Submission #1574841


Source Code Expand

#include<cstdio>
#include<iostream>
using namespace std;
const int N=100010;
struct tyc{
	int to,next;
}e[4*N];
int head[N],n,m,size;
int x,y;
int oh,si,oth;
long long ans;
bool p=0;
bool vis[N],color[N];
void add(int x,int y)
{
	size++;
	e[size].to=y;
	e[size].next=head[x];
	head[x]=size;
}
int dfs(int x,int fa,int s)
{
	//cout<<x<<endl;
	vis[x]=1;
	color[x]=color[fa]^1;
	for (int i=head[x];i;i=e[i].next)
	{
		int y=e[i].to;
		if (y!=fa)
			if (vis[y])
			{
				if (color[x]==color[y]) p=1;
				return s;
			}
			else return dfs(y,x,s+1);
	}
	return s;
}
int main()
{
	scanf("%d%d",&n,&m);
	for (int i=1;i<=m;i++)
		scanf("%d%d",&x,&y),add(x,y),add(y,x);
	for (int i=1;i<=n;i++)
	{

		if (!vis[i])
		{
			if (head[i]==0) {si++,vis[i]=1;continue;}
			p=0;
			int siz=dfs(i,0,1);
			if (p) oh+=1;
			else oth+=1;
		}
	}
	//cout<<si<<" "<<oh<<" "<<oth<<endl;
//	cout<<2ll*si*n-1ll*si*si+((oth==1)?2:2ll*oth*(oth-1))+((oh==1)?1:1ll*oh*(oh-1))+2ll*oh*oth<<endl;
	ans=2ll*si*n-1ll*si*si+2ll*oth*oth+1ll*oh*oh+2ll*oh*oth;
	printf("%lld",ans);
}

Submission Info

Submission Time
Task C - Squared Graph
User vjudge5
Language C++14 (GCC 5.4.1)
Score 0
Code Size 1042 Byte
Status WA
Exec Time 39 ms
Memory 3968 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:41:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
                     ^
./Main.cpp:43:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&x,&y),add(x,y),add(y,x);
                                        ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 0 / 800
Status
AC × 2
AC × 10
WA × 22
Set Name Test Cases
Sample sample1.txt, sample2.txt
All sample1.txt, sample2.txt, in1.txt, in10.txt, in11.txt, in12.txt, in13.txt, in14.txt, in15.txt, in16.txt, in17.txt, in18.txt, in19.txt, in2.txt, in20.txt, in21.txt, in22.txt, in23.txt, in24.txt, in25.txt, in26.txt, in27.txt, in28.txt, in3.txt, in4.txt, in5.txt, in6.txt, in7.txt, in8.txt, in9.txt, sample1.txt, sample2.txt
Case Name Status Exec Time Memory
in1.txt WA 1 ms 256 KB
in10.txt AC 1 ms 384 KB
in11.txt AC 1 ms 256 KB
in12.txt AC 10 ms 1664 KB
in13.txt AC 11 ms 1664 KB
in14.txt AC 20 ms 2432 KB
in15.txt WA 3 ms 896 KB
in16.txt WA 15 ms 2048 KB
in17.txt WA 12 ms 1664 KB
in18.txt WA 28 ms 2944 KB
in19.txt WA 21 ms 2432 KB
in2.txt WA 1 ms 256 KB
in20.txt WA 22 ms 2432 KB
in21.txt WA 39 ms 3968 KB
in22.txt WA 32 ms 3456 KB
in23.txt WA 30 ms 3328 KB
in24.txt AC 2 ms 896 KB
in25.txt WA 39 ms 3968 KB
in26.txt WA 1 ms 256 KB
in27.txt WA 1 ms 256 KB
in28.txt WA 39 ms 3968 KB
in3.txt WA 1 ms 256 KB
in4.txt WA 1 ms 256 KB
in5.txt WA 31 ms 3456 KB
in6.txt WA 3 ms 896 KB
in7.txt WA 3 ms 896 KB
in8.txt WA 5 ms 1024 KB
in9.txt WA 13 ms 1792 KB
sample1.txt AC 1 ms 256 KB
sample2.txt AC 1 ms 256 KB