using System; using System.Collections.Generic; using System.Collections; using System.Collections.Specialized; using System.Linq; using System.Text; using System.Text.RegularExpressions; using System.IO; using System.Reflection; using static System.Math; using System.Numerics; using System.Threading; using System.Runtime.CompilerServices; using System.Diagnostics; using nint=System.Int64; static class Program{ const long inf=long.MaxValue>>1; const int mod=(int)1e9+7;//998244353; static Sc sc=new Sc(); static Pt pt=new Pt(); static void Main(){ Solve(); pt.Sm(); } static void Solve() { var n=sc.I; var h=new int[n+1][]; var avl=new Avl(false,false); var li=new List(); long ans=0,z=0; for(int i = 1;i<=n;i++) { h[i]=sc.Ia; int m=h[i][0]; avl.Ud(m,Min(m+z-h[i][1],avl.Hs(m).d)); ans+=h[i][1]+m; long d=inf; while(li.Count>0&&li[li.Count-1]>=m){ d=Min(d,avl.Hs(li[li.Count-1]).d-li[li.Count-1]); li.RemoveAt(li.Count-1); } avl.Ud(m,Min(d+m,avl.Hs(m).d)); li.Add(h[i][0]); z=avl.Rd(0,mod).d; } pt.Wl(ans+z); } } public class Avl{ public class Nd{ public int h=1,c=1; public readonly nint n; public long d; public Nd l,r,nx; public Nd(nint n,long d,Nd du){this.n=n;this.d=d;nx=this;l=du;r=du;} public override string ToString()=>"n:"+n.ToString()+" d:"+d.ToString(); } private Func compare; private Action compare2; public Nd root,du; public int cnt=0; public bool bb; public Avl(bool bo,bool bb){ if(bo){ du=new Nd(nint.MinValue,long.MinValue,du); compare=CoMax; compare2=CoMax; } else{ du=new Nd(nint.MinValue,long.MaxValue,du); compare=CoMin; compare2=CoMin; } this.bb=bb; du.h=0;du.c=0; root=du; } public Avl(Avl z){ if(z.du.d==long.MinValue){ du=new Nd(nint.MinValue,long.MinValue,du); compare=CoMax; compare2=CoMax; } else{ du=new Nd(nint.MinValue,long.MaxValue,du); compare=CoMin; compare2=CoMin; } bb=z.bb; du.h=0;du.c=0; root=Fu(z.root); cnt=z.cnt; Nd Fu(Nd nd){ if(nd.h==0){return du;} Nd mn=new Nd(nd.n,nd.d,du); mn.h=nd.h; mn.c=nd.c; mn.l=Fu(nd.l); mn.r=Fu(nd.r); compare2(mn); return mn; } } private bool CoMax(long a,long b){return a>=b;} private bool CoMin(long a,long b){return a<=b;} private void CoMax(Nd t){ t.nx=t; if(t.nx.dt.l.nx.d){t.nx=t.l.nx;} if(t.nx.d>t.r.nx.d){t.nx=t.r.nx;} } public void Ud(nint n,long d){ if(root==du){root=new Nd(n,d,du);cnt++;} else if(root.n==n){ if(bb){root.d+=d;} else{root.d=d;} compare2(root); } else if(Fu(root,n,d)){ if(Abs(root.l.h-root.r.h)>1){root=Rotate(root);} cnt++; } } private bool Fu(Nd t,nint n,long d){ bool bo=false; if(t.n>n){ if(t.l!=du){ if(t.l.n==n){ if(bb){t.l.d+=d;} else{t.l.d=d;} compare2(t.l); } else if(bo=Fu(t.l,n,d)){ t.c++; if(Abs(t.l.l.h-t.l.r.h)>1){t.l=Rotate(t.l);} t.h=Max(t.l.h,t.r.h)+1; } compare2(t); } else{ t.l=new Nd(n,d,du); bo=true; t.c++; t.h=Max(t.l.h,t.r.h)+1; t.nx=compare(t.nx.d,t.l.d)?t.nx:t.l; } } else{ if(t.r!