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>
#define all(s) s.begin(),s.end()
using namespace std;
typedef long long ll;
ll n,a[100009],b[100009],sum=1e18;
map<pair<ll,ll>,bool>mp;
ll best(ll x,ll y,ll xx,ll yy)
{
ll ans=0,o;
for(ll i=(1<<30); i; i>>=1)
{
if((i&x)==(i&xx)&&(i&y)==(i&yy))
continue;
if((i&x)&&(i&xx)==0)
{
o=0;
for(ll j=i; j; j>>=1)
{
o|=(j&x);
if((j&y))
{
ans+=j;
y^=j;
}
}
ans+=o-i+1;
x^=i,x|=(i-1);
}
if((i&x)==0&&(i&xx))
{
o=0;
for(ll j=i; j; j>>=1)
{
o|=(j&xx);
if((j&yy))
{
ans+=j;
yy^=j;
}
}
ans+=o-i+1;
xx^=i,xx|=(i-1);
}
if((i&y)&&(i&yy)==0)
{
o=0;
for(ll j=i; j; j>>=1)
{
o|=(j&y);
if((j&x))
{
ans+=j;
x^=j;
}
}
ans+=o-i+1;
y^=i,y|=(i-1);
}
if((i&y)==0&&(i&yy))
{
o=0;
for(ll j=i; j; j>>=1)
{
o|=(j&yy);
if((j&xx))
{
ans+=j;
xx^=j;
}
}
ans+=o-i+1;
yy^=i,yy|=(i-1);
}
}
return ans;
}
int main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
cin>>n;
mp[{0,0}]=1;
for(ll i=0; i<n; i++)
{
cin>>a[i]>>b[i];
ll x=0,y=0;
for(ll j=(1<<30);j;j>>=1)
{
if(a[i]&j)
x+=j;
else if(b[i]&j)
y+=j;
mp[{x,y}]=1;
}
}
for(auto z:mp)
{
if(z.second==0)
continue;
ll xo=z.first.first;
ll yo=z.first.second;
ll op=0;
for(ll i=0;i<n;i++)
op+=best(xo,yo,a[i],b[i]);
sum=min(sum,op);
}
cout<<sum;
return 0;
}
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