oj.uz

Submission #893170

# Submission time Handle Problem Language Result Execution time Memory
893170 2023-12-26T15:29:32 Z amirhoseinfar1385 Joker (BOI20_joker) C++17
100 / 100
 150 ms 7368 KB 
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2")
#include<bits/stdc++.h>
using namespace std;
const int maxn=200000+10;
int n,m,q,dp[maxn],f;
pair<int,int>alle[maxn];

struct dsu{
	vector<int>ha;
	int par[maxn],sz[maxn],val[maxn];
	dsu(){
		for(int i=0;i<maxn;i++){
			par[i]=i;
			sz[i]=1;
		}
	}
	int root(int u){
		if(par[u]==u){
			return u;
		}
		return root(par[u]);
	}
	int len(int u){
		if(u==par[u]){
			return 0;
		}
		return len(par[u])+val[u];
	}

	void con(int u,int v){
		int rootu=root(u),rootv=root(v);
		if(rootu!=rootv){
			if(sz[rootu]<sz[rootv]){
				swap(rootu,rootv);
				swap(u,v);
			}
			int lu=len(u),lv=len(v);
			par[rootv]=rootu;
			sz[rootu]+=sz[rootv];
			if((lu&1)==(lv&1)){
				val[rootv]=1;
			}
			else{
				val[rootv]=0;
			}
			ha.push_back(rootv);
			return ;
		}
		ha.push_back(-1);
	}
	bool two(int u,int v){
		int rootu=root(u),rootv=root(v);
		if(rootu!=rootv){
			return 0;
		}
		int lu=len(u),lv=len(v);
		if((lu&1)==(lv&1)){
			return 1;
		}
		return 0;
	}
	void back(){
		if((int)ha.back()==-1){
			ha.pop_back();
			return ;
		}
		int x=ha.back();
		sz[par[x]]-=sz[x];
		par[x]=x;
		val[x]=0;
		ha.pop_back();
		return ;
	}
}ds;

void solve(int l,int r,int tl,int tr){
	if(l>r){
		return ;
	}
	if(tl==tr){
		for(int i=l;i<=r;i++){
			dp[i]=tl;
		}
		return ;
	}
	int opt=0;
	int now=ds.ha.size();
	int mid=(l+r)>>1;
	for(int i=l;i<=mid;i++){
		ds.con(alle[i].first,alle[i].second);
	}
	for(int i=tr;i>=tl;i--){
		if(ds.two(alle[i].first,alle[i].second)){
			opt=i;
			break;
		}
		ds.con(alle[i].first,alle[i].second);
	}
	dp[mid]=opt;
	while((int)ds.ha.size()>now){
		ds.back();
	}
	for(int i=l;i<=mid;i++){
		ds.con(alle[i].first,alle[i].second);
	}
	solve(mid+1,r,opt,tr);
	while((int)ds.ha.size()>now){
		ds.back();
	}
	for(int i=tr;i>opt;i--){
		ds.con(alle[i].first,alle[i].second);
	}
	solve(l,mid-1,tl,opt);
	while((int)ds.ha.size()>now){
		ds.back();
	}
}

int pre(){
	for(int i=1;i<=m;i++){
		if(ds.two(alle[i].first,alle[i].second)){
			return i;
		}
		ds.con(alle[i].first,alle[i].second);
	}
	return m+1;
}

