# Quickly check if two STL vectors contain same elements or not

Unlike normal C/C++ arrays, we don’t need to do element by element comparison to find if two given vectors contain same elements or not.

In case of vectors, the operator “==” is overloaded to find the result quickly. Below is an example to demonstrate same.

`// C++ implementation to check whether elements ` `// in vector is equal or not ` `#include<bits/stdc++.h> ` `using` `namespace` `std; ` ` ` `// Check if all elements is equal or not ` `int` `main() ` `{ ` ` ` `// Comparing equal vectors ` ` ` `vector<` `int` `> v1{3, 1, 2, 3}; ` ` ` `vector<` `int` `> v2{3, 1, 2, 3}; ` ` ` `(v1 == v2)? cout << ` `"Equal\n"` `: cout << ` `"Not Equal\n"` `; ` ` ` ` ` `// Comparing non-equal vectors ` ` ` `vector<` `int` `> v3{1, 2, 3, 4}; ` ` ` `(v1 == v3)? cout << ` `"Equal\n"` `: cout << ` `"Not Equal\n"` `; ` ` ` ` ` `// comparing with empty ` ` ` `vector<` `int` `> v4; ` ` ` `(v1 == v4)? cout << ` `"Equal\n"` `: cout << ` `"Not Equal\n"` `; ` ` ` ` ` `// comparing two empty ` ` ` `vector<` `int` `> v5; ` ` ` `(v5 == v4)? cout << ` `"Equal\n"` `: cout << ` `"Not Equal\n"` `; ` ` ` ` ` `return` `0; ` `} ` |

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Output :

Equal Not Equal Not Equal Equal

This article is contributed by **Sachin Bisht**. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

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