https://qiita.com/tbpgr/items/6c75930566dda97bb5b6 の Kotlin 実装版。

fun ずんだ() = (1..10)
            .map { first -> (1..10).map { second -> Pair(first, second) } }
            .reduce { acc, list -> acc + list }
            .forEach { println("${it.first} + ${it.second}=${"~".repeat(it.first + it.second)}${it.first + it.second}") }

Whats zunda-san

結果

1 + 1=~~2
1 + 2=~~~3
1 + 3=~~~~4
1 + 4=~~~~~5
1 + 5=~~~~~~6
1 + 6=~~~~~~~7
1 + 7=~~~~~~~~8
1 + 8=~~~~~~~~~9
1 + 9=~~~~~~~~~~10
1 + 10=~~~~~~~~~~~11
2 + 1=~~~3
2 + 2=~~~~4
2 + 3=~~~~~5
2 + 4=~~~~~~6
2 + 5=~~~~~~~7
2 + 6=~~~~~~~~8
2 + 7=~~~~~~~~~9
2 + 8=~~~~~~~~~~10
2 + 9=~~~~~~~~~~~11
2 + 10=~~~~~~~~~~~~12
3 + 1=~~~~4
3 + 2=~~~~~5
3 + 3=~~~~~~6
3 + 4=~~~~~~~7
3 + 5=~~~~~~~~8
3 + 6=~~~~~~~~~9
3 + 7=~~~~~~~~~~10
3 + 8=~~~~~~~~~~~11
3 + 9=~~~~~~~~~~~~12
3 + 10=~~~~~~~~~~~~~13
4 + 1=~~~~~5
4 + 2=~~~~~~6
4 + 3=~~~~~~~7
4 + 4=~~~~~~~~8
4 + 5=~~~~~~~~~9
4 + 6=~~~~~~~~~~10
4 + 7=~~~~~~~~~~~11
4 + 8=~~~~~~~~~~~~12
4 + 9=~~~~~~~~~~~~~13
4 + 10=~~~~~~~~~~~~~~14
5 + 1=~~~~~~6
5 + 2=~~~~~~~7
5 + 3=~~~~~~~~8
5 + 4=~~~~~~~~~9
5 + 5=~~~~~~~~~~10
5 + 6=~~~~~~~~~~~11
5 + 7=~~~~~~~~~~~~12
5 + 8=~~~~~~~~~~~~~13
5 + 9=~~~~~~~~~~~~~~14
5 + 10=~~~~~~~~~~~~~~~15
6 + 1=~~~~~~~7
6 + 2=~~~~~~~~8
6 + 3=~~~~~~~~~9
6 + 4=~~~~~~~~~~10
6 + 5=~~~~~~~~~~~11
6 + 6=~~~~~~~~~~~~12
6 + 7=~~~~~~~~~~~~~13
6 + 8=~~~~~~~~~~~~~~14
6 + 9=~~~~~~~~~~~~~~~15
6 + 10=~~~~~~~~~~~~~~~~16
7 + 1=~~~~~~~~8
7 + 2=~~~~~~~~~9
7 + 3=~~~~~~~~~~10
7 + 4=~~~~~~~~~~~11
7 + 5=~~~~~~~~~~~~12
7 + 6=~~~~~~~~~~~~~13
7 + 7=~~~~~~~~~~~~~~14
7 + 8=~~~~~~~~~~~~~~~15
7 + 9=~~~~~~~~~~~~~~~~16
7 + 10=~~~~~~~~~~~~~~~~~17
8 + 1=~~~~~~~~~9
8 + 2=~~~~~~~~~~10
8 + 3=~~~~~~~~~~~11
8 + 4=~~~~~~~~~~~~12
8 + 5=~~~~~~~~~~~~~13
8 + 6=~~~~~~~~~~~~~~14
8 + 7=~~~~~~~~~~~~~~~15
8 + 8=~~~~~~~~~~~~~~~~16
8 + 9=~~~~~~~~~~~~~~~~~17
8 + 10=~~~~~~~~~~~~~~~~~~18
9 + 1=~~~~~~~~~~10
9 + 2=~~~~~~~~~~~11
9 + 3=~~~~~~~~~~~~12
9 + 4=~~~~~~~~~~~~~13
9 + 5=~~~~~~~~~~~~~~14
9 + 6=~~~~~~~~~~~~~~~15
9 + 7=~~~~~~~~~~~~~~~~16
9 + 8=~~~~~~~~~~~~~~~~~17
9 + 9=~~~~~~~~~~~~~~~~~~18
9 + 10=~~~~~~~~~~~~~~~~~~~19
10 + 1=~~~~~~~~~~~11
10 + 2=~~~~~~~~~~~~12
10 + 3=~~~~~~~~~~~~~13
10 + 4=~~~~~~~~~~~~~~14
10 + 5=~~~~~~~~~~~~~~~15
10 + 6=~~~~~~~~~~~~~~~~16
10 + 7=~~~~~~~~~~~~~~~~~17
10 + 8=~~~~~~~~~~~~~~~~~~18
10 + 9=~~~~~~~~~~~~~~~~~~~19
10 + 10=~~~~~~~~~~~~~~~~~~~~20