package reddit;
import java.math.BigDecimal;
import java.util.Scanner;
public class RedditChallengeIntermediate118 {
public static void main(String[] args) {
RedditChallengeIntermediate118 rc118 = new RedditChallengeIntermediate118();
Scanner scan = new Scanner(System.in);
String input = scan.nextLine();
//String input = "5.00 2.00 2.00 1.00";
//rc118.calculate(input.split(" "));
//input = "99.99 1.23 3.21 5.01";
rc118.calculate(input.split(" "));
}
public void calculate(String[] inputs) {
int simLength = new BigDecimal(inputs[0]).multiply(new BigDecimal(100)).setScale(0).intValueExact();
int shellRetrieval = new BigDecimal(inputs[1]).multiply(new BigDecimal(100)).setScale(0).intValueExact();
int propellantRetrieval = new BigDecimal(inputs[2]).multiply(new BigDecimal(100)).setScale(0).intValueExact();
int firingTime = new BigDecimal(inputs[3]).multiply(new BigDecimal(100)).setScale(0).intValueExact();
int shotsFired = 0;
boolean cannonLoaded = false;
boolean cannonFired = false;
boolean cannonReady = true;
int cannonTimer = 0;
boolean shellLoaded = false;
int shellTimer = 0;
boolean propellantLoaded = false;
int propellantTimer = 0;
//System.out.println("Length of simulation: " + simLength);
//System.out.println("Length of shell retrieval: " + shellRetrieval);
//System.out.println("Length of propellant retrieval: " + propellantRetrieval);
//System.out.println("Length of firingTime: " + firingTime);
for (int timer = 1; timer <= simLength; timer++) {
if (cannonFired) cannonTimer++;
if (!shellLoaded) shellTimer++;
if (!propellantLoaded) propellantTimer++;
if (shellTimer == shellRetrieval) shellLoaded = true;
if (propellantTimer == propellantRetrieval) propellantLoaded = true;
if (!cannonReady) {
if (cannonTimer == firingTime) {
cannonReady = true;
cannonTimer = 0;
cannonFired = false;
}
}
if (cannonReady) {
if (shellLoaded && propellantLoaded) cannonLoaded = true;
if (cannonLoaded) {
shotsFired++;
cannonFired = true;
cannonLoaded = false;
cannonReady = false;
shellLoaded = false;
shellTimer = 0;
propellantLoaded = false;
propellantTimer = 0;
}
}
}
System.out.println("Number of shots fired: " + shotsFired);
}
}