結果
問題 | No.1385 Simple Geometry 2 |
ユーザー | maple116 |
提出日時 | 2021-02-07 21:38:46 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,263 bytes |
コンパイル時間 | 2,242 ms |
コンパイル使用メモリ | 200,104 KB |
実行使用メモリ | 35,200 KB |
最終ジャッジ日時 | 2024-07-04 14:58:33 |
合計ジャッジ時間 | 8,290 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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テストケース
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ソースコード
#include <bits/stdc++.h> //#include <boost/multiprecision/cpp_int.hpp> using namespace std; //g++ hoge.cpp (-std=c++17) -I . で実行 typedef long long ll; typedef pair<ll,ll> prl; typedef vector<ll> vcl; typedef map<ll,ll> mapl; typedef unordered_map<ll,ll> umap; #define pb push_back #define all(v) v.begin(), v.end() #define rep(i,a,b) for(ll i=a;i<=b;i++) #define repi(i,a,b) for(int i=a;i<=b;i++) #define repr(i,a,b) for(ll i=a;i>=b;i--) #define reps(i,v) for(ll i=0;i<v.size();i++) #define rept(itr,v) for(auto itr=v.begin();itr!=v.end();itr++) #define rept1(itr,v) for(auto itr=v.begin()+1;itr!=v.end();itr++) #define rept2(itr,v) for(auto itr=v.begin();itr!=v.end()-1;itr++) #define print(x) cout << (x) << endl; #define fprint(x) printf("%.15lf\n",(x)); #define print2(x,y) cout << (x) << " " << (y) << endl; #define YesNo(test) cout << ((test) ? "Yes" : "No") << endl #define debug cout << "debug_print" << endl #define Bint boost::multiprecision::cpp_int template<typename T> void chmin(T &a, const T &b) { a = min(a, b); } template<typename T> void chmax(T &a, const T &b) { a = max(a, b); } ll myceil(ll a, ll b) { return (a+b-1) / b; } //const ll mod = 1e9+7; //const ll mod = 998244353; //typedef modint1000000007 mint; //typedef modint998244353 mint; //typedef modint mint //cout << sum.val() << endl; //mint::set_mod(mod); modが固定でないとき ll n; const ll max_n = 500005; double m,l,t[max_n],a[max_n],s[max_n],c[max_n]; double ss[max_n],sc[max_n],ss2[max_n],sc2[max_n]; int main() { // your code goes here cin >> n >> l; double pi = atan2(0.0, -1.0); rep(i,1,n){ //cin >> t[i]; t[i] = i-1; a[i] = 2.0*pi*t[i]/l; s[i] = sin(a[i]); ss[i] = ss[i-1] + s[i]; c[i] = cos(a[i]); sc[i] = sc[i-1] + c[i]; } m = n; sc2[1] = (2.0-m) * c[1]; double ar1 = sc2[1] * s[2]; rep(i,3,n){ sc2[i-1] = sc2[i-2] + 2.0 * sc[i-2] + (2.0-m) * c[i-1]; ar1 += sc2[i-1] * s[i]; } ss2[1] = (2.0-m) * s[1]; double ar2 = ss2[1] * c[2]; rep(i,3,n){ ss2[i-1] = ss2[i-2] + 2.0 * ss[i-2] + (2.0-m) * s[i-1]; ar2 += ss2[i-1] * c[i]; } ll ss = n * (n-1) * (n-2) / 6; fprint((ar2-ar1)/((double)ss*2.0)); return 0; }