// ジャッジの動作確認用
#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] =
    {
      "1000000/10000000" ,
      "-1000000/100000000" ,
      "-90/10000" ,
      "190/100000" ,
      "710/1000000" ,
      "-2610/10000000" ,
      "-4490/100000000" ,
      "30590/1000000000" ,
      "14310/10000000000" ,
      "-320210/100000000000" ,
      "177110/1000000000000" ,
      "3024990/10000000000000" ,
      "-4796090/100000000000000" ,
      "-25453810/1000000000000000" ,
      "73414710/10000000000000000" ,
      "181123390/100000000000000000" ,
      "-915270490/1000000000000000000" ,
      "-895963410/10000000000000000000" ,
      "10048668310/100000000000000000000" ,
      "-1089034210/1000000000000000000000" ,
      "-99397648890/10000000000000000000000"
    };
  RETURN( N > 0 ? "0/10000000000000000000000000000000000000" : answer[-N] );
}