Submission #998016

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
double f(int p, int n)
{
	double P = p/100.0;
	double Q = 1.0 - P;
	double ans = (-n)/(2*(Q-1));
	return ans;
}
int main()
{
	int x,p;
	cin>>x>>p;
	cout.precision(10);
	double ans;
	if(x%2)
		ans = 1.0 + (p/100.0)*f(p,x-1) + ((100 - p)/100.0)*f(p,x+1);
	else
		ans = f(p,x);
	cout<<fixed<<ans<<"\n";
	return 0;
}

Submission Info

Judge Result