// Internet ADSL
# include <stdio.h>
# include <conio.h>

void main (void)
{
  int pin[10][3],i,j,sum_time, sum_money, count;
  float profit_p;
  printf("---------- INTERNET ADSL Network -------\n");
  // No1
  for (i=0;i<10;i++)
  { printf("\nContract No %d",i+1);
    for (j=0;j<3;j++)
    {
      if(j==0)
      {
        printf("\nTelephone Number:");
        scanf("%d",&pin[i][j]);
      }
      else if(j==1)
           {
             printf("\n Give INTERNET time (minutes):");
             scanf("%d",&pin[i][j]);
           }
      }
  }

// No 2
 for (i=0;i<10;i++)
 {
  pin[i][2]=0.5*pin[i][1]/60;
 }

// No3
 printf("\nTelephone         Time             Cost");
 for (i=0;i<10;i++)
 {
  printf("\n");
  for (j=0;j<3;j++)
  {
   printf("%d\t\t",pin[i][j]);
  }
 }

//No4
 sum_time=0;
 sum_money=0;
 for (i=0;i<10;i++)
 {
  sum_time=sum_time+pin[i][1];
  sum_money=sum_money+pin[i][2];
 }
 printf("\n Total INTERNET time %d (min) with the cost of %d Euro",sum_time, sum_money);

//No5
 count=0;
 for (i=0;i<10;i++)
 {
   if(pin[i][2] > 20)
   {
     printf("\nTelephone Number %d can make profit with ADSL - Please contact",pin[i][0]);
     count += 1;
   }
 }
//No 6
 profit_p=0;
 profit_p = count*10;
 printf("\n\n Profit %d lines out of 10. Equals %.2f%",count, profit_p);
 getch();
}