- #include <iostream> 
- #include <vector> 
-   
- int main () { 
-     std::vector<int> vec {1, 2, 3, 4, 5, 6, 7, 8, 9}; 
-     auto it = vec.begin(); 
-     vec.insert(it + 3, 10); 
-     for (auto x: vec) std::cout << ' ' << x; 
- } 
-   
- //https://pt.stackoverflow.com/q/110841/101 
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