#include <stdio.h>

void main(void){
    int problemCount[4] = {0,0,0,0};
    for(int i = 0 ; i < 4 ; i++){
        scanf("%d",&problemCount[i]);
    }
    int resultTime = 0;
    for(int i = 0 ; i < 4 ; i++){
        int result = 0 ;
        scanf("%d",&result);
        resultTime += result*problemCount[i];
    }
    int answerTime = 0;
    scanf("%d",&answerTime);
    if(answerTime >= resultTime){
        printf("Yes");
    }else{
        printf("No");
    }
}