1035 Password (20)

 #include <stdio.h>
 #include <string.h>
 struct MyStruct
 {
     char ID[];
     char Password[];
     bool changed;
 };
 int main()
 {
     int n,i,j;
     MyStruct User[];
     while(scanf("%d",&n)!=EOF)
     {
         for(i=;i<n;i++)
             User[i].changed=false;
         int count = ;
         for(i=;i<n;i++)
         {
             getchar();
             scanf("%s %s",User[i].ID,User[i].Password);
             int fir=;
             for(j=;j<strlen(User[i].Password);j++)
             {

                 if(User[i].Password[j]==''||User[i].Password[j]==''||User[i].Password[j]=='l'||User[i].Password[j]=='O')
                 {
                     if(fir)
                     {
                         fir=;
                         ++count;
                     }
                     if(User[i].Password[j]=='') User[i].Password[j]='@';
                     else if(User[i].Password[j]=='') User[i].Password[j]='%';
                     else if(User[i].Password[j]=='l') User[i].Password[j]='L';
                     else if(User[i].Password[j]=='O') User[i].Password[j]='o';
                     User[i].changed=true;
                 }

             }
         }

         if(count>)
         {
             printf("%d\n",count);
              for(i=;i<n;i++)
                  if(User[i].changed)
                      printf("%s %s\n",User[i].ID,User[i].Password);
         }
         else
         {
             if(n==) printf("There is 1 account and no account is modified\n");
             else printf("There are %d accounts and no account is modified\n",n);
         }
     }
     return ;
 }