#include <stdio.h>
int count;
int hoge(int n){
if(n<0) return 1;
else {
return 4*hoge(n-1)+hoge(n-2);
count++;
}
}
int main(){
return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+CmludCBjb3VudDsKaW50IGhvZ2UoaW50IG4pewppZihuPDApIHJldHVybiAxOwplbHNlIHsKcmV0dXJuIDQqaG9nZShuLTEpK2hvZ2Uobi0yKTsKY291bnQrKzsKfQp9CmludCBtYWluKCl7CnByaW50ZigiJWQiLCBob2dlKC0xMCkpOwpwcmludGYoIiVkIixjb3VudCk7CnJldHVybiAwOwp9