#include<stdio.h>
#include<stdlib.h>
#include<ctype.h>

int main()
{
    char user[10],pass[10],o_user[]="admin",o_pass[]="admin";
    printf("Username: ");
    scanf("%s",user);
    printf("Password: ");
    scanf("%s",pass);
    
    if(strcmp(user,o_user)==0 && strcmp(pass,o_pass)==0)
    {
      printf("Enter new password: ");
      char np[10];
      scanf("%s",np);
      int i,letter_cnt=0, dig_cnt=0, sp_cnt=0;
      for(i=0;i<strlen(np);i++)
      {
          if(isdigit(np[i]))
            dig_cnt++;
          else if(isalpha(np[i]))
            letter_cnt++;
          else
            sp_cnt++;
      }
      if(sp_cnt>0 && letter_cnt>0 && dig_cnt>0 && strlen(np)>6)
         printf("New password is alright\n");
      else
       printf("Invalid new password\n");
      }
      else
      printf("Wrong password");
      system("pause");
}