import java.util.*;

public class Main {
	public static void main( String[] args ) {
		
		Scanner sc = new Scanner( System.in );
		
		int A = sc.nextInt();
		int B = sc.nextInt();
		int C = sc.nextInt();
		int X = sc.nextInt();
		int cnt = 0;
		
		for (int a = 0; a < A + 1; a++ ) {
			
			for ( int b = 0; b < B + 1; b++ ) {
				
				for ( int c = 0; c < C + 1; c++ ) {
					
					if (500 * a + 100 * b + 50 * c == X ) {
						cnt += 1;
					}
				}
			}
		}
		System.out.println(cnt);
	}
}
/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