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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#783082#9810. Obliviate, Then ReincarnateFHQY#WA 190ms147072kbC++172.7kb2024-11-25 23:14:072024-11-25 23:14:07

Judging History

This is the latest submission verdict.

  • [2024-11-26 23:19:26]
  • hack成功,自动添加数据
  • (/hack/1260)
  • [2024-11-25 23:14:07]
  • Judged
  • Verdict: WA
  • Time: 190ms
  • Memory: 147072kb
  • [2024-11-25 23:14:07]
  • Submitted

answer

#include<bits/stdc++.h>
#define int long long
#define ll long long
#define endl '\n'
#define fi first
#define se second
#define pii pair<int,int>
using namespace std;
const int N=1e6+5;

int n;
int vis[N],dfn[N],low[N],sk[N],top,num,cnt,col[N];
int viss[N],dis[N],cntt[N];
int in[N],out[N];
bool vs[N],fl[N];
vector<int>e[N],scc[N];
vector<pii>G[N],g[N];
void tarjan(int u){
	vis[sk[++top]=u]=1;
	dfn[u]=low[u]=++num;
	for(auto to:G[u]){
		int v=to.fi;
		if(!dfn[v]){
			tarjan(v);
			low[u]=min(low[u],low[v]);
		}else if(vis[v])
			low[u]=min(low[u],dfn[v]);
	}
	if(dfn[u]==low[u]){
		int v;cnt++;
		do{
			v=sk[top--];
			vis[v]=0;
			col[v]=cnt;
		}while(u!=v);
	}
}
bool spfa(int x,int op,vector<int> p){
	int inf=1e18;
	for(auto now : p)
	{
		viss[now]=0,dis[now]=inf*op;
	}
	dis[x]=0,cntt[x]=0;
	queue<int> q;
	q.push(x);
	while(!q.empty())
	{
		int now = q.front();
		q.pop();
		viss[now]=0;
		for(int i=0;i<g[now].size();i++)
		{
			pair<int,int> s=g[now][i];
			if(col[s.first]!=col[x])continue;
//			cout<<now<<' '<<s.first<<" ff"<<endl;
			if(dis[s.first]>dis[now]+s.second*op)
			{
				dis[s.first]=dis[now]+s.second*op;
				cntt[s.first]=cntt[now]+1;
				if(cntt[now]>=g[now].size()) return true;
				if(!viss[s.first]) viss[s.first]=1,q.push(s.first);
			}
		}
	}
	return false;
}
void solve(){
	cin>>n;
	int m,Q;
	cin>>m>>Q;
	for(int i=1;i<=m;i++)
	{
		int a,b;
		cin>>a>>b;
		if(b==0)
			continue;
		a=(a%n+n)%n;
		G[a+1].push_back({((a+b)%n+n)%n+1,b});
	}
	for(int i=1;i<=n;i++)
		if(!dfn[i])tarjan(i);
	for(int i=1;i<=n;i++)
		scc[col[i]].push_back(i);
	for(int u=1;u<=n;u++){
		for(auto to:G[u]){
			int v=to.fi;
			if(col[u]==col[v])continue;
			in[col[u]]++;
			out[col[v]]++;
			e[col[v]].push_back(col[u]);
		}
	}
	for(int u=1;u<=n;u++){
		for(auto to:G[u]){
			int v=to.fi;
			if(col[u]!=col[v])continue;
			g[u].push_back({v,to.se});
		}
	}
//	for(int i=1;i<=cnt;i++){
//		cout<<"# ";
//		for(auto v:scc[i])
//			cout<<v<<' ';
//		cout<<endl;
//	}
	for(int i=1;i<=n;i++){
		int cl=col[i];
		if(vs[cl])continue;
		vs[cl]=1;
		fl[cl]=spfa(i,1,scc[cl])|spfa(i,-1,scc[cl]);
//		cout<<i<<' '<<cl<<' '<<fl[cl]<<endl;
	}
	//cout<<"DEBUG"<<endl;
	queue<int>q;
	for(int i=1;i<=cnt;i++)
		if(!in[i])q.push(i);
	while(q.size()){
		int u=q.front();q.pop();
		for(auto v:e[u]){
			fl[v]|=fl[u];
			if(!--in[v])q.push(v);
		}
	}
	while(Q--){
		int x;
		cin>>x;
		x=(x%n+n)%n+1;
		if(fl[col[x]])cout<<"Yes"<<endl;
		else cout<<"No"<<endl;
	}
	return ;
}
int T=1;

signed main(){
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
//	cin>>T;
	for(int kase=1;kase<=T;kase++){
		solve();
	}
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 8ms
memory: 114268kb

input:

3 2 3
1 1
-1 3
1
2
3

output:

Yes
Yes
No

result:

ok 3 tokens

Test #2:

score: 0
Accepted
time: 15ms
memory: 114968kb

input:

3 2 3
1 1
-1 0
1
2
3

output:

No
No
No

result:

ok 3 tokens

Test #3:

score: 0
Accepted
time: 19ms
memory: 111024kb

input:

1 1 1
0 1000000000
-1000000000

output:

Yes

result:

ok "Yes"

Test #4:

score: 0
Accepted
time: 12ms
memory: 111344kb

input:

3 2 3
0 1000000000
1 -1000000000
-1000000000
0
-1000000000

output:

No
No
No

result:

ok 3 tokens

Test #5:

score: -100
Wrong Answer
time: 190ms
memory: 147072kb

input:

50134 500000 500000
-154428638 -283522863
-186373509 -327130969
154999046 46750274
-933523447 349415487
-437683609 140099255
864996699 -262318199
811293034 -264299324
120273173 52410685
874944410 -52048424
445049930 -803690605
-138111276 -104634331
720288580 126597671
471164416 -348777147
-356502322...

output:

Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
...

result:

wrong answer 1st words differ - expected: 'No', found: 'Yes'