/*
君は瞬きと共に過ぎてく時間も
遠くから見てると微笑んで
 */
/*author::ღꦿ࿐(DeepSea.) */
#include<bits/stdc++.h>
#include<bits/extc++.h>
using namespace std;
#define ll long long
#define lll __int128_t
#define lb long double
#define D double
#define mkp make_pair
#define Array vector<int>
#define Pair pair<int,int>
#define rep(variable,leftrange,rightrange) for(int variable=leftrange;variable<=rightrange;++variable)
#define Rep(variable,leftrange,rightrange) for(int variable=leftrange;variable>=rightrange;--variable)
#define Find(a,b) (lower_bound(a.begin(),a.end(),b)-a.begin())
#define Uniq(v) v.erase(unique(v.begin(),v.end()),v.end())
#define All(x) x.begin(),x.end()
#define nxtl puts("")
#define sq(x) ((x)*(x))
#define Hash __gnu_pbds::gp_hash_table
#define PQ __gnu_pbds::priority_queue
#ifdef DEBUG
#define react puts("reacting now !")
#define debug(x) cout << #x << " = " <<  x << "\n" 
#define debug2(l,r) cout << "[" #l "," #r "] = [" << l << "," << r << "]\n" 
#define debug3(x,y,z) cout << "{" #x "," #y "," #z "} = " << "{" << x << "," << y << "," << z << "}\n"  
#define debug_vec(v) cout << #v": size= " << v.size() << "\nelement: " ; for(auto p:v)  cout << p << " " 
#define FileIO(x) 6
#else 
#define react 6 
#define debug(x) 6
#define debug2(l,r) 6
#define debug3(x,y,z) 6
#define debug_vec(v) 6
#define FileIO(x) freopen(#x".in","r",stdin);freopen(#x".out","w",stdout)
#endif 
namespace IO{
    #define MAXSIZE (1<<20)
    char *IO___p1=NULL,*IO___p2=NULL,IO___buf[MAXSIZE];
    #ifdef DEBUG
    #define gchar() getchar()
    #else
    #define gchar() (IO___p1==IO___p2&&(IO___p2=(IO___p1=IO___buf)+fread(IO___buf,1,MAXSIZE,stdin),IO___p1==IO___p2)?EOF:*IO___p1++)
    #endif
    inline void read(char *x){
        char ch=gchar();
        while(ch==' '||ch=='\n'||ch=='\r')ch=gchar();
        do *x++=ch,ch=gchar(); while(ch!=' '&&ch!='\n'&&ch!='\r');
        *x='\0';
    }
    template<typename _Tp>inline void read(_Tp &x){
        x=0;char ch=gchar();
        for(;!isdigit(ch);ch=gchar());
        for(;isdigit(ch);ch=gchar())x=(x<<1)+(x<<3)+(ch^48);
    }
    template<typename _Tp>inline void nread(_Tp &x){
        x=0;_Tp f=1;char ch=gchar();
        for(;!isdigit(ch);ch=gchar())ch=='-'&&(f=-1);
        for(;isdigit(ch);ch=gchar())x=(x<<1)+(x<<3)+(ch^48);
        x*=f;
    }
    template<typename _Tp,typename ...Args>
    inline void read(_Tp &x,Args &...args){read(x),read(args...);}
    template<typename _Tp,typename ...Args>
    inline void nread(_Tp &x,Args &...args){nread(x),nread(args...);}
    template<typename _Tp>inline void wrt(_Tp x){
        if(x<0)x=-x,putchar('-');
        if(x>9)wrt(x/10);
        putchar(x%10+48);
    }
    inline void wrt(char ch){putchar(ch);}
    inline void wrt(char *s){while(*s!='\0')putchar(*s++);}
    inline void wrt(const char *s){while(*s!='\0')putchar(*s++);}
    template<typename _Tp,typename ...Args>
    inline void wrt(_Tp x,Args ...args){wrt(x),wrt(args...);}
    inline void Read(pair<int,int> &x) { IO::read(x.first,x.second); }
    inline void Read(vector<int> &v,int n){v.resize(n);for(auto &p:v) IO::read(p);}
    inline void Wrt(pair<int,int> x,char c) { IO::wrt(x.first,' ',x.second,c); }
    inline void Wrt(vector<int> v,char c){for(auto p:v) IO::wrt(p,c);}    
    #undef MAXSIZE
}

