Java

import java.util.*;
import java.util.Scanner;

public class firstFit
{
    public static void main(String[] args) {
        
          Scanner keyboard = new Scanner(System.in);
          int[] blocks;             
          blocks = new int[3];      
          blocks[0] = 700; 
          blocks[1] = 850; 
          blocks[2] = 610; 
          //blocks[3] = 300;
          //Arrays.sort(blocks);
         
                       
          int[] jobs = new int[3];      
          
          //int index;
          
          System.out.println("Enter 3 jobs:");
          for(int index = 0; index < 3; index++){
              if(keyboard.hasNextInt()) jobs[index] = keyboard.nextInt();
            }
          
          for(int j=0; j<3;j++){
              for(int i=0; i<3; i++){
                  if(jobs[j] <= blocks[i]){
                      blocks[i]=j;
                      boolean wasAssigned[] = new boolean[blocks[i]=j];
                      System.out.println("Job" + jobs[j] + " in memory" + blocks[i]);
                      break;
                      }
                       else if(jobs[j] > blocks[i]){
                      System.out.println("Jobs in waiting queue " + jobs[j]);
                                            
                    }
                    
                }
            }       
          
        }    
}