public class Main {

public static void main(String[] args) {
	boolean[] A = new boolean[300];
	for(int i = 0;i < 21;i++) {
		A[i*5] = true;
	}
	boolean[] B = new boolean[300];
	for(int i = 0;i < 21;i++) {
		B[i*6] = true;
	}
	boolean[] C = new boolean[300];
	for(int i = 0;i < 21;i++) {
		C[i*7] = true;
	}
	
	int count = 0;
	for(int i = 0;i < 300;i++) {
		if(A[i] || B[i] || C[i]) {
			count++;
		}
	}
	System.out.println(count);
}

}