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 solution(const vector<int>& gas, const vector<int>& cost) { |
| 2 | |
| 3 | int n = gas.size(); |
| 4 | |
| 5 | int total = 0; |
| 6 | int tank = 0; |
| 7 | int start = 0; |
| 8 | |
| 9 | for (int i = 0; i < n; i++) { |
| 10 | |
| 11 | int gain = gas[i] - cost[i]; |
| 12 | |
| 13 | total += gain; |
| 14 | tank += gain; |
| 15 | |
| 16 | if (tank < 0) { |
| 17 | start = i + 1; |
| 18 | tank = 0; |
| 19 | } |
| 20 | } |
| 21 | |
| 22 | if (total < 0) { |
| 23 | return -1; |
| 24 | } |
| 25 | |
| 26 | return start; |
| 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.