FZU 1560 Binary Bit Benchmark

Binary Bit Benchmark
Time Limit:1s
Memory limit:32M
Accepted Submit:95
Total Submit:197
Amtel has announced that it will release a 128-bit computer chip by 2010, a 256-bit computer by 2020, and so on, continuing its strategy of doubling the word-size every ten years. (Amtel released a 64-bit computer in 2000, a 32-bit computer in 1990, a 16-bit computer in 1980, an 8-bit computer in 1970, and a 4-bit computer, its first, in 1960.) Amtel will use a new benchmark - the Factstone - to advertise the vastly improved capacity of its new chips. The Factstone rating is defined to be the largest integer n such that n! can be represented as an unsigned integer in a computer word (binary number). Given a year 1960 <= y <= 2160, what will be the Factstone rating of Amtel's most recently released chip?

Input

There are several test cases. For each test case, there is one line of input containing y. A line containing 0 follows the last test case.

Output

For each test case, output a line giving the Factstone rating.

Sample Input

1960
1981
0

Sample Output

3
8

Original: FOJ 월경기 - 2007년 12월
 
문제 풀기:
제목을 알아야 한다.제목은 n을 풀어야 합니다!<2^bit, 그중 n의 최대치.코드의 대수보다 대수를 운용해야 한다.
#include #include using namespace std; int main() { long year,n; long double a,b; a=0;b=1;n=0;a=n; while (cin>>year && year!=0) { year=year/10-196+2; b=pow((double)2,(double)year); while(a