import java.io.IOException;
public class Main{
	public static void main(String args[]) throws IOException{
		byte a[] = new byte[3];
		System.in.read(a);
		a[0] &= 1;
		a[1] &= 1;
		a[2] &= 1;
		System.out.println(a[0]+a[1]+a[2]);
	}
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz