#655437 (C++14) No.1501 酔歩

• 問題: No.1501 酔歩
• ユーザー: uzzy
• 提出日時: 2021-05-08 00:20:57
• 言語: C++14 (gcc 12.3.0 + boost 1.83.0)
• 結果: WA
• 実行時間: -
• コード長: 1,124 bytes
• コンパイル時間: 2,541 ms
• コンパイル使用メモリ: 183,960 KB
• 実行使用メモリ: 6,944 KB
• 最終ジャッジ日時: 2024-09-15 12:26:56
• 合計ジャッジ時間: 6,583 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	2 ms; 5,248 KB
testcase_01	WA	-
testcase_02	AC	2 ms; 5,376 KB
testcase_03	AC	2 ms; 5,376 KB
testcase_04	RE	-
testcase_05	AC	9 ms; 5,376 KB
testcase_06	AC	7 ms; 5,376 KB
testcase_07	AC	9 ms; 5,376 KB
testcase_08	AC	4 ms; 5,376 KB
testcase_09	AC	8 ms; 5,376 KB
testcase_10	AC	4 ms; 5,376 KB
testcase_11	AC	7 ms; 5,376 KB
testcase_12	AC	6 ms; 5,376 KB
testcase_13	RE	-
testcase_14	RE	-
testcase_15	RE	-
testcase_16	RE	-
testcase_17	RE	-
testcase_18	RE	-
testcase_19	RE	-
testcase_20	RE	-
testcase_21	RE	-
testcase_22	AC	11 ms; 5,376 KB
testcase_23	AC	11 ms; 5,376 KB
testcase_24	AC	11 ms; 5,376 KB
testcase_25	AC	11 ms; 5,376 KB
testcase_26	AC	12 ms; 5,376 KB
testcase_27	AC	11 ms; 5,376 KB
testcase_28	AC	11 ms; 5,376 KB
testcase_29	AC	13 ms; 5,376 KB
testcase_30	AC	10 ms; 5,376 KB
testcase_31	AC	12 ms; 5,376 KB
testcase_32	AC	12 ms; 5,376 KB
testcase_33	AC	11 ms; 5,376 KB
testcase_34	AC	11 ms; 5,376 KB
testcase_35	AC	11 ms; 5,376 KB
testcase_36	AC	11 ms; 5,376 KB
testcase_37	AC	12 ms; 5,376 KB
testcase_38	AC	12 ms; 5,376 KB
testcase_39	AC	10 ms; 5,376 KB
testcase_40	AC	12 ms; 5,376 KB
testcase_41	AC	11 ms; 5,376 KB
testcase_42	AC	13 ms; 5,376 KB
testcase_43	RE	-
testcase_44	RE	-
testcase_45	AC	12 ms; 5,376 KB
testcase_46	AC	10 ms; 5,376 KB
testcase_47	AC	12 ms; 5,376 KB
testcase_48	AC	13 ms; 5,376 KB
testcase_49	AC	12 ms; 5,376 KB
testcase_50	AC	12 ms; 5,376 KB
testcase_51	AC	13 ms; 5,376 KB
testcase_52	AC	12 ms; 5,376 KB
testcase_53	RE	-
testcase_54	AC	2 ms; 5,376 KB
testcase_55	WA	-

ソースコード

#pragma GCC optimize ("O2")
#pragma GCC target ("avx")
#include<bits/stdc++.h>
//#include<atcoder/all>
//using namespace atcoder;

using namespace std;
typedef long long ll;
#define rep(i, n) for(int i = 0; i < (n); i++)
#define rep1(i, n) for(int i = 1; i <= (n); i++)
#define co(x) cout << (x) << "\n"
#define cosp(x) cout << (x) << " "
#define ce(x) cerr << (x) << "\n"
#define cesp(x) cerr << (x) << " "
#define pb push_back
#define mp make_pair
#define chmin(x, y) x = min(x, y)
#define chmax(x, y) x = max(x, y)
#define Would
#define you
#define please

ll gcd(ll A, ll B) {
	if (B == 0) return A;
	return gcd(B, A % B);
}

int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);


	ll are = 1;
	rep1(i, 10) rep1(j, 10) {
		are = are / gcd(are, i * j) * i * j;
	}

	int N, K;
	cin >> N >> K;

	if (K == 0) {
		co(0);
		return 0;
	}

	int A[100000];
	rep(i, N) cin >> A[i];

	ll bunsi = 0;
	rep(i, K - 1) {
		bunsi += are / A[i] / A[i + 1];
	}
	ll bunbo = 0;
	rep(i, N - 1) {
		bunbo += are / A[i] / A[i + 1];
	}
	ll g = gcd(bunsi, bunbo);

	cout << bunsi / g << '/' << bunbo / g << endl;

	Would you please return 0;
}