# 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++14

`// 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;` `}` |

**Output: **

Equal Not Equal Not Equal Equal

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