int suf(){
	for(int i=m;i>=0;i--){
		if(ds.two(alle[i].first,alle[i].second)){
			return i;
		}
		ds.con(alle[i].first,alle[i].second);
	}
	return 0;
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);	
	cin>>n>>m>>q;
	for(int i=1;i<=m;i++){
		cin>>alle[i].first>>alle[i].second;
	}
	int ind=pre();
	while((int)ds.ha.size()>0){
		ds.back();
	}
	solve(1,ind-1,0,m);
	for(int i=ind;i<=m;i++){
		dp[i]=m+2;
	}
	if((int)ds.ha.size()!=0){
		assert(0);
	}
	dp[0]=suf();
	for(int i=0;i<q;i++){
		int l,r;
		cin>>l>>r;
		if(dp[l-1]<=r){
			cout<<"NO\n";
		}
		else{
			cout<<"YES\n";
		}
	}
}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4696 KB Output is correct
2 Correct 1 ms 4700 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 1 ms 4700 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct
6 Correct 1 ms 4700 KB Output is correct
7 Correct 1 ms 4700 KB Output is correct
8 Correct 1 ms 4700 KB Output is correct
9 Correct 1 ms 4700 KB Output is correct
10 Correct 1 ms 4700 KB Output is correct
11 Correct 1 ms 4700 KB Output is correct
12 Correct 1 ms 4700 KB Output is correct
13 Correct 1 ms 4700 KB Output is correct
14 Correct 1 ms 4700 KB Output is correct
15 Correct 1 ms 4700 KB Output is correct
16 Correct 1 ms 4700 KB Output is correct
17 Correct 1 ms 4852 KB Output is correct
18 Correct 1 ms 4700 KB Output is correct
19 Correct 1 ms 4700 KB Output is correct
20 Correct 1 ms 4700 KB Output is correct
21 Correct 1 ms 4700 KB Output is correct
22 Correct 1 ms 4700 KB Output is correct
23 Correct 1 ms 4700 KB Output is correct
24 Correct 1 ms 4700 KB Output is correct
25 Correct 1 ms 4532 KB Output is correct
26 Correct 1 ms 4700 KB Output is correct
27 Correct 1 ms 4700 KB Output is correct
28 Correct 1 ms 4700 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4696 KB Output is correct
2 Correct 1 ms 4700 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 1 ms 4700 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct
6 Correct 1 ms 4700 KB Output is correct
7 Correct 1 ms 4700 KB Output is correct
8 Correct 1 ms 4700 KB Output is correct
9 Correct 1 ms 4700 KB Output is correct
10 Correct 1 ms 4700 KB Output is correct
11 Correct 1 ms 4700 KB Output is correct
12 Correct 1 ms 4700 KB Output is correct
13 Correct 1 ms 4700 KB Output is correct
14 Correct 1 ms 4700 KB Output is correct
15 Correct 1 ms 4700 KB Output is correct
16 Correct 1 ms 4700 KB Output is correct
17 Correct 1 ms 4852 KB Output is correct
18 Correct 1 ms 4700 KB Output is correct
19 Correct 1 ms 4700 KB Output is correct
20 Correct 1 ms 4700 KB Output is correct
21 Correct 1 ms 4700 KB Output is correct
22 Correct 1 ms 4700 KB Output is correct
23 Correct 1 ms 4700 KB Output is correct
24 Correct 1 ms 4700 KB Output is correct
25 Correct 1 ms 4532 KB Output is correct
26 Correct 1 ms 4700 KB Output is correct
27 Correct 1 ms 4700 KB Output is correct
28 Correct 1 ms 4700 KB Output is correct
29 Correct 1 ms 4700 KB Output is correct
30 Correct 2 ms 4700 KB Output is correct
31 Correct 2 ms 4732 KB Output is correct
32 Correct 1 ms 4700 KB Output is correct
33 Correct 1 ms 4700 KB Output is correct
34 Correct 2 ms 4700 KB Output is correct
35 Correct 2 ms 4696 KB Output is correct
36 Correct 1 ms 4700 KB Output is correct
37 Correct 2 ms 4700 KB Output is correct
38 Correct 2 ms 4700 KB Output is correct
39 Correct 2 ms 4700 KB Output is correct
40 Correct 1 ms 4700 KB Output is correct
41 Correct 1 ms 4700 KB Output is correct
42 Correct 1 ms 4700 KB Output is correct
43 Correct 2 ms 4700 KB Output is correct
