cdfrcs-A

#include<stdio.h>

struct contestant
{
    char str[20];
    int before;
    int after ;
};
typedef struct contestant handler ;


int increase(int before , int after)
{
    int inc=0 ;
    if(before>=2400&&after<=4000&&before>=-4000&&after>before)
    {
        inc=1;
    }
    return inc ;
}

int main()
{
    int test , i =0 , red_tem=0 , increase_tem=0 ;
    handler man[120];

    scanf("%d",&test);
    while(i<test)
    {
        scanf("%s ",man[i].str);
        scanf("%d %d",&man[i].before , &man[i].after);
        i++ ;
    }


    for(i=0 ; i<test ; i++)
    {
        increase_tem = increase(man[i].before , man[i].after);
        if(increase_tem)
        {
            printf("YES\n");
            exit(1);
        }
    }
    printf("NO\n");


    return 0 ;
}