Submission #1587928


Source Code Expand

#include<cstdio>
int N,M;
struct edge{int to;edge*next;}E[400010],*ne=E,*first[100010];
void link(int u,int v){*ne=(edge){v,first[u]};first[u]=ne++;}
bool vis[100010],col[100010];
int tot;
bool dfs(int i){
	vis[i]=1;++tot;
	bool r=1;
	for(edge*e=first[i];e;e=e->next){
		if(!vis[e->to])col[e->to]=!col[i],r|=dfs(e->to);
		else if(col[e->to]==col[i])r=0;
	}
	return r;
}
int main(){
	scanf("%d%d",&N,&M);
	for(int i=0,u,v;i<M;i++)scanf("%d%d",&u,&v),link(u,v),link(v,u);
	int a=0,b=0,s=0;
	for(int i=1;i<=N;i++)if(!vis[i]){
		int o=tot;
		if(dfs(i))(o=tot-o)>1?++a:++s;
		else++b;
	}
	long long ans=(2ll*N-s)*s+(a+b)*1ll*(a+b)+1ll*a*a;
	printf("%lld\n",ans);
}

Submission Info

Submission Time
Task C - Squared Graph
User vjudge5
Language C++14 (GCC 5.4.1)
Score 0
Code Size 659 Byte
Status WA
Exec Time 47 ms
Memory 10112 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:17:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&N,&M);
                     ^
./Main.cpp:18:65: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  for(int i=0,u,v;i<M;i++)scanf("%d%d",&u,&v),link(u,v),link(v,u);
                                                                 ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 0 / 800
Status
AC × 2
AC × 23
WA × 9
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 128 KB
in10.txt AC 1 ms 256 KB
in11.txt AC 1 ms 128 KB
in12.txt AC 11 ms 4224 KB
in13.txt AC 11 ms 4224 KB
in14.txt AC 22 ms 6272 KB
in15.txt WA 3 ms 1408 KB
in16.txt WA 17 ms 4224 KB
in17.txt WA 13 ms 4608 KB
in18.txt WA 31 ms 7296 KB
in19.txt AC 24 ms 7552 KB
in2.txt WA 1 ms 128 KB
in20.txt WA 25 ms 7552 KB
in21.txt AC 47 ms 10112 KB
in22.txt AC 39 ms 6912 KB
in23.txt AC 36 ms 6528 KB
in24.txt AC 2 ms 1152 KB
in25.txt AC 46 ms 10112 KB
in26.txt WA 1 ms 128 KB
in27.txt WA 1 ms 256 KB
in28.txt AC 47 ms 10112 KB
in3.txt AC 1 ms 128 KB
in4.txt AC 1 ms 128 KB
in5.txt AC 35 ms 6400 KB
in6.txt AC 3 ms 1280 KB
in7.txt AC 3 ms 1408 KB
in8.txt WA 5 ms 1664 KB
in9.txt AC 15 ms 4864 KB
sample1.txt AC 1 ms 128 KB
sample2.txt AC 1 ms 128 KB