33 lines
595 B
C++
33 lines
595 B
C++
#include<iostream>
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const int MAX=200001;
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int s[MAX];
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using namespace std;
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int main()
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{
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int n,m,i,j,sum;
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while(cin>>n,n!=0)
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{
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sum=0;
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cin>>s[0];
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sum=s[0];
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for(i=1;i<n;i++)
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{
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cin>>s[i];
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sum^=s[i];
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}
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if(!sum)
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cout<<"No"<<endl;
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else
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{
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cout<<"Yes"<<endl;
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for(i=0;i<n;i++)
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{
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j=sum^s[i];
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if(j<s[i])
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cout<<s[i]<<" "<<j<<endl;
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}
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}
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}
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return 0;
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}
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