#include <stdio.h>

#define MAX_CUSTOMERS 100

int main()

{

       // declare variables

       int numCommands, i, accounts[MAX_CUSTOMERS];

       int command, id, amount, j, ok;

       char filename[20];

       /***Declare File Pointer***/

       FILE *ifp;



       // Open file.

       printf("What is the name of the file?\n");

       scanf("%s", filename);

       /***Open Input File***/

       ifp= fopen(filename, "r");

       // Initialize accounts.

       /***Set all values in accounts to zero***/



       for(i=0;i<MAX_CUSTOMERS;i++)

       {

              accounts[i]=0;

       }

       command=0;

       amount=0;

       numCommands=0;

       j=0;

       i=0;

       // Read the number of commands from the file

       fscanf(ifp, "%d", &numCommands);



       // Process each command.

       for (i=0; i<numCommands; i++)

       {



              // Get type of this command.

              /***Read command value from file***/

              fscanf(ifp, "%d", &command);





              // Add money.

              if (command == 1)

              {

                     /***Read id and amount from file***/

                     fscanf(ifp, "%d %d", &id, &amount);

                     accounts[id] += amount;

              }



              // Subtract money.

              else if (command == 2)

              {

                     fscanf(ifp, "%d %d", &id, &amount);

                     /***Deduct amount from the account with identification number id***/

                     accounts[id] -= amount;

              }



              // Print delinquents.

              else

              {

                     // Go through each account, flagging negative balances.

                     ok = 1;

                     for (j=0; j<MAX_CUSTOMERS; j++)

                     {

                           if (/***check if jth account is less than zero***/ accounts[j]<0)

                           {

                                  printf("Customer %d, you owe $%d. Please pay immediately!\n", j, -accounts[j]);

                                  ok = 0;

                           }

                     }



                     // Best case scenario.

                     if (ok)

                     {

                           printf("All accounts are paid up to date!!!\n");

                     }



              }

       }



       /***close file pointer***/

       fclose(ifp);

       return 0;

}