This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
int re=0;
vector<char>v;
int main()
{ios_base::sync_with_stdio(false);
cin.tie(NULL);
string s;cin>>s;
int n=s.size();
int r=-1;
for(int i=0;i<n;i++)
{
	if(r<0||i==0||s[i]!=v[r])
	{
		v.push_back(s[i]);
		r++;
		
	}
	else {
		v.pop_back();
		re=1-re;
		r--;
	}
}
if (re==0)
{
	cout<<"No";return 0;
}
cout<<"Yes";
}
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