Give it an input and say what you think comes back. It compiles and runs for real, so a wrong guess still shows you the answer — probe as much as you like. Only correct predictions count.
Locked until you have predicted 4 outputs correctly.
| 1 | double helper(double x, long long e) { |
| 2 | if (e == 0) return 1.0; |
| 3 | double half = helper(x, e / 2); |
| 4 | if (e % 2 == 0) return half * half; |
| 5 | return half * half * x; |
| 6 | } |
| 7 | |
| 8 | double solution(double x, int n) { |
| 9 | long long e = n; |
| 10 | if (e < 0) return 1.0 / helper(x, -e); |
| 11 | return helper(x, e); |
| 12 | } |
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.