print(['No', 'Yes'][all(map((5).__eq__, [int(input()) for _ in range(int(input()))]))])
res = 'No'
for _ in range(int(input())):
if int(input()) != 5:
break
else:
res = 'Yes'
print(res)
#include <iostream>
int main() {
int[] a ={5,5,5,5,5,4,5};
int[] b = {5,5,5,5,5,5};
private const char * c(int[] input){
int isnotf =0;
for(i=sizeof(input)/sizeof(input[0]);i!=0;i--){
if(input[i]!=Null){
if(input[i] != 5){
isnotf=1;
}
}
}
if(isnotf==0){
return "Yes";
} else if(isnotf==1){
return "No";
}
return 0;
}
print("есть 4"+c(a)) ;
print("все 5"+c(b));
}