9095 1,2,3 더하기 문제풀이 #include using namespace std; void fast_io(void) { ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); } int n,t,arr[12]; int main(void) { fast_io(); cin >> t; arr[1] = 1; arr[2] = 2; arr[3] = 4; for (int i = 4; i > n; cout