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  1. #include <bits/stdc++.h>
  2. #include <stdio.h>
  3. using namespace std;
  4. #define int long long
  5. #define dd double
  6. #define ld long double
  7. #define ull unsigned long long
  8. #define yes cout << "YES\n"
  9. #define no cout << "NO\n"
  10. #define el "\n"
  11. #define Arwa ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  12. #define fix(x) cout << fixed << setprecision(x)
  13. #define all(v) v.begin(),v.end()
  14. #define mod 1000000007
  15. // checkprime 
  16. bool prime(int n) {
  17.     if (n == 2) return true;
  18.     if (n % 2 == 0 || n == 1) return false;
  19.     for (int i = 3; i * i <= n; i += 2)
  20.         if (n % i == 0) return false;
  21.         return true;
  22. }
  23. // Gcd
  24. int gcd(int a, int b) { return b == 0 ? a : gcd(b, a % b); }
  25.  
  26. // divisors
  27. vector<int>divisors;
  28. void GetDivisors(int n)
  29. {
  30.     for(int i=1;i*i<=n;i++)
  31.     {
  32.         if(n%i==0)
  33.         {
  34.             if(i==n/i)
  35.             divisors.push_back(i);
  36.             else
  37.             {
  38.             divisors.push_back(i);
  39.             divisors.push_back(n/i);
  40.             }
  41.         }
  42.     }
  43.     sort(all(divisors));
  44. }
  45. int ConverttoDecimal(string s,int BaseFrom)
  46. {
  47.  //1111000
  48.  int decimal=0,power=0;
  49.  for(int i=s.length()-1;i>=0;i--)
  50.  {
  51.    if(s[i]=='A')
  52.    decimal+=10*pow(BaseFrom,power);
  53.    else if(s[i]=='B')
  54.    decimal+=11*pow(BaseFrom,power);
  55.    else if(s[i]=='C')
  56.    decimal+=12*pow(BaseFrom,power);
  57.    else if(s[i]=='D')
  58.    decimal+=13*pow(BaseFrom,power);
  59.    else if(s[i]=='E')
  60.    decimal+=14*pow(BaseFrom,power);
  61.    else if(s[i]=='F')
  62.    decimal+=15*pow(BaseFrom,power);
  63.    else
  64.    decimal+=(s[i]-'0')*pow(BaseFrom,power);
  65.    power++;
  66.  }
  67.  return decimal;
  68. }
  69. string ConvertToBase(int decimal,int BaseTo)
  70. {
  71.   string Res="";
  72.   while(decimal!=0)
  73.   {
  74.    if(decimal%BaseTo==10)
  75.    Res=Res+'A';
  76.    else if(decimal%BaseTo==11)
  77.    Res=Res+'B';
  78.    else if(decimal%BaseTo==12)
  79.    Res=Res+'C';
  80.    else if(decimal%BaseTo==13)
  81.    Res=Res+'D';
  82.    else if(decimal%BaseTo==14)
  83.    Res=Res+'E';
  84.    else if(decimal%BaseTo==15)
  85.    Res=Res+'F';
  86.    else if(decimal%BaseTo==0)
  87.    Res=Res+'0';
  88.    else if(decimal%BaseTo==1)
  89.    Res=Res+'1';
  90.    else if(decimal%BaseTo==2)
  91.    Res=Res+'2';
  92.    else if(decimal%BaseTo==3)
  93.    Res=Res+'3';
  94.    else if(decimal%BaseTo==4)
  95.    Res=Res+'4';
  96.    else if(decimal%BaseTo==5)
  97.    Res=Res+'5';
  98.    else if(decimal%BaseTo==6)
  99.    Res=Res+'6';
  100.    else if(decimal%BaseTo==7)
  101.    Res=Res+'7';
  102.    else if(decimal%BaseTo==8)
  103.    Res=Res+'8';
  104.    else if(decimal%BaseTo==9)
  105.    Res=Res+'9';
  106.    decimal/=BaseTo;
  107.   }
  108.   string s="";
  109.   for(int i=Res.length()-1;i>=0;i--)
  110.   s=s+Res[i];
  111.   return s;
  112. }
  113. void HereWeGoAgain()
  114. { 
  115. }
  116. //اى ويل بريبير ماى بيبرز تو بى ذا بيست ان زيس وورلد
  117. int32_t main() 
  118. {
  119.     Arwa
  120.     int t=1;
  121.     string s;
  122.     int BaseFrom,BaseTo;
  123.     while(cin>>s>>BaseFrom>>BaseTo)
  124.     {  
  125.         string x=(ConvertToBase(ConverttoDecimal(s,BaseFrom),BaseTo));
  126.         cout<<right;
  127.         if(x.length()>7)
  128.         cout<<"ERROR\n";
  129.         else cout<<x<<el;
  130.     }
  131.  
  132.     return 0;
  133. }
  134.  
  135.  
Success #stdin #stdout 0s 5320KB
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https://ideone.com/oIx1Sf
language:
C++ (gcc 8.3)
created:
5 hours ago
visibility:
public

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