#247895 (C++11) No.67 よくある棒を切る問題 (1)

• 問題: No.67 よくある棒を切る問題 (1)
• ユーザー: tancahn2380
• 提出日時: 2018-03-28 20:46:03
• 言語: C++11 (gcc 11.4.0)
• 結果: AC
• 実行時間: 242 ms / 5,000 ms
• コード長: 1,826 bytes
• コンパイル時間: 1,257 ms
• コンパイル使用メモリ: 104,548 KB
• 実行使用メモリ: 5,376 KB
• 最終ジャッジ日時: 2024-11-08 12:38:01
• 合計ジャッジ時間: 7,454 ms
• ジャッジサーバーID （参考情報）: judge5 / judge4

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	242 ms; 5,248 KB
testcase_01	AC	2 ms; 5,248 KB
testcase_02	AC	91 ms; 5,248 KB
testcase_03	AC	170 ms; 5,248 KB
testcase_04	AC	214 ms; 5,248 KB
testcase_05	AC	213 ms; 5,248 KB
testcase_06	AC	213 ms; 5,376 KB
testcase_07	AC	235 ms; 5,248 KB
testcase_08	AC	235 ms; 5,248 KB
testcase_09	AC	236 ms; 5,248 KB
testcase_10	AC	192 ms; 5,248 KB
testcase_11	AC	203 ms; 5,248 KB
testcase_12	AC	185 ms; 5,248 KB
testcase_13	AC	216 ms; 5,248 KB
testcase_14	AC	225 ms; 5,248 KB
testcase_15	AC	200 ms; 5,248 KB
testcase_16	AC	215 ms; 5,248 KB
testcase_17	AC	214 ms; 5,248 KB
testcase_18	AC	215 ms; 5,248 KB
testcase_19	AC	236 ms; 5,248 KB
testcase_20	AC	236 ms; 5,248 KB
testcase_21	AC	238 ms; 5,376 KB
testcase_22	AC	193 ms; 5,248 KB
testcase_23	AC	203 ms; 5,248 KB
testcase_24	AC	2 ms; 5,248 KB
testcase_25	AC	7 ms; 5,248 KB
testcase_26	AC	4 ms; 5,248 KB
testcase_27	AC	3 ms; 5,248 KB
testcase_28	AC	40 ms; 5,248 KB
testcase_29	AC	22 ms; 5,248 KB
testcase_30	AC	7 ms; 5,248 KB

コンパイルメッセージ

main.cpp: In function ‘int main()’:
main.cpp:73:15: warning: ignoring return value of ‘int system(const char*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   73 |         system("pause");
      |         ~~~~~~^~~~~~~~~

ソースコード

# include <iostream>
# include <algorithm>
# include <vector>
# include <string>
# include <set>
# include <map>
# include <cmath>
# include <iomanip>
# include <functional>
# include <utility>
# include <stack>
# include <queue>
# include <list>
# include <tuple>
# include <unordered_map>
# include <numeric>
# include <complex>
# include <bitset>
# include <random>
# include <chrono>
using namespace std;
using LL = long long;
using ULL = unsigned long long;
constexpr int INF = 2147483647;
constexpr int HINF = INF / 2;
constexpr double DINF = 100000000000000000.0;
constexpr double HDINF = 50000000000000000.0;
constexpr long long LINF = 9223372036854775807;
constexpr long long HLINF = 4500000000000000000;
const double PI = acos(-1);
int dx[4] = { 0,1,0,-1 }, dy[4] = { 1,0,-1,0 };
template <typename T_char>T_char TL(T_char cX) { return tolower(cX); };
template <typename T_char>T_char TU(T_char cX) { return toupper(cX); };
# define ALL(x)      (x).begin(),(x).end()
# define UNIQ(c)     (c).erase(unique(ALL((c))),(c).end())
# define LOWER(s)    transform(ALL((s)),(s).begin(),TL<char>)
# define UPPER(s)    transform(ALL((s)),(s).begin(),TU<char>)
# define mp          make_pair
# define eb          emplace_back
# define FOR(i,a,b)  for(LL i=(a);i<(b);i++)
# define RFOR(i,a,b) for(LL i=(a);i>=(b);i--)
# define REP(i,n)    FOR(i,0,n)
# define INIT        std::ios::sync_with_stdio(false);std::cin.tie(0)

int n;
double l[202020];
LL k;

bool calc(double mid) {
	LL cnt = 0;
	REP(i, n) {
		cnt += l[i] / mid;
	}
	return k <= cnt;
}


int main() {
	cin >> n;
	REP(i, n)cin >> l[i];
	cin >> k;
	double left = 0, right = HDINF;
	REP(num, 100) {
		double mid = (left + right) / 2;
		if (calc(mid)) {
			left = mid;
		}
		else {
			right = mid;
		}
	}
	cout <<fixed<<setprecision(12)<<left << endl;
	system("pause");
}