Submission #15831

#	Time	Username	Problem	Language	Result	Execution time	Memory
15831		comet	맛있는 과자 (kriii3_A)	C++98	0 / 33	0 ms	1820 KiB

A

#include<iostream>
#include<vector>
#include<algorithm>
#include<cmath>
using namespace std;
typedef long long ll;
void f(double a,double b,double c,ll N,ll K){
	if(N<0){
		cout<<a+b-log(2);
		return;
	}
	if(a>b)swap(a,b);
	if(K>(1ll<<N)){
		f(a+b-c,2*b-c,b,N-1,K-(1ll<<N));
	}
	else{
		f(2*a-c,a+b-c,a,N-1,K);
	}
}
int main(){
	ios::sync_with_stdio(0);
	cout<<fixed;
	cout.precision(15);
	ll N,K;
	double a,b,c;
	cin>>a>>b>>N>>K;
	K=(1ll<<N)-K+1;
	c=sqrt(a*a+b*b);
	f(log(a),log(b),log(c),N-1,K);
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 23