=du){ if(t.r.n==n){ if(bb){t.r.d+=d;} else{t.r.d=d;} compare2(t.r); } else if(bo=Fu(t.r,n,d)){ t.c++; if(Abs(t.r.l.h-t.r.r.h)>1){t.r=Rotate(t.r);} t.h=Max(t.l.h,t.r.h)+1; } compare2(t); } else{ t.r=new Nd(n,d,du); bo=true; t.c++; t.h=Max(t.l.h,t.r.h)+1; t.nx=compare(t.nx.d,t.r.d)?t.nx:t.r; } } return bo; } private Nd Rotate(Nd t){ Nd nd=du; if(t.l.h>t.r.h){ if(t.l.l.h>t.l.r.h){ nd=t.l;t.l=t.l.r;nd.r=t; Ft(t); } else{ nd=t.l.r; t.l.r=nd.l;nd.l=t.l; Ft(t.l); t.l=nd.r;nd.r=t; Ft(t); } } else{ if(t.r.l.h>t.r.r.h){ nd=t.r.l; t.r.l=nd.r;nd.r=t.r; Ft(t.r); t.r=nd.l;nd.l=t; Ft(t); } else{ nd=t.r;t.r=t.r.l;nd.l=t; Ft(t); } } Ft(nd); return nd; } private void Ft(Nd t){ t.h=Max(t.l.h,t.r.h)+1; t.c=t.l.c+t.r.c+1; compare2(t); } public bool Dl(nint n){ if(cnt==0){return false;} Nd t=root; if(t.n==n){ root=Fd2(root); if(cnt==0){return true;} else if(Abs(root.l.h-root.r.h)>1){root=Rotate(root);} else{Ft(root);} return true; } bool bo=Fd1(root,n); if(Abs(root.l.h-root.r.h)>1){root=Rotate(root);} else{Ft(root);} return bo; } private bool Fd1(Nd t,nint n){ if(t.n>n){ if(t.l==du){return false;} else if(t.l.n!=n){ bool bo=Fd1(t.l,n); if(Abs(t.l.l.h-t.l.r.h)>1){t.l=Rotate(t.l);} else{Ft(t.l);} return bo; } else{ t.l=Fd2(t.l); Ft(t); return true; } } else{ if(t.r==du){return false;} else if(t.r.n!=n){ bool bo=Fd1(t.r,n); if(Abs(t.r.l.h-t.r.r.h)>1){t.r=Rotate(t.r);} else{Ft(t.r);} return bo; } else{ t.r=Fd2(t.r); Ft(t); return true; } } } private Nd Fd2(Nd dn){ cnt--; if(dn.l==du){return dn.r;} if(dn.r==du){return dn.l;} Nd u=dn.l; if(u.r==du){ u.r=dn.r; Ft(u); return u; } u=Fd3(u,dn); if(Abs(dn.l.l.h-dn.l.r.h)>1){u.l=Rotate(dn.l);} else{Ft(dn.l);} Ft(u); return u; } private Nd Fd3(Nd u,Nd dn){ if(u.r.r!=du){ Nd v=Fd3(u.r,dn); if(Abs(u.r.l.h-u.r.r.h)>1){u.r=Rotate(u.r);} else{Ft(u.r);} return v; } else{ Nd v=u.r;u.r=u.r.l;v.l=dn.l;v.r=dn.r; return v; } } public Nd Hs(nint n){ Nd t=root; if(cnt==0){return du;} if(t.n==n){return t;} Nd a=du; while(true){ if(t.n>n){ if(t.l==du){break;} else if(t.l.n!=n){t=t.l;} else{a=t.l;break;} } else{ if(t.r==du){break;} else if(t.r.n!=n){t=t.r;} else{a=t.r;break;} } } return a; } public Nd Ra(int n){return cnt>=n&&cnt!=0?Fr(root,n):du;} private Nd Fr(Nd t,int n){ if(t.l.c>n-1){return Fr(t.l,n);} if(t.l.cn){ if(t.l==du){return t;} Nd u=Flb(t.l,n); return u==du?t:u; } return t; } public Nd Ub(nint n){return cnt!=0?Fub(root,n):du;} private Nd Fub(Nd t,nint n){ if(t.n>n){ if(t.l==du){return du;} return Fub(t.l,n); } if(t.n=a,r);} if(t.n>b){return Frg(t.l,a,b,l,t.n<=b);} return Frg(t.l,a,b,l,t.n<=b)+Frg(t.r,a,b,t.n>=a,r)+1; } public Nd Rd(nint a,nint b){return cnt!