Submission #1535010
Source Code Expand
//by yjz
#include<bits/stdc++.h>
using namespace std;
#define FF first
#define SS second
#define PB push_back
#define MP make_pair
#define bged(v) (v).begin(),(v).end()
#define foreach(it,s) for(__typeof((s).begin()) it=(s).begin();it!=(s).end();it++)
typedef long long ll;
const int Imx=2147483647;
const ll Lbig=2e18;
const int mod=1e9+7;
//My i/o stream
struct fastio
{
char s[100000];
int it,len;
fastio(){it=len=0;}
inline char get()
{
if(it<len)return s[it++];it=0;
len=fread(s,1,100000,stdin);
if(len==0)return EOF;else return s[it++];
}
bool notend()
{
char c=get();
while(c==' '||c=='\n')c=get();
if(it>0)it--;
return c!=EOF;
}
}_buff;
#define geti(x) x=getnum()
#define getii(x,y) geti(x),geti(y)
#define getiii(x,y,z) getii(x,y),geti(z)
#define puti(x) putnum(x),putchar(' ')
#define putii(x,y) puti(x),puti(y)
#define putiii(x,y,z) putii(x,y),puti(z)
#define putsi(x) putnum(x),putchar('\n')
#define putsii(x,y) puti(x),putsi(y)
#define putsiii(x,y,z) putii(x,y),putsi(z)
inline ll getnum()
{
ll r=0;bool ng=0;char c;c=_buff.get();
while(c!='-'&&(c<'0'||c>'9'))c=_buff.get();
if(c=='-')ng=1,c=_buff.get();
while(c>='0'&&c<='9')r=r*10+c-'0',c=_buff.get();
return ng?-r:r;
}
template<class T> inline void putnum(T x)
{
if(x<0)putchar('-'),x=-x;
register short a[20]={},sz=0;
while(x)a[sz++]=x%10,x/=10;
if(sz==0)putchar('0');
for(int i=sz-1;i>=0;i--)putchar('0'+a[i]);
}
inline char getreal(){char c=_buff.get();while(c==' '||c=='\n')c=_buff.get();return c;}
int n,m;
vector<int>con[100111];
bool f[100111];
int col[100111];
bool dfs(int x,int c=2)
{
bool ret=1;
col[x]=c;
for(int i=0;i<con[x].size();i++)
{
if(col[con[x][i]]!=0)
{
if(col[con[x][i]]!=(c^1))ret=0;
continue;
}
if(!dfs(con[x][i],c^1))ret=0;
}
return ret;
}
int main()
{
getii(n,m);
for(int i=1;i<=m;i++)
{
int x,y;
getii(x,y);
con[x].PB(y);
con[y].PB(x);
f[x]=f[y]=1;
}
ll ans=0;
int useless=0;
for(int i=1;i<=n;i++)useless+=!f[i];
int bi=0,nbi=0;
for(int i=1;i<=n;i++)
{
if(f[i]&&!col[i])
{
int type=dfs(i);
if(type==1)bi++;else nbi++;
}
}
// cout<<useless<<" "<<bi<<" "<<nbi<<endl;
ans+=1ll*n*useless*2-1ll*useless*useless;
n-=useless;
ans+=1ll*bi*bi*2+2ll*nbi*bi+1ll*nbi*nbi;
cout<<ans<<endl;
return 0;
}
Submission Info
Submission Time |
|
Task |
C - Squared Graph |
User |
fizzydavid |
Language |
C++14 (GCC 5.4.1) |
Score |
800 |
Code Size |
2380 Byte |
Status |
AC |
Exec Time |
57 ms |
Memory |
10112 KB |
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 |
2 ms |
2560 KB |
in10.txt |
AC |
2 ms |
2560 KB |
in11.txt |
AC |
2 ms |
2560 KB |
in12.txt |
AC |
18 ms |
6272 KB |
in13.txt |
AC |
13 ms |
6272 KB |
in14.txt |
AC |
23 ms |
6272 KB |
in15.txt |
AC |
5 ms |
3456 KB |
in16.txt |
AC |
18 ms |
4736 KB |
in17.txt |
AC |
14 ms |
5888 KB |
in18.txt |
AC |
32 ms |
7296 KB |
in19.txt |
AC |
26 ms |
7168 KB |
in2.txt |
AC |
2 ms |
2560 KB |
in20.txt |
AC |
26 ms |
7168 KB |
in21.txt |
AC |
57 ms |
10112 KB |
in22.txt |
AC |
20 ms |
6016 KB |
in23.txt |
AC |
11 ms |
4992 KB |
in24.txt |
AC |
3 ms |
3072 KB |
in25.txt |
AC |
48 ms |
10112 KB |
in26.txt |
AC |
2 ms |
2560 KB |
in27.txt |
AC |
3 ms |
2688 KB |
in28.txt |
AC |
47 ms |
10112 KB |
in3.txt |
AC |
2 ms |
2560 KB |
in4.txt |
AC |
2 ms |
2560 KB |
in5.txt |
AC |
25 ms |
5888 KB |
in6.txt |
AC |
4 ms |
3456 KB |
in7.txt |
AC |
4 ms |
3328 KB |
in8.txt |
AC |
6 ms |
4096 KB |
in9.txt |
AC |
14 ms |
5120 KB |
sample1.txt |
AC |
2 ms |
2560 KB |
sample2.txt |
AC |
2 ms |
2560 KB |