#include<bits/stdc++.h>
#define int long long
#define INF 1000000000000000000
using namespace std;
ifstream f("stalpi.in");
ofstream g("stalpi.out");

struct elem
{
    int x,c,s,d;
}v[100005];

int cmp(elem aa, elem bb)
{
    return aa.d<bb.d;
}

int n,k,pozx[100005],aint[4*100005],dp[100005],a[100005],lef[100005],righ[100005];

void update(int nod, int st, int dr, int poz, int val)
{
    if(st==dr)
        aint[nod]=val;
    else
    {
        int mij=(st+dr)/2;
        if(poz<=mij)
            update(2*nod,st,mij,poz,val);
        else
            update(2*nod+1,mij+1,dr,poz,val);
        aint[nod]=min(aint[2*nod],aint[2*nod+1]);
    }
}

int query(int nod, int st, int dr, int l, int r)
{
    if(st==l && dr==r)
        return aint[nod];
    else
    {
        int mij=(st+dr)/2;
        if(r<=mij)
            return query(2*nod,st,mij,l,r);
        else
        if(l>=mij+1)
            return query(2*nod+1,mij+1,dr,l,r);
        else
            return min(query(2*nod,st,mij,l,mij),query(2*nod+1,mij+1,dr,mij+1,r));
    }
}

signed main()
{
    int i,j;
    f>>n;
    for(i=1;i<=n;i++)
    {
        f>>v[i].x>>v[i].c>>v[i].s>>v[i].d;
        v[i].s=v[i].x-v[i].s;
        v[i].d=v[i].x+v[i].d;
        a[++k]=v[i].x;
    }
    sort(v+1,v+n+1,cmp);
    sort(a+1,a+k+1);
    i=1;
    j=1;
    while(i<=n && j<=k)
    {
        if(v[i].s>=a[j])
            lef[i]=j,j++;
        else
            i++;
    }
    while(i<=n)
        lef[i]=k;
    i=1;
    j=1;
    while(i<=n && j<=k)
    {
        if(v[i].d>=a[j])
            righ[i]=j,j++;
        else
            i++;
    }
    while(i<=n)
        righ[i]=k,i++;
    for(i=1;i<=n;i++)
    {
        if(lef[i]==0)
            lef[i]=1;
        if(righ[i]==0)
            righ[i]=1;
    }
    for(i=1;i<=n;i++)
        dp[i]=INF;
    for(i=1;i<=4*n;i++)
        aint[i]=INF;
    for(i=1;i<=n;i++)
    {
        int ss=lef[i];
        int dd=righ[i];
        int nr=query(1,1,n,ss,dd);
        if(nr==INF)
            nr=0;
        dp[dd]=min(dp[dd],v[i].c+nr);
        update(1,1,n,i,dp[dd]);
    }
    g<<dp[n];
    return 0;
}