interview-prep/CppTips at main · m-siya/interview-prep · GitHub

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## Resources
https://codeforces.com/blog/entry/10124
https://codeforces.com/blog/entry/15643
https://codeforces.com/blog/entry/16262
https://codeforces.com/blog/entry/16262

### C++ 11
- use range based for loops. can be used for stl containers

```
vector< int > numbers = {2, 3, 5, 7};
for (auto& x : numbers)
    x *= 2;

for (auto x : numbers)
    cout << x << endl;
```

- lambda functions
```auto heights = vector< int >{ ...some values here... };

auto order = vector< int >(heights.size());

for (int i: range(heights.size()))
    order[i] = i;

sort(order.begin(), order.end(),
    [&] (const int& a, const& int b) -> bool {
        return heights[a] < heights[b];
    }
);
```