44 Correct 2 ms 4700 KB Output is correct
45 Correct 2 ms 4700 KB Output is correct
46 Correct 2 ms 4696 KB Output is correct
47 Correct 2 ms 4700 KB Output is correct
48 Correct 2 ms 4700 KB Output is correct
49 Correct 1 ms 4700 KB Output is correct
50 Correct 2 ms 4700 KB Output is correct
51 Correct 2 ms 4696 KB Output is correct
52 Correct 2 ms 4700 KB Output is correct
53 Correct 2 ms 4700 KB Output is correct
54 Correct 2 ms 4700 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4696 KB Output is correct
2 Correct 1 ms 4700 KB Output is correct
3 Correct 109 ms 6064 KB Output is correct
4 Correct 127 ms 7368 KB Output is correct
5 Correct 78 ms 6408 KB Output is correct
6 Correct 76 ms 6064 KB Output is correct
7 Correct 75 ms 6252 KB Output is correct
8 Correct 103 ms 6356 KB Output is correct
9 Correct 105 ms 6260 KB Output is correct
10 Correct 129 ms 6352 KB Output is correct
11 Correct 110 ms 6052 KB Output is correct
12 Correct 110 ms 6344 KB Output is correct
13 Correct 96 ms 6228 KB Output is correct
14 Correct 102 ms 6128 KB Output is correct
15 Correct 146 ms 6248 KB Output is correct
16 Correct 130 ms 6076 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4696 KB Output is correct
2 Correct 1 ms 4700 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 1 ms 4700 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct
6 Correct 1 ms 4700 KB Output is correct
7 Correct 1 ms 4700 KB Output is correct
8 Correct 1 ms 4700 KB Output is correct
9 Correct 1 ms 4700 KB Output is correct
10 Correct 1 ms 4700 KB Output is correct
11 Correct 1 ms 4700 KB Output is correct
12 Correct 1 ms 4700 KB Output is correct
13 Correct 1 ms 4700 KB Output is correct
14 Correct 1 ms 4700 KB Output is correct
15 Correct 1 ms 4700 KB Output is correct
16 Correct 1 ms 4700 KB Output is correct
17 Correct 1 ms 4852 KB Output is correct
18 Correct 1 ms 4700 KB Output is correct
19 Correct 1 ms 4700 KB Output is correct
20 Correct 1 ms 4700 KB Output is correct
21 Correct 1 ms 4700 KB Output is correct
22 Correct 1 ms 4700 KB Output is correct
23 Correct 1 ms 4700 KB Output is correct
24 Correct 1 ms 4700 KB Output is correct
25 Correct 1 ms 4532 KB Output is correct
26 Correct 1 ms 4700 KB Output is correct
27 Correct 1 ms 4700 KB Output is correct
28 Correct 1 ms 4700 KB Output is correct
29 Correct 109 ms 6064 KB Output is correct
30 Correct 127 ms 7368 KB Output is correct
31 Correct 78 ms 6408 KB Output is correct
32 Correct 76 ms 6064 KB Output is correct
33 Correct 75 ms 6252 KB Output is correct
34 Correct 103 ms 6356 KB Output is correct
35 Correct 105 ms 6260 KB Output is correct
36 Correct 129 ms 6352 KB Output is correct
37 Correct 110 ms 6052 KB Output is correct
38 Correct 110 ms 6344 KB Output is correct
39 Correct 96 ms 6228 KB Output is correct
40 Correct 102 ms 6128 KB Output is correct
41 Correct 146 ms 6248 KB Output is correct
42 Correct 130 ms 6076 KB Output is correct
43 Correct 111 ms 6052 KB Output is correct
44 Correct 142 ms 7220 KB Output is correct
45 Correct 120 ms 6596 KB Output is correct
46 Correct 90 ms 6132 KB Output is correct
47 Correct 86 ms 6120 KB Output is correct
48 Correct 114 ms 6284 KB Output is correct
49 Correct 129 ms 6352 KB Output is correct
50 Correct 121 ms 6100 KB Output is correct
51 Correct 111 ms 6284 KB Output is correct
52 Correct 119 ms 6112 KB Output is correct
53 Correct 98 ms 6128 KB Output is correct
54 Correct 111 ms 6304 KB Output is correct
55 Correct 131 ms 6128 KB Output is correct
56 Correct 128 ms 6284 KB Output is correct

