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A.cpp
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A.cpp
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#include<bits/stdc++.h>
using namespace std;
#define fastio ios_base::sync_with_stdio(false);cin.tie(NULL)
int main()
{
fastio;
int i,j,k,ara[12],sm=0,p=0;
for(i=0;i<6;i++)
{
cin>>ara[i];
sm+=ara[i];
}
if(sm%2==1)
{
cout<<"NO\n";
return 0;
}
for(i=0;i<6;i++)
{
for(j=i+1;j<6;j++)
{
for(k=j+1;k<6;k++)
{
if(ara[i]+ara[j]+ara[k]==sm/2)
{
p=1;
break;
}
}
if(p==1)
break;
}
if(p==1)
break;
}
if(p==1)
cout<<"YES\n";
else
cout<<"NO\n";
return 0;
}