Type an input and write what you think is the output . Each problem is converted to Web Assembly, so any possible input will show the corresponding output. Only correct predictions count.
Locked until you have predicted 3 outputs correctly.
| 1 | int squares(int n) { |
| 2 | |
| 3 | int sum = 0; |
| 4 | |
| 5 | while (n > 0) { |
| 6 | |
| 7 | int d = n % 10; |
| 8 | |
| 9 | sum += d * d; |
| 10 | n = n / 10; |
| 11 | } |
| 12 | |
| 13 | return sum; |
| 14 | } |
| 15 | |
| 16 | bool solution(int n) { |
| 17 | |
| 18 | int slow = n; |
| 19 | int fast = n; |
| 20 | |
| 21 | do { |
| 22 | slow = squares(slow); |
| 23 | fast = squares(squares(fast)); |
| 24 | } while (slow != fast); |
| 25 | |
| 26 | return slow == 1; |
| 27 | } |
Names have been stripped. The signature is the only clue you get for free. Compiled as C++20 with the standard headers and using namespace std; already in scope.