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 | int solution(const vector<int>& nums) { |
| 2 | if (nums.empty()) return 0; |
| 3 | int left = 0; |
| 4 | int right = nums.size() - 1; |
| 5 | int best = 0; |
| 6 | while (left < right) { |
| 7 | int height = min(nums[left], nums[right]); |
| 8 | int area = height * (right - left); |
| 9 | if (area > best) best = area; |
| 10 | if (nums[left] < nums[right]) left++; |
| 11 | else right--; |
| 12 | } |
| 13 | return best; |
| 14 | } |
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.