template<typename _Tp>inline _Tp Min(_Tp x,_Tp y){return x<y?x:y;}
template<typename _Tp>inline _Tp Max(_Tp x,_Tp y){return x>y?x:y;}
template<typename _Tp>inline void Add(_Tp &x,_Tp y,_Tp p){x+=y,(x>=p) && (x-=p);}
template<typename _Tp>inline void upmax(_Tp &x,_Tp y){if(y>x)x=y;} 
template<typename _Tp>inline void upmin(_Tp &x,_Tp y){if(y<x)x=y;}
using namespace IO ;
const int N = 1000050;
using segset = vector < pair <int,int> > ;
segset s , t; 
int n ; 
int a[N] , x[N] ;
const int inf = 1e9 + 7 ; 
void Fix(segset &seg) {
    if(seg.empty( )) return ;
    sort(All(seg)) ;
    for(auto[l,r]:seg) {
        assert(l <= r);
        upmax(l,-inf) , upmin(r,inf) ;
    }
    int lp = inf + 1 , rp = -inf - 1 ;
    segset nw; 
    for(auto[l,r]:seg) {
        if(l > rp + 1) {
            if(lp <= rp) nw.emplace_back(lp , rp);
            lp = l , rp = r; 
        }
        upmax(rp , r);
    }
    if(lp <= rp) nw.emplace_back(lp , rp) ;
    seg = nw ;
}

signed main()
{
    // segset tmp = {{2 , 3} , {4 , 5} , {8 , 12} ,{2 , 3} , {2 , 2} , {3 , 3}};
    // Fix(tmp) ;
    // for(auto[l,r]:tmp) {
    //     wrt(l,' ',r,'\n') ;  
    // }
    read(n) ;


    rep(i,1,n) {
        nread(a[i] , x[i]) ;
    }
    s.emplace_back(0,0) ;
    t.emplace_back(0,0);
    
    rep(i,1,n) {
        segset S , T ;
        int tim = a[i] - a[i - 1] ;

        for(auto[l,r]:s) {
            // I : x[i - 1] , C:[l,r]       
           
            if(tim >= abs(x[i] - x[i - 1])) {
                // first : I go to the pos . dont change C 
                S.emplace_back(l,r);
                // second : I go to the pos . Change C
                auto [lp,rp] = minmax({x[i] , x[i - 1]});
                int rem = tim - abs(x[i] - x[i - 1]) ;
                S.emplace_back(lp - rem / 2 , rp + rem / 2);
                // I put C there And go away 
                T.emplace_back(x[i] - rem , x[i] + rem);
            }

            // C get the cake.
            if(l<=x[i]&&x[i]<=r) {
                T.emplace_back(x[i - 1] - tim , x[i - 1] + tim); 
            }

        }

        for(auto[l,r]:t) {
            // I : [l,r] , C    : x[i - 1]
            
            //  I just go there , in this problem (x distict) is unnecessary.

            // So Considering I go there and put another C in the path .
            // And Consider I put C there and Go away 

            if(l <= x[i] && x[i] <= r) {
                int lp = x[i] - tim ;
                if(lp < l) lp = l - (tim - (x[i] - l)) / 2;
                int rp = x[i] + tim ;
                if(rp > r) rp = r + (tim - (r - x[i])) / 2;
                S.emplace_back(lp , rp) ;

                lp = x[i] - tim ;
                rp = x[i] + tim ;
                T.emplace_back(lp , rp) ; 
            }
            
            if(x[i] < l && x[i] >= l - tim) {
                int lp = x[i] - (tim - (l - x[i]) ) / 2;
                int rp = x[i] + tim;
                if(rp > r) rp = r + (tim - (r - x[i])) / 2 ;
                S.emplace_back(lp , rp) ; 

                lp = x[i] - (tim - (l - x[i])) ;
                rp = x[i] + (tim - (l - x[i])) ;
                T.emplace_back(lp , rp) ; 
            }

            if(x[i] > r && x[i] <= r + tim) {
                int rp = x[i] + (tim - (x[i] - r)) / 2 ; 
                int lp = x[i] - tim ;
                if(lp < l) lp = l - (tim - (x[i] - l)) / 2 ;
                S.emplace_back(lp,rp) ;

                lp = x[i] - (tim - (x[i] - r)) ;
                rp = x[i] + (tim - (x[i] - r)) ;
                T.emplace_back(lp , rp) ; 
            }




        }

        
        s = S , t = T ;
        Fix(s) , Fix(t) ;
    }

    if(s.size( ) || t.size( )) puts("YES") ; else puts("NO") ;

    return 0;
}