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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#697554#8333. GiftKOH-#WA 1ms5748kbC++142.0kb2024-11-01 14:47:092024-11-01 14:47:10

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你现在查看的是最新测评结果

  • [2024-11-01 14:47:10]
  • 评测
  • 测评结果:WA
  • 用时:1ms
  • 内存:5748kb
  • [2024-11-01 14:47:09]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
template <typename T>
inline void read(T &x){
	x=0;char ch=getchar();bool f=false;
	while(!isdigit(ch))	f|=ch=='-',ch=getchar();
	while(isdigit(ch))	x=(x<<1)+(x<<3)+(ch^48),ch=getchar();
	x=f?-x:x;return;
} 
template <typename T>
inline void print(T x){
	if(x<0)	putchar('-'),x=-x;
	if(x>9)	print(x/10);
	putchar(x%10^48);return; 
}

#define ll long long 
const int N=1e5+3;
int head[N],to[N<<1],Next[N<<1],tot=1;
void Addedge(int u,int v){
	to[++tot]=v,Next[tot]=head[u],head[u]=tot;
	return;
} 
int in[N],id[N],n;
bool Cmp(int x,int y){
	return in[x]>in[y];
}
int lst[N],dfn[N],dnt;
bool ring[N];
void Dfs(int u){
	dfn[u]=++dnt;
//	cout<<u<<"???\n";
	for(int i=head[u];i;i=Next[i]){
	
		int v=to[i];
		if(!dfn[v]){
			lst[v]=i;
			Dfs(v);
		}
		else if((i^1)!=lst[u]&&dfn[v]<dfn[u]){
//			cout<<u<<" "<<v<<"???\n";
			int now=u;ring[u]=true;
			while(now!=v){
				ring[now]=true;
				now=to[lst[now]^1];
//				cout<<now<<"???\n";
			}
//			cnt=dep[v]-dep[u]+1;
		}
	
	}
}
int t[N];
pair<int,int> e[N];
int main(){
//	int T;read(T);
//	while(T--){
		read(n);
		for(int i=1;i<=n;++i){
			id[i]=i;int u,v;read(u),read(v);
			Addedge(u,v),Addedge(v,u);
			in[u]++,in[v]++;
			e[i].first=u,e[i].second=v;
		}
		id[n]=n;
		sort(id+1,id+n+1,Cmp);
		Dfs(1);
		bool fl=false;
		ll ans=0;
//		for(int i=1;i<=n;++i){
//			if(ring[i])	cout<<i<<" ";
//		}
		for(int i=1;i<=n;++i) t[in[i]]++;
		if(t[5]>=3) puts("0");
		else{
			for(int i=1;i<=n;++i){
				int u=e[i].first,v=e[i].second;
				if(ring[u]&&ring[v]){
					t[in[u]]--,t[in[v]]--;
					t[in[u]-1]++,t[in[v]-1]++;
					if(!t[5]){
						int res=t[1]+t[2]+t[3];
						ans+=res;
					}
					t[in[u]]++,t[in[v]]++;
					t[in[u]-1]--,t[in[v]-1]--;
				}
			}
			print(ans);
		}
//		for(int i=1;i<=n;++i)	id[i]=head[i]=fa[i]=dep[i]=in[i]=0,ring[i]=false;
//		for(int i=1;i<=tot;++i)	to[i]=Next[i]=0;
//		tot=0;
//	}
	
	return 0;
}
/*
5
1 2
2 4
4 3
1 3
1 4

 6
 1 2
 1 3
 1 5
 1 6
 2 4
 3 4
*/
	

Details

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Test #1:

score: 0
Wrong Answer
time: 1ms
memory: 5748kb

input:

6
1 2
1 3
1 4
1 5
1 6
2 3

output:

0

result:

wrong answer 1st numbers differ - expected: '10', found: '0'