Subtask #5
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4696 KB Output is correct
2 Correct 1 ms 4700 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 1 ms 4700 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct
6 Correct 1 ms 4700 KB Output is correct
7 Correct 1 ms 4700 KB Output is correct
8 Correct 1 ms 4700 KB Output is correct
9 Correct 1 ms 4700 KB Output is correct
10 Correct 1 ms 4700 KB Output is correct
11 Correct 1 ms 4700 KB Output is correct
12 Correct 1 ms 4700 KB Output is correct
13 Correct 1 ms 4700 KB Output is correct
14 Correct 1 ms 4700 KB Output is correct
15 Correct 1 ms 4700 KB Output is correct
16 Correct 1 ms 4700 KB Output is correct
17 Correct 1 ms 4852 KB Output is correct
18 Correct 1 ms 4700 KB Output is correct
19 Correct 1 ms 4700 KB Output is correct
20 Correct 1 ms 4700 KB Output is correct
21 Correct 1 ms 4700 KB Output is correct
22 Correct 1 ms 4700 KB Output is correct
23 Correct 1 ms 4700 KB Output is correct
24 Correct 1 ms 4700 KB Output is correct
25 Correct 1 ms 4532 KB Output is correct
26 Correct 1 ms 4700 KB Output is correct
27 Correct 1 ms 4700 KB Output is correct
28 Correct 1 ms 4700 KB Output is correct
29 Correct 1 ms 4700 KB Output is correct
30 Correct 2 ms 4700 KB Output is correct
31 Correct 2 ms 4732 KB Output is correct
32 Correct 1 ms 4700 KB Output is correct
33 Correct 1 ms 4700 KB Output is correct
34 Correct 2 ms 4700 KB Output is correct
35 Correct 2 ms 4696 KB Output is correct
36 Correct 1 ms 4700 KB Output is correct
37 Correct 2 ms 4700 KB Output is correct
38 Correct 2 ms 4700 KB Output is correct
39 Correct 2 ms 4700 KB Output is correct
40 Correct 1 ms 4700 KB Output is correct
41 Correct 1 ms 4700 KB Output is correct
42 Correct 1 ms 4700 KB Output is correct
43 Correct 2 ms 4700 KB Output is correct
44 Correct 2 ms 4700 KB Output is correct
45 Correct 2 ms 4700 KB Output is correct
46 Correct 2 ms 4696 KB Output is correct
47 Correct 2 ms 4700 KB Output is correct
48 Correct 2 ms 4700 KB Output is correct
49 Correct 1 ms 4700 KB Output is correct
50 Correct 2 ms 4700 KB Output is correct
51 Correct 2 ms 4696 KB Output is correct
52 Correct 2 ms 4700 KB Output is correct
53 Correct 2 ms 4700 KB Output is correct
54 Correct 2 ms 4700 KB Output is correct
55 Correct 86 ms 5540 KB Output is correct
56 Correct 99 ms 6900 KB Output is correct
57 Correct 49 ms 5844 KB Output is correct
58 Correct 49 ms 5592 KB Output is correct
59 Correct 83 ms 5588 KB Output is correct
60 Correct 105 ms 5536 KB Output is correct
61 Correct 92 ms 5588 KB Output is correct
62 Correct 96 ms 5600 KB Output is correct
63 Correct 69 ms 5836 KB Output is correct
64 Correct 93 ms 5504 KB Output is correct
65 Correct 113 ms 5580 KB Output is correct

