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 | bool solution(const string& s) { |
| 2 | |
| 3 | int low = 0; |
| 4 | int high = 0; |
| 5 | |
| 6 | for (char c : s) { |
| 7 | |
| 8 | if (c == '(') { |
| 9 | low++; |
| 10 | high++; |
| 11 | |
| 12 | } else if (c == ')') { |
| 13 | low--; |
| 14 | high--; |
| 15 | |
| 16 | } else { |
| 17 | low--; |
| 18 | high++; |
| 19 | } |
| 20 | |
| 21 | if (high < 0) { |
| 22 | return false; |
| 23 | } |
| 24 | |
| 25 | if (low < 0) { |
| 26 | low = 0; |
| 27 | } |
| 28 | } |
| 29 | |
| 30 | return low == 0; |
| 31 | } |
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.