program P
	final int size = 10;
	class Table {
		int[] pos;
		int[] neg;
	}
	Table val;
{
	void main()
		int x, i;
	{ //---------- Initialize val
		val = new Table;
		val.pos = new int[size]; val.neg = new int[size];
		i = 0;
		while (i < size) {
			val.pos[i] = 0; val.neg[i] = 0;
			i = i + 1;
		}
	//---------- Read values
		read(x);
		while (x != 0) {
			if (x >= 0) {
				val.pos[x] = val.pos[x] + 1;
			} else if (x < 0) {
				val.neg[-x] = val.neg[-x] + 1;
			}
			read(x);
		}
	}
}