=0?Frd(root,a,b,false,false):du;} private Nd Frd(Nd t,nint a,nint b,bool l,bool r){ if(t.h==0){return du;} if(l&&r){return t.nx;} if(t.n=a,r);} if(t.n>b){return Frd(t.l,a,b,l,t.n<=b);} var e1=Frd(t.l,a,b,l,t.n<=b); var e2=Frd(t.r,a,b,t.n>=a,r); e1=compare(e1.d,e2.d)?e1:e2; return compare(t.d,e1.d)?t:e1; } public Nd Gl(nint a,nint b,long d){return cnt==0?du:Fgl(root,a,b,d);} private Nd Fgl(Nd t,nint a,nint b,long d){ Nd p=du; if(a<=t.n&&t.n<=b&&compare(t.d,d)){p=t;} if(a<=t.n&&compare(t.l.nx.d,d)){ var z=Fgl(t.l,a,b,d); if(z!=du){p=z;} } if(p==du&&t.n<=b&&compare(t.r.nx.d,d)){p=Fgl(t.r,a,b,d);} return p; } public Nd Gr(nint a,nint b,long d){return cnt==0?du:Fgr(root,a,b,d);} private Nd Fgr(Nd t,nint a,nint b,long d){ Nd p=du; if(a<=t.n&&t.n<=b&&compare(t.d,d)){p=t;} if(t.n<=b&&compare(t.r.nx.d,d)){ var z=Fgr(t.r,a,b,d); if(z!=du){p=z;} } if(p==du&&a<=t.n&&compare(t.l.nx.d,d)){p=Fgr(t.l,a,b,d);} return p; } public void En(Action f){if(cnt>0){Fen(root,f);}} private void Fen(Nd t,Action f){ f(t); if(t.l!=du){Fen(t.l,f);} if(t.r!=du){Fen(t.r,f);} } } public class Avls:Avl{ private readonly int m,f; private readonly (long n,long k,long d) dv=(-1,-1,-1); public Avls(bool bo,bool bb,int c):base(bo,bb){ m=(int)Ceiling(Log(c,2)); f=(1<>m,e.n&f,e.d):dv; } public new (long n,long k,long d) Hs(nint n){ var e=base.Lb(n<>m==n?(e.n>>m,e.n&f,e.d):dv; } public (long n,long k,long d) Hs(nint n,int k){ var e=base.Hs((n<>m,e.n&f,e.d):dv; } public new (long n,long k,long d) Lb(nint n){ var e=base.Lb(n<>m,e.n&f,e.d):dv; } public new (long n,long k,long d) Ub(nint n){ var e=base.Ub(((n+1)<>m,e.n&f,e.d):dv; } public new int Rg(nint a,nint b){return base.Rg(a<>m,e.n&f,e.d):dv; } public new (long n,long k,long d) Gr(nint a,nint b,long d){ var e=base.Gr(a<>m,e.n&f,e.d):dv; } public long Nn(nint n,int k){return (n<(string s){return (T)Convert.ChangeType(s,typeof(T));} public virtual int I{get{return int.Parse(Rl());}} public virtual long L{get{return long.Parse(Rl());}} public virtual double D{get{return double.Parse(Rl());}} public virtual string S{get{return Rl();}} public int[] Ia{get{return Array.ConvertAll(Sp(Rl()),int.Parse);}} public long[] La{get{return Array.ConvertAll(Sp(Rl()),long.Parse);}} public double[] Da{get{return Array.ConvertAll(Sp(Rl()),double.Parse);}} public string[] Sa{get{return Sp(Rl());}} public object[] Oa{get{return Sp(Rl());}} public int[] Ia2{get{return Array.ConvertAll(Sp("0 "+Rl()+" 0"),int.Parse);}} public int[] Ia3(string a,string b){return Array.ConvertAll(Sp(a+Rl()+b),int.Parse);} public int[] Ia3(int a){return Array.ConvertAll(Sp(Rl()+" "+a.ToString()),int.Parse);} public long[] La2{get{return Array.ConvertAll(Sp("0 "+Rl()+" 0"),long.Parse);}} public long[] La3(string a,string b){return Array.ConvertAll(Sp(a+Rl()+b),long.Parse);} public long[] La3(int a){return Array.ConvertAll(Sp(Rl()+" "+a.ToString()),long.Parse);} public