#include #include #include #include #include #include #include #include using namespace std; #define FOR(i,a,b) for (int i=(a);i<(b);i++) #define RFOR(i,a,b) for (int i=(b)-1;i>=(a);i--) #define REP(i,n) for (int i=0;i<(n);i++) #define RREP(i,n) for (int i=(n)-1;i>=0;i--) #define INF 1<<30 #define MP make_pair #define mp make_pair #define pb push_back #define PB push_back #define DEBUG(x) cout<<#x<<": "<>n; ll m[n]; REP(i,n){ int g,d;cin>>g>>d; m[i]=g-30000*d; } ll ma=0; int dx=0; REP(i,n){ if(ma=3000000){ cout<<"YES"<