W solution using c
IntuitionApproachComplexity
Time complexity:

Space complexity:
Code
# Intuition
<!-- Describe your first thoughts on how to solve this problem. -->

# Approach
<!-- Describe your approach to solving the problem. -->

# Complexity
- Time complexity:
<!-- Add your time complexity here, e.g. $$O(n)$$ -->

- Space complexity:
<!-- Add your space complexity here, e.g. $$O(n)$$ -->

# Code
```cpp []
class Solution {
public:
    string convertToBase7(int num) {
        int nn=0,mul=1;
        while(num!=0)
        {
            nn+=mul*(num%7);
            num/=7;
            mul*=10;
        }
        return to_string(nn);
    }
};
```
['C++']