double[] Da2{get{return Array.ConvertAll(Sp("0 "+Rl()+" 0"),double.Parse);}} public double[] Da3(string a,string b){return Array.ConvertAll(Sp(a+Rl()+b),double.Parse);} public T[] Arr(int n,Func f){var a=new T[n];for(int i=0;i(int n,Func f){var a=new T[n];for(int i=0;i(int n,Func f){var a=new T[n];for(int i=0;i(int n,Func f){var a=new T[n];for(int i=0;i(){var s=Sp(Rl());return (Ct(s[0]),Ct(s[1]));} [MethodImpl(MethodImplOptions.AggressiveInlining)] public (T,T,T) Tp3(){var s=Sp(Rl());return (Ct(s[0]),Ct(s[1]),Ct(s[2]));} [MethodImpl(MethodImplOptions.AggressiveInlining)] public (T,T,T,T) Tp4(){var s=Sp(Rl());return (Ct(s[0]),Ct(s[1]),Ct(s[2]),Ct(s[3]));} [MethodImpl(MethodImplOptions.AggressiveInlining)] public (T,T,T,T,T) Tp5(){var s=Sp(Rl());return (Ct(s[0]),Ct(s[1]),Ct(s[2]),Ct(s[3]),Ct(s[4]));} [MethodImpl(MethodImplOptions.AggressiveInlining)] public (T,T,T,T,T,T) Tp6(){var s=Sp(Rl());return (Ct(s[0]),Ct(s[1]),Ct(s[2]),Ct(s[3]),Ct(s[4]),Ct(s[5]));} [MethodImpl(MethodImplOptions.AggressiveInlining)] public (T1,T2) Tp2(){var s=Sp(Rl());return (Ct(s[0]),Ct(s[1]));} [MethodImpl(MethodImplOptions.AggressiveInlining)] public (T1,T1,T2) Tp3(){var s=Sp(Rl());return (Ct(s[0]),Ct(s[1]),Ct(s[2]));} } public class Scs:Sc{ private StreamReader sr; public Scs(string t){sr=new StreamReader(t);} [MethodImpl(MethodImplOptions.AggressiveInlining)] protected override string Rl(){return sr.ReadLine();} } public class Sc2:Sc{ private string[] sps=new string[]{" "," ","\t"}; [MethodImpl(MethodImplOptions.AggressiveInlining)] protected override string[] Sp(string st){return st.Split(sps,StringSplitOptions.RemoveEmptyEntries);} public override int I{get{return int.Parse(Sp(Rl())[0]);}} public override long L{get{return long.Parse(Sp(Rl())[0]);}} public override double D{get{return double.Parse(Sp(Rl())[0]);}} public override string S{get{return Sp(Rl())[0];}} } public class Scs2:Sc2{ private StreamReader sr; public Scs2(string t){sr=new StreamReader(t);} [MethodImpl(MethodImplOptions.AggressiveInlining)] protected override string Rl(){return sr.ReadLine();} } public class Sct:Sc{ private List li=new List(); private int l=0; public void Add(int s){li.Add(s.ToString());} public void Add(long s){li.Add(s.ToString());} public void Add(double s){li.Add(s.ToString());} public void Add(string s){li.Add(s.ToString());} public void Add(object s){li.Add(s.ToString());} public void Add(int[] s){li.Add(string.Join(" ",s));} public void Add(long[] s){li.Add(string.Join(" ",s));} public void Add(double[] s){li.Add(string.Join(" ",s));} public void Add(string[] s){li.Add(string.Join(" ",s));} public void Add(object[] s){li.Add(string.Join(" ",s));} protected override string Rl(){return li[l++];} public void Clear(){li.Clear();l=0;} }