Submission #1857306


Source Code Expand

#include<bits/stdc++.h>
using namespace std;

#define rep(i,n) for(i=0;i<(n);i++)
#define For(i,a,b) for(i=(a);i<(b);i++)
#define all(x) (x).begin(),(x).end()
typedef long long ll;
const double PI=acos(-1.0);

int main(){
	int i,j=0,k=1;
	int n;
	vector<int> r;
	double ans=0;
	cin >> n;
	r.resize(n);
	rep(i,n) cin >> r[i];

	sort(all(r));

	for(i=n-1;i>=0;i--){
		j+=r[i]*r[i]*k;
		k*=-1;
	}
	ans= j*PI;
	cout << setprecision(20) << ans << endl;

	return 0;
}

Submission Info

Submission Time
Task B - N重丸
User kimitsu_emt
Language C++14 (GCC 5.4.1)
Score 100
Code Size 489 Byte
Status AC
Exec Time 5 ms
Memory 768 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 100 / 100
Status
AC × 2
AC × 21
Set Name Test Cases
Sample example_0.txt, example_1.txt
All example_0.txt, example_1.txt, maxrand_0.txt, maxrand_1.txt, maxrand_2.txt, random_0.txt, random_1.txt, random_2.txt, random_3.txt, random_4.txt, random_5.txt, random_6.txt, random_7.txt, random_8.txt, random_9.txt, special_0.txt, special_1.txt, special_2.txt, special_3.txt, example_0.txt, example_1.txt
Case Name Status Exec Time Memory
example_0.txt AC 5 ms 768 KB
example_1.txt AC 1 ms 256 KB
maxrand_0.txt AC 1 ms 256 KB
maxrand_1.txt AC 1 ms 256 KB
maxrand_2.txt AC 1 ms 256 KB
random_0.txt AC 1 ms 256 KB
random_1.txt AC 1 ms 256 KB
random_2.txt AC 1 ms 256 KB
random_3.txt AC 1 ms 256 KB
random_4.txt AC 1 ms 256 KB
random_5.txt AC 1 ms 256 KB
random_6.txt AC 1 ms 256 KB
random_7.txt AC 1 ms 256 KB
random_8.txt AC 1 ms 256 KB
random_9.txt AC 1 ms 256 KB
special_0.txt AC 1 ms 256 KB
special_1.txt AC 1 ms 256 KB
special_2.txt AC 1 ms 256 KB
special_3.txt AC 1 ms 256 KB