eroupean company's needs bonAppletit

/**
	 * bonAppletit
	 * 
	 * output
	 * overcharge
	 * number items:
	 * investigation volummn - Anna bill cost
	 * print "Anna was overcharged"
	 * 
	 * or not overcharge
	 * output: bonAppletit
	 * 
	 * eroupean company's  needs
	 * constriants:
	 * bill numSize: 2<=n<=10to5
	 * keyIndex: that Anna did not eat : 0<=k<n
	 * bill index of that order items cost: 0<=bill[i]<=10to4
	 * the amount of money that Bon chareged: 0<=b<=sum(bill[0],bill[n-1]) bill[i] is in this encloure
	 *
	 * @param bill
	 * @param k
	 * @param b
	 */
	public static void bonAppletit(List<Integer> bill,int k,int b) {
		if(bill==null) {
			return ;
		}
		if(bill.isEmpty()) {
			return ;
		}
		int intVal=1;
		for (int i = 0; i < 5; i++) {
			intVal*=10;
		}
		if(bill.size()<2 || bill.size()>intVal) {
			return ;
		}
		if(k<0 || k>=bill.size()) {
			return ;
		}
		int intVal1=1;
		for (int i = 0; i < 4; i++) {
			intVal1*=10;
		}
		for(Integer intTempItem : bill) {
			if(intTempItem<0 || intTempItem>intVal1) {
				return ;
			}
		}
		int sumE=0;
		for(Integer elementBillItem : bill) {
			sumE+=elementBillItem;
		}
		if(b<0 || b>sumE) {
			return ;
		}
		int itemBillSumEvitIndexItem=0;
		Integer integer = bill.get(k);
		for(Integer itemBill : bill) {
			if(itemBill==integer) {
				continue;
			}
			itemBillSumEvitIndexItem+=itemBill;
		}
		int averageCharge = itemBillSumEvitIndexItem/2;
		if(b>averageCharge) {
			System.out.println("Anna was overcharged");
		}else if(b==averageCharge){
			System.out.println("bonAppletit");
		}
		return ;
	}