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Vacations.java
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52 lines (42 loc) · 1016 Bytes
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import java.util.HashMap;
import java.util.Scanner;
public class Vacations
{
public static void main( String[] args )
{
Scanner s = new Scanner( System.in );
int n = s.nextInt();
int pre = s.nextInt();
int count=0;
if(pre==0)
count++;
for(int i=0;i<n-1;i++)
{
int current = s.nextInt();
if(pre==1 && current==1)
{
current=0;
count++;
}
else if(pre==2 && current==2)
{
current=0;
count++;
}
else if(pre==1 && current==3)
{
current=2;
}
else if(pre==2 && current==3)
{
current=1;
}
else if(current==0)
{
count++;
}
pre = current;
}
System.out.println( count );
}
}