Submission #1574925
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=0;
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;
}
void dfs(int x,int fa)
{
//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;
continue;
}
else dfs(y,x);
}
}
return;
}
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;
dfs(i,0);
if (p) oh++;
else oth++;
}
}
//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
2017-09-08 22:20:52+0900
Task
C - Squared Graph
User
vjudge4
Language
C++14 (GCC 5.4.1)
Score
800
Code Size
1022 Byte
Status
AC
Exec Time
48 ms
Memory
6784 KB
Compile Error
./Main.cpp: In function ‘int main()’:
./Main.cpp:43:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&n,&m);
^
./Main.cpp:45:40: 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
800 / 800
Status
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
AC
1 ms
256 KB
in10.txt
AC
1 ms
384 KB
in11.txt
AC
1 ms
256 KB
in12.txt
AC
11 ms
1664 KB
in13.txt
AC
11 ms
1664 KB
in14.txt
AC
21 ms
2432 KB
in15.txt
AC
3 ms
1024 KB
in16.txt
AC
17 ms
2048 KB
in17.txt
AC
13 ms
2048 KB
in18.txt
AC
32 ms
3968 KB
in19.txt
AC
24 ms
3584 KB
in2.txt
AC
1 ms
256 KB
in20.txt
AC
24 ms
3712 KB
in21.txt
AC
48 ms
6784 KB
in22.txt
AC
41 ms
3840 KB
in23.txt
AC
38 ms
3456 KB
in24.txt
AC
2 ms
896 KB
in25.txt
AC
48 ms
6784 KB
in26.txt
AC
1 ms
256 KB
in27.txt
AC
1 ms
256 KB
in28.txt
AC
48 ms
6784 KB
in3.txt
AC
1 ms
256 KB
in4.txt
AC
1 ms
256 KB
in5.txt
AC
36 ms
3456 KB
in6.txt
AC
3 ms
896 KB
in7.txt
AC
3 ms
1024 KB
in8.txt
AC
5 ms
1024 KB
in9.txt
AC
14 ms
2432 KB
sample1.txt
AC
1 ms
256 KB
sample2.txt
AC
1 ms
256 KB