結果
問題 | No.731 等差数列がだいすき |
ユーザー | kei |
提出日時 | 2018-09-07 21:44:47 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 65 ms / 1,500 ms |
コード長 | 2,328 bytes |
コンパイル時間 | 1,531 ms |
コンパイル使用メモリ | 170,384 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-05-07 00:49:38 |
合計ジャッジ時間 | 2,935 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 15 ms
5,376 KB |
testcase_04 | AC | 38 ms
5,376 KB |
testcase_05 | AC | 16 ms
5,376 KB |
testcase_06 | AC | 53 ms
5,376 KB |
testcase_07 | AC | 30 ms
5,376 KB |
testcase_08 | AC | 38 ms
5,376 KB |
testcase_09 | AC | 48 ms
5,376 KB |
testcase_10 | AC | 56 ms
5,376 KB |
testcase_11 | AC | 3 ms
5,376 KB |
testcase_12 | AC | 27 ms
5,376 KB |
testcase_13 | AC | 35 ms
5,376 KB |
testcase_14 | AC | 41 ms
5,376 KB |
testcase_15 | AC | 52 ms
5,376 KB |
testcase_16 | AC | 29 ms
5,376 KB |
testcase_17 | AC | 64 ms
5,376 KB |
testcase_18 | AC | 64 ms
5,376 KB |
testcase_19 | AC | 64 ms
5,376 KB |
testcase_20 | AC | 65 ms
5,376 KB |
ソースコード
#include "bits/stdc++.h" using namespace std; typedef long long ll; typedef pair<int, int> pii; typedef pair<ll, ll> pll; const int INF = 1e9; const ll LINF = 1e18; template<class S,class T> ostream& operator << (ostream& out,const pair<S,T>& o){ out << "(" << o.first << "," << o.second << ")"; return out; } template<class T> ostream& operator << (ostream& out,const vector<T> V){ for(int i = 0; i < V.size(); i++){ out << V[i]; if(i!=V.size()-1) out << " ";} return out; } template<class T> ostream& operator << (ostream& out,const vector<vector<T> > Mat){ for(int i = 0; i < Mat.size(); i++) { if(i != 0) out << endl; out << Mat[i];} return out; } template<class S,class T> ostream& operator << (ostream& out,const map<S,T> mp){ out << "{ "; for(auto it = mp.begin(); it != mp.end(); it++){ out << it->first << ":" << it->second; if(mp.size()-1 != distance(mp.begin(),it)) out << ", "; } out << " }"; return out; } /* <url:> 問題文============================================================ ================================================================= 解説============================================================= ================================================================ */ typedef long double ld; ll N; vector<ld> a; ld TC(ld b,ld d){ ld ret = 0; for(int i = 0; i < N;i++){ ret += (a[i]-b)*(a[i]-b); b += d; } return ret; } ld D = 0; ld C(ld b){ ld ret = 0; ld l = -INF, r = INF; for(int kassa = 0; kassa < 100;kassa++){ ld d1 = (r-l)/3 + l,d2 = (r-l)*2/3 + l; ld tc1 = TC(b,d1),tc2 = TC(b,d2); if(tc1 < tc2){ r = d2; }else{ l = d1; } } ret = TC(b,l); D = l; return ret; } void solve(){ cin >> N; a.resize(N); for(auto& in:a) cin >> in; ld l = -INF, r = INF; for(int kassa = 0; kassa < 100; kassa++){ ld b1 = (r-l)/3 + l,b2 = (r-l)*2/3 + l; ld c1 = C(b1), c2 = C(b2); if(c1 < c2){ r = b2; }else{ l = b1; } } ld B = l; C(l); ld cost = TC(B,D); cout << fixed << setprecision(12); cout << B << " " << D << endl; cout << cost << endl; } int main(void) { cin.tie(0); ios_base::sync_with_stdio(false); solve(); return 0; }