Add files via upload

Author: javaarchive

usacotools.java

@@ -309,6 +309,7 @@ public static int classify(char x,char off,char on) {
 
         }
         public static long slowfib(long num){
+        	//Slow recursion fibonnaci
     	if(num<=1) {
     		return num;
     	}
@@ -317,6 +318,9 @@ public static long slowfib(long num){
     }
     public static ArrayList<Long> fibmem=new ArrayList<Long>();
     public static long ffib(long n){
+    	/*
+    	 * Fibonnaci implemented with DP
+    	 */
     	if(n<=1) {
     		return n;
     	}
@@ -335,6 +339,7 @@ public static void setupfib() {
         fibmem.add((long) 0);fibmem.add((long)1);fibmem.add((long)1);fibmem.add((long)2);
     }
     public static void show2Darr(int[][] a) {
+    	//Print out a 2D array for you
     	for(int[] b:a) {
     		for(int c:b) {
     			print(c+" ","");
@@ -344,6 +349,7 @@ public static void show2Darr(int[][] a) {
     	}
     }
     public static void showarr(int[] a) {
+    	//Print out a array for you
     	for(int x:a) {print(x+" ");}
     }
 	public static int[][] dpcache;
@@ -366,62 +372,29 @@ public static int ks(int W,int[] wt,int[] val,int n) {
 	public static void kssetup(int n,int W) {
 		dpcache=new int[n+1][W+1];
 	}
-	public static void main(String[] args) throws Exception{
+	public static int count(int[] arr) {
 		/*
-		 * Short demo of stuff
-		 * Making an error would also demo error reporting
-		 * 
+		 * Number of groups of 1s
+		 * Modify for other purposes if needed
+		 * Example
+		 * 1111000111
+		 * Returns 2
 		 * 
 		 */
-		System.out.println("Running demo");
-		Scanner sc=getsysscan();
-		print("Welcome to the demo");
-		print(">","");
-		int val;
-		/*
-		int[][] testarray= {
-				{1,1,2,7,7,1,1,1},
-				{1,1,4,0,7,1,2,2},
-				{0,3,6,9,1,0,0,0},
-				{0,3,0,1,0,0,0,0},
-				{0,3,0,0,0,0,0,0},
-				{1,1,5,1,3,1,1,1},
-				{1,1,1,1,3,1,1,1},
-		};
-		*/
-		int[][] testarray= {
-				{1,2,3,1},
-				{4,5,6,2},
-				{7,8,9,3},
-				{10,69,1,4}
-				
-		};
-		print("Roation of 90 degrees\n Before \n ");
-		show2Darr(testarray);
-		print("After \n");
-		show2Darr(rotate90cw(testarray));
-		print("BEFORE:");
-		int[][] ii= {
-				{1,1,2,3},
-				{1,0,2,1},
-				{1,1,1,1},
-				{1,2,3,4}
-		};
-		show2Darr(ii);
-		print("After H reflect:");
-		show2Darr(reverseh(ii));
-		
-		try {
-		  val=sc.nextInt();
-		}catch(Exception e) {
-			print("Oops that did not go well please rerun and choose a INTEGER");
-			val=-1;
-			report(e);
-			print("How about we test error reporting");
-			console();
-		}
-		if(1==val) {
-			
+		boolean b=false;int c=0;int temp;
+		for(int i=0;i<arr.length;i++) {
+			temp=arr[i];
+			if(temp==0 && b) {
+				b=false;
+				c++;
+			}
+			if(temp==1 && b==false) {
+				b=true;
+			}
 		}
+		return c;
+	}
+	public static void main(String[] args) throws Exception{
+		print("the demo has been removed do to lack of support. Instead we display info about the library.");
 	}
 }