#include<stdio.h>
#include<stdlib.h>
main(){
int n,grade=0,a,i;
while(scanf("%d",&n)!=EOF){
grade=0;
for(i=0;i<n;i++){
scanf("%d",&a);
grade=grade+a;
}
if(grade<=59*n) printf("yes\n");
else printf("no\n");
}
return 0;
}
全站熱搜
留言列表