# How to store Data Triplet in a Vector in C++?

Given a vector, how can we store 3 elements in one cell of vector.

Examples:

```Input : 2 5 10
3 6 15
Output : (2, 5, 10)  // In first cell of vector
(3, 6, 15)  // In second cell of vector
```

## Recommended: Please try your approach on {IDE} first, before moving on to the solution.

One solution is to create a user defined class or structure. We create a structure with three members, then create a vector of this structure.

 `// C++ program to store data triplet in a vector ` `// using user defined structure. ` `#include ` `using` `namespace` `std; ` ` `  `struct` `Test ` `{ ` `   ``int` `x, y, z; ` `}; ` ` `  `int` `main() ` `{ ` `    ``// Creating a vector of Test ` `    ``vector myvec; ` ` `  `    ``// Inserting elements into vector. First ` `    ``// value is assigned to x, second to y ` `    ``// and third to z. ` `    ``myvec.push_back({2, 31, 102}); ` `    ``myvec.push_back({5, 23, 114}); ` `    ``myvec.push_back({9, 10, 158}); ` ` `  `    ``int` `s = myvec.size(); ` `    ``for` `(``int` `i=0;i

Output :

```2, 31, 102
5, 23, 114
9, 10, 158
```

Another solution is to use pair class in C++ STL. We make a pair with first element as normal element and second element as another pair, therefore storing 3 elements simultaneously.

 `// C++ program to store data triplet in a vector ` `// using pair class ` `#include ` `using` `namespace` `std; ` ` `  `int` `main() ` `{ ` `    ``// We make a pair with first element as normal ` `    ``// element and second element as another pair. ` `    ``// therefore 3 elements simultaneously. ` `    ``vector< pair<``int``, pair<``int``, ``int``> > > myvec; ` ` `  `    ``// For inserting element in pair use ` `    ``// make_pair(). ` `    ``myvec.push_back(make_pair(2, make_pair(31, 102))); ` `    ``myvec.push_back(make_pair(5, make_pair(23, 114))); ` `    ``myvec.push_back(make_pair(9, make_pair(10, 158))); ` ` `  `    ``int` `s = myvec.size(); ` `    ``for` `(``int` `i=0; i

Output:

```2, 31, 102
5, 23, 114
9, 10, 158
```

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