Minimum Operations to Exceed Threshold Value I — C++

// Time:  O(n)
// Space: O(1)

// array
class Solution {
public:
    int minOperations(vector<int>& nums, int k) {
        return count_if(cbegin(nums), cend(nums), [&](const auto& x) {
            return x < k;
        });
    }
};