#include <bits/stdc++.h>
using namespace std;
int main() {
pair<int,int> domek[2]={{1,2},{3,4}};
int n=2;
sort(domek, domek+n);
int odleglosc=domek[0].first;
int wynik=10000;
for(int i=1;i<n;i++){
odleglosc+=(domek[i].second-domek[i-1].second);
wynik=min(wynik, odleglosc+domek[i].first);
odleglosc=min(odleglosc,domek[i].first);}
cout<<wynik;
return 0;
}
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