Subtask #6
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4696 KB Output is correct
2 Correct 1 ms 4700 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 1 ms 4700 KB Output is correct
5 Correct 1 ms 4700 KB Output is correct
6 Correct 1 ms 4700 KB Output is correct
7 Correct 1 ms 4700 KB Output is correct
8 Correct 1 ms 4700 KB Output is correct
9 Correct 1 ms 4700 KB Output is correct
10 Correct 1 ms 4700 KB Output is correct
11 Correct 1 ms 4700 KB Output is correct
12 Correct 1 ms 4700 KB Output is correct
13 Correct 1 ms 4700 KB Output is correct
14 Correct 1 ms 4700 KB Output is correct
15 Correct 1 ms 4700 KB Output is correct
16 Correct 1 ms 4700 KB Output is correct
17 Correct 1 ms 4852 KB Output is correct
18 Correct 1 ms 4700 KB Output is correct
19 Correct 1 ms 4700 KB Output is correct
20 Correct 1 ms 4700 KB Output is correct
21 Correct 1 ms 4700 KB Output is correct
22 Correct 1 ms 4700 KB Output is correct
23 Correct 1 ms 4700 KB Output is correct
24 Correct 1 ms 4700 KB Output is correct
25 Correct 1 ms 4532 KB Output is correct
26 Correct 1 ms 4700 KB Output is correct
27 Correct 1 ms 4700 KB Output is correct
28 Correct 1 ms 4700 KB Output is correct
29 Correct 1 ms 4700 KB Output is correct
30 Correct 2 ms 4700 KB Output is correct
31 Correct 2 ms 4732 KB Output is correct
32 Correct 1 ms 4700 KB Output is correct
33 Correct 1 ms 4700 KB Output is correct
34 Correct 2 ms 4700 KB Output is correct
35 Correct 2 ms 4696 KB Output is correct
36 Correct 1 ms 4700 KB Output is correct
37 Correct 2 ms 4700 KB Output is correct
38 Correct 2 ms 4700 KB Output is correct
39 Correct 2 ms 4700 KB Output is correct
40 Correct 1 ms 4700 KB Output is correct
41 Correct 1 ms 4700 KB Output is correct
42 Correct 1 ms 4700 KB Output is correct
43 Correct 2 ms 4700 KB Output is correct
44 Correct 2 ms 4700 KB Output is correct
45 Correct 2 ms 4700 KB Output is correct
46 Correct 2 ms 4696 KB Output is correct
47 Correct 2 ms 4700 KB Output is correct
48 Correct 2 ms 4700 KB Output is correct
49 Correct 1 ms 4700 KB Output is correct
50 Correct 2 ms 4700 KB Output is correct
51 Correct 2 ms 4696 KB Output is correct
52 Correct 2 ms 4700 KB Output is correct
53 Correct 2 ms 4700 KB Output is correct
54 Correct 2 ms 4700 KB Output is correct
55 Correct 109 ms 6064 KB Output is correct
56 Correct 127 ms 7368 KB Output is correct
57 Correct 78 ms 6408 KB Output is correct
58 Correct 76 ms 6064 KB Output is correct
59 Correct 75 ms 6252 KB Output is correct
60 Correct 103 ms 6356 KB Output is correct
61 Correct 105 ms 6260 KB Output is correct
62 Correct 129 ms 6352 KB Output is correct
63 Correct 110 ms 6052 KB Output is correct
64 Correct 110 ms 6344 KB Output is correct
65 Correct 96 ms 6228 KB Output is correct
66 Correct 102 ms 6128 KB Output is correct
67 Correct 146 ms 6248 KB Output is correct
68 Correct 130 ms 6076 KB Output is correct
69 Correct 111 ms 6052 KB Output is correct
70 Correct 142 ms 7220 KB Output is correct
71 Correct 120 ms 6596 KB Output is correct
72 Correct 90 ms 6132 KB Output is correct
73 Correct 86 ms 6120 KB Output is correct
74 Correct 114 ms 6284 KB Output is correct
75 Correct 129 ms 6352 KB Output is correct
76 Correct 121 ms 6100 KB Output is correct
77 Correct 111 ms 6284 KB Output is correct
78 Correct 119 ms 6112 KB Output is correct
79 Correct 98 ms 6128 KB Output is correct
80 Correct 111 ms 6304 KB Output is correct
81 Correct 131 ms 6128 KB Output is correct
82 Correct 128 ms 6284 KB Output is correct
83 Correct 86 ms 5540 KB Output is correct
84 Correct 99 ms 6900 KB Output is correct
85 Correct 49 ms 5844 KB Output is correct
86 Correct 49 ms 5592 KB Output is correct
87 Correct 83 ms 5588 KB Output is correct
88 Correct 105 ms 5536 KB Output is correct
89 Correct 92 ms 5588 KB Output is correct
90 Correct 96 ms 5600 KB Output is correct
91 Correct 69 ms 5836 KB Output is correct
92 Correct 93 ms 5504 KB Output is correct
93 Correct 113 ms 5580 KB Output is correct
94 Correct 114 ms 6352 KB Output is correct
95 Correct 150 ms 6556 KB Output is correct
96 Correct 89 ms 6604 KB Output is correct
97 Correct 76 ms 6348 KB Output is correct
98 Correct 92 ms 6352 KB Output is correct
99 Correct 100 ms 6368 KB Output is correct
100 Correct 101 ms 6352 KB Output is correct
101 Correct 107 ms 6352 KB Output is correct
102 Correct 118 ms 6364 KB Output is correct
103 Correct 126 ms 6352 KB Output is correct
104 Correct 100 ms 6352 KB Output is correct
105 Correct 124 ms 6356 KB Output is correct
106 Correct 139 ms 6356 KB Output is correct
107 Correct 60 ms 6604 KB Output is correct
108 Correct 108 ms 6128 KB Output is correct
109 Correct 109 ms 6096 KB Output is correct
110 Correct 114 ms 6132 KB Output is correct
111 Correct 107 ms 6100 KB Output is correct
112 Correct 107 ms 6052 KB Output is correct
113 Correct 109 ms 6044 KB Output is correct
114 Correct 107 ms 6356 KB Output is correct
115 Correct 105 ms 6100 KB Output is correct
116 Correct 114 ms 6136 KB Output is correct