結果
問題 | No.1385 Simple Geometry 2 |
ユーザー |
![]() |
提出日時 | 2021-02-07 15:32:22 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
TLE
(最新)
AC
(最初)
|
実行時間 | - |
コード長 | 2,802 bytes |
コンパイル時間 | 906 ms |
コンパイル使用メモリ | 108,096 KB |
実行使用メモリ | 19,552 KB |
最終ジャッジ日時 | 2024-07-04 13:03:50 |
合計ジャッジ時間 | 33,781 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 18 TLE * 47 |
ソースコード
#include <iostream>#include <iomanip>#include <algorithm>#include <assert.h>#include <complex>#include <utility>#include <vector>#include <string>#include <stack>#include <queue>#include <tuple>#include <cmath>#include <bitset>#include <cctype>#include <set>#include <map>#include <unordered_map>#include <numeric>#include <functional>#include <chrono>#define _overload3(_1,_2,_3,name,...) name#define _rep(i,n) repi(i,0,n)#define repi(i,a,b) for(ll i=a;i<b;++i)#define rep(...) _overload3(__VA_ARGS__,repi,_rep,)(__VA_ARGS__)#define _rrep(i,a) rrepi(i,a,0)#define rrepi(i,a,b) for(ll i=a-1;i>=b;--i)#define rrep(...) _overload3(__VA_ARGS__,rrepi,_rrep,)(__VA_ARGS__)#define all(x) (x).begin(),(x).end()#define PRINT(V) cout << V << "\n"#define SORT(V) sort((V).begin(),(V).end())#define RSORT(V) sort((V).rbegin(), (V).rend())using namespace std;using ll = long long;template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }inline void Yes(bool condition){ if(condition) PRINT("Yes"); else PRINT("No"); }template<class itr> void cins(itr first,itr last){for (auto i = first;i != last;i++){cin >> (*i);}}template<class itr> void array_output(itr start,itr goal){string ans = "",k = " ";for (auto i = start;i != goal;i++) ans += to_string(*i)+k;if (!ans.empty()) ans.pop_back();PRINT(ans);}ll gcd(ll a, ll b) {return a ? gcd(b%a,a) : b;}const ll INF = 1e18;const ll MOD = 1000000007;const ll MOD2 = 998244353;const ll MOD3 = 1e6;const ll EPS = 1e-10;int sgn(const double a){return (a < -EPS ? -1 : (a > EPS ? +1 : 0));}typedef pair<int,int> pi;typedef pair<ll,ll> P;typedef tuple<ll,ll,ll> tri;typedef pair<double,double> point;typedef complex<double> Point;typedef string::const_iterator State;const ll MAX = 105;constexpr ll nx[4] = {-1,0,1,0};constexpr ll ny[4] = {0,1,0,-1};const double PI = 3.1415926535;int main(){ll n,l;cin >> n >> l;vector<long double> coss(n),sins(n);rep(i,n){long double t;cin >> t;coss[i] = cos(2*PI*t/(long double)l);sins[i] = sin(2*PI*t/(long double)l);}long double sumsin = 0.0,sumcos = 0.0;rep(i,n){sumsin += sins[i];sumcos += coss[i];}long double ans = 0.0,nowsin = 0.0,nowcos = 0.0;rep(i,n-1){nowsin += (n-i-2)*sins[i+1];nowcos += (n-i-2)*coss[i+1];}rep(i,n){ans += nowsin*coss[i]-nowcos*sins[i];nowsin = nowsin+sumsin-(n-1)*sins[(i+1)%n]-sins[i];nowcos = nowcos+sumcos-(n-1)*coss[(i+1)%n]-coss[i];}ll k = n*(n-1)*(n-2)/6;printf("%.12Lf\n",ans/(long double)k/2.0);}