import java.util.Scanner;
public class Main {
public static void main(String[] args){
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
int len=sc.nextInt();
if(n>30||len>10){
return;
}
int sum=1;
for(int i=1;i<=n;i++){
sum=sum*i;
}
String s=String.valueOf(sum);
if(s.length()<len){
int cha=len-s.length();
for(int i=0;i<cha;i++){
System.out.print("0");
}
System.out.print(s);
}else{
System.out.println(s.substring(s.length()-len, s.length()));
}
}
}
阶乘末尾
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转载自blog.csdn.net/wz1997/article/details/79632735
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