import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader buff = null;
		buff = new BufferedReader(new InputStreamReader(System.in));

		int A = Integer.parseInt(buff.readLine());
		int B = Integer.parseInt(buff.readLine());
		int C = Integer.parseInt(buff.readLine());
		int X = Integer.parseInt(buff.readLine());
		int count = 0;
		for(int i = 0; i <= A; ++i){
			for(int j = 0; j <= B; ++j){
				for(int k = 0; k <= C; ++k){
					int tmp = 500 * i + 100 * j + 50 * k;
					if(tmp == X){
						count++;
					}
				}
			}
		}

		System.out.println(count);
	}

	static long f() {
		long ans = 0;


		return ans;
	}
}
/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