#include <bits/stdc++.h>

using namespace std;

ifstream fin  ("wanted.in");
ofstream fout ("wanted.out");

const int MAX_N = 200;
int n;
struct oras{
    int x, y;
    inline bool operator < (const oras &rhs) const{
        return x < rhs.x;
    }
} o[MAX_N + 5];

multimap <pair<int, pair<int, int>>, long long> mem;

long long best;
static inline long long solve(int st, int dr, int index){

    if(st > dr)
        return 0;

    if(st == dr)
        return abs(o[index].x - o[st].x) + o[st].y;

    pair<int, pair<int, int>> crt = {st, {dr, index}};
    if(mem.find(crt) == mem.end()){
        long long best;
        for(int md=st; md<=dr; md++){
            ///merg de la o[index] la o[md]
            long long answer = abs(o[index].x - o[md].x);

            ///vizitez oras-ul o[md]
            answer += 2 * o[md].y;

            ///in functie de raspuns ma duc in stanga respectiv dreapta
            answer += max(solve(st, md-1, md), solve(md+1, dr, md));

            ///cel mai bun traseu
            if(md == st)
                best = answer;
            else
                best = min(best, answer);
        }
        mem.insert(make_pair(crt, best));
    }
    return (*mem.find(crt)).second;
}

int main (){
    ios_base::sync_with_stdio(false);
    fin.tie(nullptr), fout.tie(nullptr);

    fin>>n;
    o[0] = {0, 0};
    for(int i=1; i<=n; i++)
        fin>>o[i].x>>o[i].y;
    sort(o+1, o+n+1);

    fout<<solve(1, n, 0);
    return 0;
}