题解 | #输入n个整数，输出其中最小的k个#
截取字符串
http://www.nowcoder.com/practice/a30bbc1a0aca4c27b86dd88868de4a4a
public class Main {
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
while (sc.hasNext()) {
String s=sc.next();
int a=sc.nextInt();
char[] chars = s.toCharArray();
for (int i = 0; i < a; i++) {
System.out.print(chars[i]);
}
System.out.println();
}
}
}
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