import java.util.*;
public class Main {
public static void main(String[] args) {
int count = 0;
Scanner scanner = new Scanner(System.in);
//write your code here......
//注意数据类型应保持一致,先用nextInt方法筛出整型数据,再判断是否为正数
while(scanner.nextInt()>0){
count++;
}
System.out.println(count);
}
}

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