题解 | #统计每个月兔子的总数#
统计每个月兔子的总数
https://www.nowcoder.com/practice/1221ec77125d4370833fd3ad5ba72395
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.util.Scanner;
public class Main {
public static void main(String[] args) throws IOException {
Scanner sc = new Scanner(System.in);
int months = sc.nextInt();
if(months < 3){
System.out.println(1);
} else{
int temp = 0;
// 记录本月新生兔
int newBirth = 1;
// 记录年满一月兔
int oneMonth = 0;
// 记录成年兔
int audltMonth = 0;
for(int i = 1; i < months; i++){
// 缓存本月新生兔
temp = oneMonth + audltMonth;
// 本月成年兔
audltMonth= audltMonth + oneMonth;
// 本月年满一月兔
oneMonth = newBirth;
// 本月新生兔
newBirth = temp;
}
System.out.println(newBirth + oneMonth + audltMonth);
}
}
}
