#include<stdio.h> //是头文件的问题吗
int main(){
//freopen("zpi.in","r",stdin);
//freopen("zpi.out","w",stdout); 这两句可省略
int high[10],touch,ans=0;
for(int i=0;i<10;i++) scanf("%d ",&high[i]);
scanf("%d",&touch);
for(int i=0;i<10;i++){
if(high[i]<=touch+30){
ans+=1;
}
}
printf("%d",ans);
return 0;
}