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  1. #include<bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. long long int high =0;
  6.  
  7. bool ok(long long int temp)
  8. {
  9.     if(temp%3==0 && temp%2==0)
  10.         return true;
  11.     else
  12.         return false;
  13. }
  14.  
  15. long long int check(string s, int j, int n)
  16. {
  17.    long long  int num=0;
  18.     for(int i=0; i<n; i++)
  19.     {
  20.  
  21.         if(i==j)
  22.             continue;
  23.         else
  24.             num = (10*num) + (s[i]-48);
  25.  
  26.     }
  27.  
  28.     if(ok(num) && num>high)
  29.     {
  30.         high = num;
  31.         return high;
  32.     }
  33.     else
  34.         return -1;
  35. }
  36.  
  37. int nod(int temp)
  38. {
  39.     int x=0;
  40.     while(temp!=0)
  41.     {
  42.         x++;
  43.         temp = temp/10;
  44.     }
  45.     return x;
  46. }
  47.  
  48. int main(void)
  49. {
  50. 	ios::sync_with_stdio(false); cin.tie(0);
  51.     int t; cin>>t;
  52.     while(t--)
  53.     {
  54.         high =0;
  55.         string s;
  56.         cin>>s;
  57.         long long int input=0;
  58.         for(int i=0; i<s.length(); i++)
  59.         {
  60.             input  = 10*input + (s[i]-48);
  61.         }
  62.         cout<<"input value: "<<input<<endl;
  63.  
  64.         int sl = s.length();
  65.  
  66.         long long int output=-1;
  67.         for(int i=0; i<s.length(); i++)
  68.         {
  69.             long long int temp;
  70.             temp = check(s, i, sl);
  71.  
  72.             if(temp!=-1)
  73.                 output = temp;
  74.         }
  75.  
  76.         if((nod(output)!=(nod(input)-1)) && output!=-1)
  77.         {
  78.             for(int i=0; i<((nod(input)-1)-nod(output)); i++)
  79.                 cout<<"0";
  80.             cout<<output<<endl;
  81.         }
  82.         else
  83.             cout<<output<<endl;
  84.  
  85.  
  86.     }
  87. 	return 0;
  88. }
  89.  
Success #stdin #stdout 0s 16056KB
comments (?)
stdin
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2
123
19631233333333333333
stdout
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input value: 123
12
input value: 1184489259623781717
-1
https://ideone.com/HErf8c
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
secret

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