Submission #1590333

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Source Code Expand

#include <bits/stdc++.h>

using namespace std;

inline int read()
{
	int x=0,f=1; char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')f=-1; ch=getchar();}
	while(ch>='0'&&ch<='9'){x=x*10+ch-'0'; ch=getchar();}
	return x*f;
}
int n,m,si[200010],fs;
inline void deal(int x)
{
	si[x]^=1; if(si[x]) fs=0;
	else fs=1;
}
int main()
{
	n=read(); m=read(); fs=1;
	for(int i=1;i<=m;i++)
	{
		int k=read(); deal(k);
		k=read(); deal(k);
	}
	if(fs) assert(0);
	if(fs) cout << "YES" << endl;
	else cout << "NO" << endl;
	return 0 ;
}

Submission Info

Judge Result