[cur].first),y=findset(parcpy,relcpy,v[cur].second);
				if(x.first==y.first){
					if(x.second==y.second){
						oddc=1;
					}
				}
				else mergeset(parcpy,rnkcpy,relcpy,v[cur].first,v[cur].second);
			}
			ans[x.second]=oddc;
			
		}
	}
	for(int i=0;i<q;i++){
		if(ans[i])cout<<"YES\n";
		else cout<<"NO\n";
	}
	return 0;
}

Compilation message

Joker.cpp: In function 'pl findset(ll*, ll*, ll)':
Joker.cpp:23:11: warning: unused variable 'og' [-Wunused-variable]
   23 |  ll cur=0,og=x;
      |           ^~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 10060 KB Output is correct
2 Correct 7 ms 10060 KB Output is correct
3 Correct 7 ms 10060 KB Output is correct
4 Correct 6 ms 10060 KB Output is correct
5 Correct 6 ms 10060 KB Output is correct
6 Correct 6 ms 10060 KB Output is correct
7 Correct 9 ms 10700 KB Output is correct
8 Correct 9 ms 10704 KB Output is correct
9 Correct 7 ms 10448 KB Output is correct
10 Correct 8 ms 10444 KB Output is correct
11 Correct 7 ms 10748 KB Output is correct
12 Correct 7 ms 10704 KB Output is correct
13 Correct 8 ms 10428 KB Output is correct
14 Correct 9 ms 11212 KB Output is correct
15 Correct 9 ms 11268 KB Output is correct
16 Correct 8 ms 10440 KB Output is correct
17 Correct 7 ms 10444 KB Output is correct
18 Correct 7 ms 10448 KB Output is correct
19 Correct 6 ms 10448 KB Output is correct
20 Correct 7 ms 10316 KB Output is correct
21 Correct 7 ms 10448 KB Output is correct
22 Correct 7 ms 10704 KB Output is correct
23 Correct 7 ms 10444 KB Output is correct
24 Correct 7 ms 10448 KB Output is correct
25 Correct 7 ms 10448 KB Output is correct
26 Correct 7 ms 10316 KB Output is correct
27 Correct 7 ms 10448 KB Output is correct
28 Correct 7 ms 10796 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 10060 KB Output is correct
2 Correct 7 ms 10060 KB Output is correct
3 Correct 7 ms 10060 KB Output is correct
4 Correct 6 ms 10060 KB Output is correct
5 Correct 6 ms 10060 KB Output is correct
6 Correct 6 ms 10060 KB Output is correct
7 Correct 9 ms 10700 KB Output is correct
8 Correct 9 ms 10704 KB Output is correct
9 Correct 7 ms 10448 KB Output is correct
10 Correct 8 ms 10444 KB Output is correct
11 Correct 7 ms 10748 KB Output is correct
12 Correct 7 ms 10704 KB Output is correct
13 Correct 8 ms 10428 KB Output is correct
14 Correct 9 ms 11212 KB Output is correct
15 Correct 9 ms 11268 KB Output is correct
16 Correct 8 ms 10440 KB Output is correct
17 Correct 7 ms 10444 KB Output is correct
18 Correct 7 ms 10448 KB Output is correct
19 Correct 6 ms 10448 KB Output is correct
20 Correct 7 ms 10316 KB Output is correct
21 Correct 7 ms 10448 KB Output is correct
22 Correct 7 ms 10704 KB Output is correct
23 Correct 7 ms 10444 KB Output is correct
24 Correct 7 ms 10448 KB Output is correct
25 Correct 7 ms 10448 KB Output is correct
26 Correct 7 ms 10316 KB Output is correct
27 Correct 7 ms 10448 KB Output is correct
28 Correct 7 ms 10796 KB Output is correct
29 Correct 49 ms 43240 KB Output is correct
30 Correct 49 ms 43312 KB Output is correct
31 Correct 52 ms 43256 KB Output is correct
32 Correct 34 ms 26796 KB Output is correct
33 Correct 20 ms 18524 KB Output is correct
34 Correct 51 ms 43176 KB Output is correct
35 Correct 58 ms 43228 KB Output is correct
36 Correct 32 ms 26812 KB Output is correct
37 Correct 81 ms 76044 KB Output is correct
38 Correct 157 ms 141732 KB Output is correct
39 Correct 30 ms 26784 KB Output is correct
40 Correct 32 ms 26732 KB Output is correct
