fib.cs

using System;

public class fib{
    private static int calcFib(int x){
	if(x < 2){
	    return x;
	}else{
	    int qianVal = 0;
	    int zuoVal = 1;
	    int res = 0;
	    for(int i = 1; i < x; i++){
		res = qianVal+zuoVal;
	        qianVal = zuoVal;
		zuoVal = res;
	    }
	    return res;
	}
    }
    private static int doWork(int rem){
	int acc = 0;
	for(int i = 0; i < rem; i++){
	    acc += calcFib((acc+1)%50);
	}
	return acc;
    }
    public static void Main(string[] args){
    	long start= DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond;
	System.Console.WriteLine(doWork(Convert.ToInt32(args[0])));
	long duration = DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond - start;
	System.Console.WriteLine("LANGUAGE  C#  "+ duration);
    }
}