public static void main(String[] args) {
		//int[] array = {1,2,3,4,5};
		//System.out.print(collapse(array));
		
	}
	@SuppressWarnings("unused")
	public static int[] collapse(int[] array) {
		
		int L=array.length; 
		int outSize;
		
		if(L%2==0)
			outSize = L/2;
		else
			outSize = L/2+1;
		
		int[] array2 = new int[outSize]; //{2 3 4 5 6 7} ->{5 9 13}
			//{2 3 4 5 6} -> {5 9 6}
		int i2=0;
		
		for(int i=0;i<L-1;i=i+2) 
		{
			array2[i/2] = array[i] + array[i+1];
			//i2++; }
			if(L%2==1) {
			array2[outSize-1] = array[L-1]; }
			return array2;
		}
		return array2;
	}
}