Solution.cpp

class Solution {
public:
    vector<int> closestDivisors(int num) {
        auto f = [](int x) {
            for (int i = sqrt(x);; --i) {
                if (x % i == 0) {
                    return vector<int>{i, x / i};
                }
            }
        };
        vector<int> a = f(num + 1);
        vector<int> b = f(num + 2);
        return abs(a[0] - a[1]) < abs(b[0] - b[1]) ? a : b;
    }
};