#include<stdio.h>
int main(){
    int i,n,key;
    scanf("%d",&n);
    int arr[n];
    for(i=0;i<n;i++){
        scanf("%d",&arr[i]);
        scanf("%d",&key);
    }
    scanf("%d",&position);
    for(i=0;i<n;i++){ 
        if(arr[i]==key){
            printf("element found %d\n");
            found =1;
            break;
        }
    }
    if(!found){
        printf("element not found");
    }
   return 0;
}