41 Correct 31 ms 26832 KB Output is correct
42 Correct 31 ms 26804 KB Output is correct
43 Correct 44 ms 26756 KB Output is correct
44 Correct 63 ms 43144 KB Output is correct
45 Correct 89 ms 76080 KB Output is correct
46 Correct 102 ms 76008 KB Output is correct
47 Correct 32 ms 26824 KB Output is correct
48 Correct 36 ms 26720 KB Output is correct
49 Correct 50 ms 43248 KB Output is correct
50 Correct 49 ms 43200 KB Output is correct
51 Correct 27 ms 18508 KB Output is correct
52 Correct 38 ms 26820 KB Output is correct
53 Correct 51 ms 43228 KB Output is correct
54 Correct 56 ms 43288 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 10060 KB Output is correct
2 Correct 7 ms 10060 KB Output is correct
3 Execution timed out 2085 ms 24016 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 10060 KB Output is correct
2 Correct 7 ms 10060 KB Output is correct
3 Correct 7 ms 10060 KB Output is correct
4 Correct 6 ms 10060 KB Output is correct
5 Correct 6 ms 10060 KB Output is correct
6 Correct 6 ms 10060 KB Output is correct
7 Correct 9 ms 10700 KB Output is correct
8 Correct 9 ms 10704 KB Output is correct
9 Correct 7 ms 10448 KB Output is correct
10 Correct 8 ms 10444 KB Output is correct
11 Correct 7 ms 10748 KB Output is correct
12 Correct 7 ms 10704 KB Output is correct
13 Correct 8 ms 10428 KB Output is correct
14 Correct 9 ms 11212 KB Output is correct
15 Correct 9 ms 11268 KB Output is correct
16 Correct 8 ms 10440 KB Output is correct
17 Correct 7 ms 10444 KB Output is correct
18 Correct 7 ms 10448 KB Output is correct
19 Correct 6 ms 10448 KB Output is correct
20 Correct 7 ms 10316 KB Output is correct
21 Correct 7 ms 10448 KB Output is correct
22 Correct 7 ms 10704 KB Output is correct
23 Correct 7 ms 10444 KB Output is correct
24 Correct 7 ms 10448 KB Output is correct
25 Correct 7 ms 10448 KB Output is correct
26 Correct 7 ms 10316 KB Output is correct
27 Correct 7 ms 10448 KB Output is correct
28 Correct 7 ms 10796 KB Output is correct
29 Execution timed out 2085 ms 24016 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 10060 KB Output is correct
2 Correct 7 ms 10060 KB Output is correct
3 Correct 7 ms 10060 KB Output is correct
4 Correct 6 ms 10060 KB Output is correct
5 Correct 6 ms 10060 KB Output is correct
6 Correct 6 ms 10060 KB Output is correct
7 Correct 9 ms 10700 KB Output is correct
8 Correct 9 ms 10704 KB Output is correct
9 Correct 7 ms 10448 KB Output is correct
10 Correct 8 ms 10444 KB Output is correct
11 Correct 7 ms 10748 KB Output is correct
12 Correct 7 ms 10704 KB Output is correct
13 Correct 8 ms 10428 KB Output is correct
14 Correct 9 ms 11212 KB Output is correct
15 Correct 9 ms 11268 KB Output is correct
16 Correct 8 ms 10440 KB Output is correct
17 Correct 7 ms 10444 KB Output is correct
18 Correct 7 ms 10448 KB Output is correct
19 Correct 6 ms 10448 KB Output is correct
20 Correct 7 ms 10316 KB Output is correct
21 Correct 7 ms 10448 KB Output is correct
22 Correct 7 ms 10704 KB Output is correct
23 Correct 7 ms 10444 KB Output is correct
24 Correct 7 ms 10448 KB Output is correct
25 Correct 7 ms 10448 KB Output is correct
26 Correct 7 ms 10316 KB Output is correct
27 Correct 7 ms 10448 KB Output is correct
28 Correct 7 ms 10796 KB Output is correct
29 Correct 49 ms 43240 KB Output is correct
30 Correct 49 ms 43312 KB Output is correct
31 Correct 52 ms 43256 KB Output is correct
32 Correct 34 ms 26796 KB Output is correct
33 Correct 20 ms 18524 KB Output is correct
