import java.util.*; 
class Main 
{
public static void main(String []args) 
{
Scanner sc = new Scanner(System.in); 
int x1 = sc.nextInt(); 
int x2 = sc.nextInt(); 
int x3 = sc.nextInt(); 
int x4 = sc.nextInt(); 
int x5 = sc.nextInt();   
  
if(x1==0)  
{
System.out.println("1");
} 
else if(x2==0)  
{
System.out.println("2");
} 
else if(x3==0)  
{
System.out.println("3");
} 
else if(x4==0)  
{
System.out.println("4");
} 
else  
{
System.out.println("5");
}  
} 
} import java.util.*; util.* java class Main 
{
public static void main(String []args) 
{
Scanner sc = new Scanner(System.in); 
int x1 = sc.nextInt(); 
int x2 = sc.nextInt(); 
int x3 = sc.nextInt(); 
int x4 = sc.nextInt(); 
int x5 = sc.nextInt();   
  
if(x1==0)  
{
System.out.println("1");
} 
else if(x2==0)  
{
System.out.println("2");
} 
else if(x3==0)  
{
System.out.println("3");
} 
else if(x4==0)  
{
System.out.println("4");
} 
else  
{
System.out.println("5");
}  
} 
} Main public static void main(String []args) 
{
Scanner sc = new Scanner(System.in); 
int x1 = sc.nextInt(); 
int x2 = sc.nextInt(); 
int x3 = sc.nextInt(); 
int x4 = sc.nextInt(); 
int x5 = sc.nextInt();   
  
if(x1==0)  
{
System.out.println("1");
} 
else if(x2==0)  
{
System.out.println("2");
} 
else if(x3==0)  
{
System.out.println("3");
} 
else if(x4==0)  
{
System.out.println("4");
} 
else  
{
System.out.println("5");
}  
} main {
Scanner sc = new Scanner(System.in); 
int x1 = sc.nextInt(); 
int x2 = sc.nextInt(); 
int x3 = sc.nextInt(); 
int x4 = sc.nextInt(); 
int x5 = sc.nextInt();   
  
if(x1==0)  
{
System.out.println("1");
} 
else if(x2==0)  
{
System.out.println("2");
} 
else if(x3==0)  
{
System.out.println("3");
} 
else if(x4==0)  
{
System.out.println("4");
} 
else  
{
System.out.println("5");
}  
} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int x1 = sc.nextInt(); x1 sc.nextInt() sc.nextInt sc int x2 = sc.nextInt(); x2 sc.nextInt() sc.nextInt sc int x3 = sc.nextInt(); x3 sc.nextInt() sc.nextInt sc int x4 = sc.nextInt(); x4 sc.nextInt() sc.nextInt sc int x5 = sc.nextInt(); x5 sc.nextInt() sc.nextInt sc if(x1==0)  
{
System.out.println("1");
} 
else if(x2==0)  
{
System.out.println("2");
} 
else if(x3==0)  
{
System.out.println("3");
} 
else if(x4==0)  
{
System.out.println("4");
} 
else  
{
System.out.println("5");
} x1==0 x1 0 {
System.out.println("1");
} System.out.println("1") System.out.println System.out System System.out "1" if(x2==0)  
{
System.out.println("2");
} 
else if(x3==0)  
{
System.out.println("3");
} 
else if(x4==0)  
{
System.out.println("4");
} 
else  
{
System.out.println("5");
} x2==0 x2 0 {
System.out.println("2");
} System.out.println("2") System.out.println System.out System System.out "2" if(x3==0)  
{
System.out.println("3");
} 
else if(x4==0)  
{
System.out.println("4");
} 
else  
{
System.out.println("5");
} x3==0 x3 0 {
System.out.println("3");
} System.out.println("3") System.out.println System.out System System.out "3" if(x4==0)  
{
System.out.println("4");
} 
else  
{
System.out.println("5");
} x4==0 x4 0 {
System.out.println("4");
} System.out.println("4") System.out.println System.out System System.out "4" {
System.out.println("5");
} System.out.println("5") System.out.println System.out System System.out "5" String []args args
import java.util.*; 
class Main 
{
public static void main(String []args) 
{
Scanner sc = new Scanner(System.in); 
int x1 = sc.nextInt(); 
int x2 = sc.nextInt(); 
int x3 = sc.nextInt(); 
int x4 = sc.nextInt(); 
int x5 = sc.nextInt();   
  
if(x1==0)  
{
System.out.println("1");
} 
else if(x2==0)  
{
System.out.println("2");
} 
else if(x3==0)  
{
System.out.println("3");
} 
else if(x4==0)  
{
System.out.println("4");
} 
else  
{
System.out.println("5");
}  
} 
}