Çàäà÷à . Ï145

var x, a, b, d: longint;
begin
  readln(x);
  a := 0; b := 10;
  while x > 0 do begin
    d := x mod 7;
    if d > a then a := d;
    if d < b then b := d;
    x := x div 7
  end;
  writeln(a+b)
end. 

#include <iostream>
using namespace std;
int main()  
{
  int x, a, b, d;
  cin >> x;
  a = 0; b = 10;
  while (x > 0) {
    d = x % 7;
    if (d > a) a = d;
    if (d < b) b = d;
    x = x / 7;
    }
  cout << (a+b);
  return 0;
}