标签:style http io color ar os sp java for
UVA10334 - Ray Through Glasses(Fibonacci数列)
题目大意:求光穿过两块玻璃的折射次数的方式数目,我也有点不懂它说什么,但是看图看明白了。
解题思路:画画折射3,4,5,发现话的规律,然后就会发现符合Fibonacci数列,f[n] = f[n - 1] + f[n - 2];但是n很大到1000,需要用大数。
代码:
import java.util.*;
import java.math.*;
import java.io.*;
public class Main {
static BigInteger f[] = new BigInteger[1005];
public static void init() {
f[0] = BigInteger.valueOf(1);
f[1] = BigInteger.valueOf(2);
for (int i = 2; i <= 1000; i++)
f[i] = f[i - 1].add(f[i - 2]);
}
public static void main(String args[]) {
Scanner cin = new Scanner(System.in);
int n;
init();
while (cin.hasNext()) {
n = cin.nextInt();
System.out.println(f[n]);
}
}
}
UVA10334 - Ray Through Glasses(Fibonacci数列)
标签:style http io color ar os sp java for
原文地址:http://blog.csdn.net/u012997373/article/details/41149331