#include<stdio.h>
int main()
{
int i,n,a,j,k;
while(scanf("%d",&n)!=EOF){
j=0;
for(i = 0;i < n;i++){
scanf("%d",&a);
if(a>j)j=a;
}
if(j<10)k=1;
else if(j>=20)k=3;
else k=2;
printf("%d\n",k);
}
return 0;
}
int main()
{
int i,n,a,j,k;
while(scanf("%d",&n)!=EOF){
j=0;
for(i = 0;i < n;i++){
scanf("%d",&a);
if(a>j)j=a;
}
if(j<10)k=1;
else if(j>=20)k=3;
else k=2;
printf("%d\n",k);
}
return 0;
}
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