34 Correct 51 ms 43176 KB Output is correct
35 Correct 58 ms 43228 KB Output is correct
36 Correct 32 ms 26812 KB Output is correct
37 Correct 81 ms 76044 KB Output is correct
38 Correct 157 ms 141732 KB Output is correct
39 Correct 30 ms 26784 KB Output is correct
40 Correct 32 ms 26732 KB Output is correct
41 Correct 31 ms 26832 KB Output is correct
42 Correct 31 ms 26804 KB Output is correct
43 Correct 44 ms 26756 KB Output is correct
44 Correct 63 ms 43144 KB Output is correct
45 Correct 89 ms 76080 KB Output is correct
46 Correct 102 ms 76008 KB Output is correct
47 Correct 32 ms 26824 KB Output is correct
48 Correct 36 ms 26720 KB Output is correct
49 Correct 50 ms 43248 KB Output is correct
50 Correct 49 ms 43200 KB Output is correct
51 Correct 27 ms 18508 KB Output is correct
52 Correct 38 ms 26820 KB Output is correct
53 Correct 51 ms 43228 KB Output is correct
54 Correct 56 ms 43288 KB Output is correct
55 Runtime error 347 ms 262148 KB Execution killed with signal 9
56 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 10060 KB Output is correct
2 Correct 7 ms 10060 KB Output is correct
3 Correct 7 ms 10060 KB Output is correct
4 Correct 6 ms 10060 KB Output is correct
5 Correct 6 ms 10060 KB Output is correct
6 Correct 6 ms 10060 KB Output is correct
7 Correct 9 ms 10700 KB Output is correct
8 Correct 9 ms 10704 KB Output is correct
9 Correct 7 ms 10448 KB Output is correct
10 Correct 8 ms 10444 KB Output is correct
11 Correct 7 ms 10748 KB Output is correct
12 Correct 7 ms 10704 KB Output is correct
13 Correct 8 ms 10428 KB Output is correct
14 Correct 9 ms 11212 KB Output is correct
15 Correct 9 ms 11268 KB Output is correct
16 Correct 8 ms 10440 KB Output is correct
17 Correct 7 ms 10444 KB Output is correct
18 Correct 7 ms 10448 KB Output is correct
19 Correct 6 ms 10448 KB Output is correct
20 Correct 7 ms 10316 KB Output is correct
21 Correct 7 ms 10448 KB Output is correct
22 Correct 7 ms 10704 KB Output is correct
23 Correct 7 ms 10444 KB Output is correct
24 Correct 7 ms 10448 KB Output is correct
25 Correct 7 ms 10448 KB Output is correct
26 Correct 7 ms 10316 KB Output is correct
27 Correct 7 ms 10448 KB Output is correct
28 Correct 7 ms 10796 KB Output is correct
29 Correct 49 ms 43240 KB Output is correct
30 Correct 49 ms 43312 KB Output is correct
31 Correct 52 ms 43256 KB Output is correct
32 Correct 34 ms 26796 KB Output is correct
33 Correct 20 ms 18524 KB Output is correct
34 Correct 51 ms 43176 KB Output is correct
35 Correct 58 ms 43228 KB Output is correct
36 Correct 32 ms 26812 KB Output is correct
37 Correct 81 ms 76044 KB Output is correct
38 Correct 157 ms 141732 KB Output is correct
39 Correct 30 ms 26784 KB Output is correct
40 Correct 32 ms 26732 KB Output is correct
41 Correct 31 ms 26832 KB Output is correct
42 Correct 31 ms 26804 KB Output is correct
43 Correct 44 ms 26756 KB Output is correct
44 Correct 63 ms 43144 KB Output is correct
45 Correct 89 ms 76080 KB Output is correct
46 Correct 102 ms 76008 KB Output is correct
47 Correct 32 ms 26824 KB Output is correct
48 Correct 36 ms 26720 KB Output is correct
49 Correct 50 ms 43248 KB Output is correct
50 Correct 49 ms 43200 KB Output is correct
51 Correct 27 ms 18508 KB Output is correct
52 Correct 38 ms 26820 KB Output is correct
53 Correct 51 ms 43228 KB Output is correct
54 Correct 56 ms 43288 KB Output is correct
55 Execution timed out 2085 ms 24016 KB Time limit exceeded
56 Halted 0 ms 0 KB -