class Pascal {
  method pascal(i : Int; j : Int) : Int =
    if (i == 1) || (j == 1) || (i == j) then 1
    else this.pascal(i - 1; j - 1) + this.pascal(i - 1; j)

  method triangle0(n : Int; i : Int; j : Int) : Int = {
    printInt(this.pascal(i; j));
    if i == j then 0 else printChar(32)
    return 
      if n == i then
        if i == j then true
        else this.triangle0(n; i; j + 1)
      else
        if i == j then { printChar(10) return this.triangle0(n; i + 1; 1) }
        else this.triangle0(n; i; j + 1)
  }
  
  method triangle(n : Int) : Int = this.triangle0(n ; 1 ; 1)
}

new Pascal.triangle(10)