题解 | #杨辉三角的变形#
杨辉三角的变形
https://www.nowcoder.com/practice/8ef655edf42d4e08b44be4d777edbf43
找规律即可，除了第一第二行，从第三行开始每4行一个轮回
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Main {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String line = reader.readLine();
int num = Integer.parseInt(line);
if(num == 1 || num == 2){
System.out.print(-1);
} else {
int[] result = {3, 2, 4, 2};
System.out.print(result[num % 4]);
}
}
}
