| 95 | } |
| 96 | |
| 97 | vector<int> func13(string str, vector<int> &values) |
| 98 | { |
| 99 | int num = stoi(str); |
| 100 | int a, b; |
| 101 | b = num % 10; |
| 102 | num /= 10; |
| 103 | a = num % 10; |
| 104 | num /= 10; |
| 105 | |
| 106 | vector<int> vec; |
| 107 | |
| 108 | for (int i = 0; i < values.size(); i++) |
| 109 | { |
| 110 | // Subtract the last two digits from four times the rest. The result must be divisible by 13. |
| 111 | if ((abs(b * 10 + i - 4 * a)) % 13 == 0 && values[i] == 0) |
| 112 | { |
| 113 | vec.push_back(i); |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | return vec; |
| 118 | } |
| 119 | |
| 120 | vector<int> func17(string str, vector<int> &values) |
| 121 | { |