# Print 2-D co-ordinate points in ascending order followed by their frequencies

Given two arrays x[] and y[] where x[i] represents the x coordinate and y[i] represent the corresponding y coordinate of a 2-D point, the task is to print the coordinate points in ascending order followed by their frequencies.
Examples:

Input: x[] = {1, 2, 1, 1, 1}, y[] = {1, 1, 3, 1, 3}
Output:
1 1 2
1 3 2
2 1 1
Input: x[] = {-1, 2, 1, -1, 2}, y[] = {-1, 1, -3, -1, 3}
Output:
-1 -1 2
1 -3 1
2 1 1
2 3 1

Approach: The idea is to use a map having key as pair (x[i], y[i]), and mapped value as integer frequency of the same point. Key-value will store the pair of coordinates and the mapped value will store their respective frequencies.
Below is the implementation of the above approach:

 `// C++ implementation of the approach` `#include ` `using` `namespace` `std;`   `// Function to print the coordinates along with` `// their frequency in ascending order` `void` `Print(``int` `x[], ``int` `y[], ``int` `n)` `{`   `    ``// map to store the pairs` `    ``// and their frequencies` `    ``map, ``int``> m;`   `    ``// Store the coordinates along` `    ``// with their frequencies` `    ``for` `(``int` `i = 0; i < n; i++)` `        ``m[make_pair(x[i], y[i])]++;`   `    ``map, ``int``>::iterator i;`   `    ``for` `(i = m.begin(); i != m.end(); i++) {` `        ``cout << (i->first).first << ``" "` `             ``<< (i->first).second << ``" "` `             ``<< i->second << ``"\n"``;` `    ``}` `}`   `// Driver code` `int` `main()` `{` `    ``int` `x[] = { 1, 2, 1, 1, 1 };` `    ``int` `y[] = { 1, 1, 3, 1, 3 };` `    ``int` `n = ``sizeof``(x) / ``sizeof``(``int``);`   `    ``Print(x, y, n);`   `    ``return` `0;` `}`

 `# Python3 implementation of the approach`   `# Function to print the coordinates along with` `# their frequency in ascending order` `def` `Print``(x, y, n):`   `    ``# map to store the pairs` `    ``# and their frequencies` `    ``m ``=` `dict``()`   `    ``# Store the coordinates along` `    ``# with their frequencies` `    ``for` `i ``in` `range``(n):` `        ``m[(x[i], y[i])] ``=` `m.get((x[i], ` `                                 ``y[i]), ``0``) ``+` `1`   `    ``e ``=` `sorted``(m)` `    `  `    ``for` `i ``in` `e:` `        ``print``(i[``0``], i[``1``], m[i])`   `# Driver code` `x ``=` `[``1``, ``2``, ``1``, ``1``, ``1``]` `y ``=` `[``1``, ``1``, ``3``, ``1``, ``3``]` `n ``=` `len``(x)`   `Print``(x, y, n)`   `# This code is contributed ` `# by mohit kumar`

 `// C# implementation of ` `// the above approach` `using` `System;` `using` `System.Collections.Generic;` `class` `GFG{`   `public` `class` `store : ` `       ``IComparer>` `{` `  ``public` `int` `Compare(KeyValuePair<``int``,` `                                  ``int``> x, ` `                     ``KeyValuePair<``int``,` `                                  ``int``> y)` `  ``{` `    ``if``(x.Key != y.Key)` `    ``{` `      ``return` `x.Key.CompareTo(y.Key);    ` `    ``}` `    ``else` `    ``{` `      ``return` `x.Value.CompareTo(y.Value);    ` `    ``}`   `  ``}` `}`   `// Function to print the ` `// coordinates along with` `// their frequency in ` `// ascending order` `static` `void` `Print(``int` `[]x, ` `                  ``int` `[]y, ``int` `n)` `{` `  ``// Map to store the pairs` `  ``// and their frequencies` `  ``SortedDictionary, ``int``> m = ` `        ``new` `SortedDictionary,` `                                          ``int``>(``new` `store());`   `  ``// Store the coordinates along` `  ``// with their frequencies` `  ``for` `(``int` `i = 0; i < n; i++)` `  ``{` `    ``KeyValuePair<``int``,` `                 ``int``> tmp = ` `       ``new` `KeyValuePair<``int``,` `                        ``int``>(x[i], y[i]);` `    `  `    ``if``(m.ContainsKey(tmp))` `    ``{` `      ``m[tmp]++;` `    ``}` `    ``else``{` `      ``m[tmp] = 1;` `    ``}` `  ``}`   `  ``foreach``(KeyValuePair, ``int``> i ``in` `m)` `  ``{` `    ``Console.Write(i.Key.Key + ``" "` `+ ` `                  ``i.Key.Value + ``" "` `+ ` `                  ``i.Value + ``"\n"``);` `  ``}` `}`   `// Driver code` `public` `static` `void` `Main(``string``[] args) ` `{` `  ``int` `[]x = {1, 2, 1, 1, 1};` `  ``int` `[]y = {1, 1, 3, 1, 3};` `  ``int` `n = x.Length;` `  ``Print(x, y, n);` `}` `}`   `// This code is contributed by rutvik_56`

Output:
```1 1 2
1 3 2
2 1 1

```

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