Submission #1574283


Source Code Expand

#include<iostream>
#include<cstring>
#include<cstdio>
#include<cmath>
#include<cstdlib>
#include<algorithm>
#include<queue>
using namespace std;

const int N=1000005;
const int M=N<<1;

struct E{
	int to,next;
}mem[M];
int n,m,x,y,k,u,num,I,P,Q,sz;
bool tag;
int head[N],dis[N];
bool vis[N];
queue<int> q;

void add(int x,int y){
	num++;
	mem[num].to=y; mem[num].next=head[x];
	head[x]=num;
}

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]) continue;
		while (!q.empty()) q.pop();
		sz=1; tag=1;
		q.push(i); vis[i]=1; dis[i]=0;
		while (!q.empty()){
			k=q.front(); q.pop();
			for (int j=head[k];j;j=mem[j].next){
				u=mem[j].to;
				if (!vis[u]){
					vis[u]=1;
					sz++;
					q.push(u);
					dis[u]=dis[k]+1;
				}
				else{
					if ((dis[k]-dis[u])%2==0) tag=0;
				}
			}
		}
		if (sz==1) I++;
		else{
			if (tag) Q++;
			else P++;
		}
	}
	printf("%lld\n",2ll*I*n-1ll*I*I+1ll*P*P+2ll*P*Q+2ll*Q*Q);
	return 0;
}

Submission Info

Submission Time
Task C - Squared Graph
User vjudge5
Language C++14 (GCC 5.4.1)
Score 800
Code Size 1017 Byte
Status AC
Exec Time 45 ms
Memory 7040 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:29:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
                     ^
./Main.cpp:31:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&x,&y);
                      ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 800 / 800
Status
AC × 2
AC × 32
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 4352 KB
in10.txt AC 2 ms 2816 KB
in11.txt AC 2 ms 4352 KB
in12.txt AC 12 ms 4864 KB
in13.txt AC 12 ms 4864 KB
in14.txt AC 22 ms 6912 KB
in15.txt AC 4 ms 4864 KB
in16.txt AC 17 ms 4864 KB
in17.txt AC 14 ms 4864 KB
in18.txt AC 32 ms 6912 KB
in19.txt AC 23 ms 6912 KB
in2.txt AC 2 ms 4352 KB
in20.txt AC 23 ms 6912 KB
in21.txt AC 43 ms 7040 KB
in22.txt AC 38 ms 6528 KB
in23.txt AC 37 ms 6400 KB
in24.txt AC 3 ms 4864 KB
in25.txt AC 44 ms 7040 KB
in26.txt AC 2 ms 4352 KB
in27.txt AC 2 ms 4352 KB
in28.txt AC 45 ms 7040 KB
in3.txt AC 2 ms 4352 KB
in4.txt AC 2 ms 4352 KB
in5.txt AC 36 ms 6912 KB
in6.txt AC 4 ms 4864 KB
in7.txt AC 4 ms 4864 KB
in8.txt AC 6 ms 4864 KB
in9.txt AC 15 ms 4864 KB
sample1.txt AC 2 ms 4352 KB
sample2.txt AC 2 ms 4352 KB