#pragma GCC optimize ( "O3" )
#pragma GCC optimize( "unroll-loops" )
#pragma GCC target ( "sse4.2,fma,avx2,popcnt,lzcnt,bmi2" )
#include <bits/stdc++.h>
using namespace std;

#define UNTIE ios_base::sync_with_stdio( false ); cin.tie( nullptr )
#define TYPE_OF( VAR ) decay_t<decltype( VAR )>
#define CEXPR( LL , BOUND , VALUE ) constexpr LL BOUND = VALUE
#define CIN( LL , A ) LL A; cin >> A 
#define ASSERT( A , MIN , MAX ) assert( MIN <= A && A <= MAX ) 
#define CIN_ASSERT( A , MIN , MAX ) CIN( TYPE_OF( MAX ) , A ); ASSERT( A , MIN , MAX )
#define QUIT return 0
#define COUT( ANSWER ) cout << ( ANSWER ) << "\n"
#define RETURN( ANSWER ) COUT( ANSWER ); QUIT

int main()
{
  CEXPR( int , bound , 20 );
  CIN_ASSERT( N , - bound , bound );
  string answer[bound+1] =
    {
      "1/10" ,
      "-1/100" ,
      "-9/1000" ,
      "19/10000" ,
      "71/100000" ,
      "-261/1000000" ,
      "-449/10000000" ,
      "3059/100000000" ,
      "1431/1000000000" ,
      "-32021/10000000000" ,
      "17711/100000000000" ,
      "302499/1000000000000" ,
      "-479609/10000000000000" ,
      "-2545381/100000000000000" ,
      "7341471/1000000000000000" ,
      "18112339/10000000000000000" ,
      "-91527049/100000000000000000" ,
      "-89596341/1000000000000000000" ,
      "1004866831/10000000000000000000" ,
      "-108903421/100000000000000000000" ,
      "-9939764889/1000000000000000000000"
    };
  RETURN( N > 0 ? "0/1" : answer[-N] );
}