#include <iostream>
using namespace std;

int main()
{
     int max, arr[] = {15,3,11,7,3,10,5,6,77,55,13};
     if((arr[0] % 2) == 0)  
     {
         cout<<"Maximum number is not found ";
         system("pause");
         return 0;
     }
     else max = arr[0];

     for(int i = 1; i < sizeof(arr)/sizeof(arr[0])-1; i++)
     {
         if((arr[i] % 2) == 0)  
         break;
         if(arr[i] > max)
         {
         max = arr[i];
         }
     }
     cout << "Maximum number is "<<max<<endl;
     system("pause");
     return 0;
}

#include <iostream>
using namespace std;
int main (void)
{
     int n, q, t;  
     bool c;
     char *str;
     str=new char[1];
     str[0]='\0';
     char num[]="01234567890";
     cout << "Input your string:";
     cin >> str;
     n=strlen(str);
     q=strlen(num);
     for (int i=0; i<n; i++)
     {
         for (int j=0; j<q; j++)
         {
                   if(str[i]!=num[j])
                   {                    
                        str[i]=num[i];
                        break;
                   };
         };
     };
  cout << str;
  cin.get();
  cin.get();
  return 0;
}  

#include <stdio.h>
#include <string.h>;
#include <ctype.h>

int main()
{
     char str[30];
     char tmp;
     int str_length = 0;
     int num_of_digits = 0;

     scanf("%s",str);
     str_length = strlen(str);

     for(int i = 0; i<str_length; i++)
         if(isdigit(str[i])) num_of_digits++;

     sprintf(&tmp,"%d",num_of_digits);
     
     for(int i = 0; i<str_length; i++)
         if(!isdigit(str[i]))
         {
             str[i] = tmp;
         }
        

     printf("%s",str);
     return 0;
}

#include <stdio.h>
#include <string.h>;

int main()
{
     char str[30];

     char tmp[2];
     int str_length = 0;
     int num_of_letters = 0;

     scanf("%s",str);

     str_length = strlen(str);

     for(int i = 0; i<str_length; i++)
     {
         if(str[i]<0x3A) continue;
         num_of_letters++;
     }

     sprintf(tmp, "%d", num_of_letters);

     for(int i = 0; i<str_length; i++)
     {
         if(str[i]>0x39) str[i] = tmp[0];
     }

     printf("%s",str);
     return 0;
}

int main (void)
double omg (blablabla)

#include <iostream>
using namespace std;
int main (void)
{
     int n, q, t=0;  
     char *str;
     str=new char[1];
     str[0]='\0';
     char num[]="0123456789";
     cout << "Input your string:";
     cin >> str;
     n=strlen(str);
     q=strlen(num);
     for(int i=0; i<n; i++)
     {
             for(int j=0; j<q; j++)
             {
                 if(str[i]==num[j])
                 {
                    t+=1;
                    break;
                 };
             };
     };
     for(int i=0; i<n; i++)
     {
         for(int j=0; j<q; j++)
         {   
             Вот тут чего писать?0о              
         };    
     };
     cout << str << endl;
     cout << t;
  cin.get();
  cin.get();
  return 0;
}