Submission #169865


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#include <iostream>
#include <vector>
#include <algorithm>
#include <numeric>
#include <set>
#include <map>
#include <string>
#include <stack>
#include <queue>
#include <cmath>
#include <cstdio>
#include <istream>
#include <sstream>
#include <iomanip>
#include <iterator>
#include <climits>
using namespace std;

typedef ostringstream OSS;
typedef istringstream ISS;

typedef vector<int> VI;
typedef vector< VI > VVI;

typedef long long LL;

typedef pair<int, int> PII;
typedef vector<PII> VPII;

#define X first
#define Y second

unsigned long xor128(unsigned long n){ 
    static unsigned long x=time(NULL),y=362436069,z=521288629,w=88675123; 
    unsigned long t; 
    t=(x^(x<<11));
	x=y;
	y=z;
	z=w;
	return w=((w^(w>>19))^(t^(t>>8)))%n;
}

int count_opens(VI &perm, VI &coins) {
	int opens = 0;
	int N = perm.size();

	for (int i = 0; i < N; i++) {
		bool rev = true;
		for (int j = 0; j < i; j++) {
			rev = !(coins[perm[i]] % coins[perm[j]]) ^ rev;
		}
		opens += rev;
	}

	return opens;
}

int main(void) {
	int N;
	cin >> N;
	VI coins(N);
	for(auto &coin : coins) {
		cin >> coin;
	}

	VI perm(N);
	iota(perm.begin(), perm.end(), 0);

	int opens = 0;
	int loop;

	if (N <= 8) {
		loop = 0;
		do {
			opens += count_opens(perm, coins);
			loop++;
		} while(next_permutation(perm.begin(), perm.end()));
	}else {
		loop = 1e+5;
		for (int l = 0; l < loop; l++) {
			random_shuffle(perm.begin(), perm.end(), xor128);
			opens += count_opens(perm, coins);
		}
	}

	cout << ((double)opens / (double)loop) << endl;

	return 0;
}

Submission Info

Submission Time
Task C - コイン
User snakazawa
Language C++11 (GCC 4.8.1)
Score 99
Code Size 1621 Byte
Status WA
Exec Time 2031 ms
Memory 932 KB

Judge Result

Set Name Sample Subtask1 Subtask2
Score / Max Score 0 / 0 99 / 99 0 / 1
Status
AC × 2
WA × 1
AC × 20
AC × 24
WA × 4
TLE × 12
Set Name Test Cases
Sample sample_01.txt, sample_02.txt, sample_03.txt
Subtask1 subtask1_01.txt, subtask1_02.txt, subtask1_03.txt, subtask1_04.txt, subtask1_05.txt, subtask1_06.txt, subtask1_07.txt, subtask1_08.txt, subtask1_09.txt, subtask1_10.txt, subtask1_11.txt, subtask1_12.txt, subtask1_13.txt, subtask1_14.txt, subtask1_15.txt, subtask1_16.txt, subtask1_17.txt, subtask1_18.txt, subtask1_19.txt, subtask1_20.txt
Subtask2 subtask1_01.txt, subtask1_02.txt, subtask1_03.txt, subtask1_04.txt, subtask1_05.txt, subtask1_06.txt, subtask1_07.txt, subtask1_08.txt, subtask1_09.txt, subtask1_10.txt, subtask1_11.txt, subtask1_12.txt, subtask1_13.txt, subtask1_14.txt, subtask1_15.txt, subtask1_16.txt, subtask1_17.txt, subtask1_18.txt, subtask1_19.txt, subtask1_20.txt, subtask2_01.txt, subtask2_02.txt, subtask2_03.txt, subtask2_04.txt, subtask2_05.txt, subtask2_06.txt, subtask2_07.txt, subtask2_08.txt, subtask2_09.txt, subtask2_10.txt, subtask2_11.txt, subtask2_12.txt, subtask2_13.txt, subtask2_14.txt, subtask2_15.txt, subtask2_16.txt, subtask2_17.txt, subtask2_18.txt, subtask2_19.txt, subtask2_20.txt
Case Name Status Exec Time Memory
sample_01.txt WA 20 ms 928 KB
sample_02.txt AC 21 ms 920 KB
sample_03.txt AC 20 ms 748 KB
subtask1_01.txt AC 23 ms 928 KB
subtask1_02.txt AC 21 ms 804 KB
subtask1_03.txt AC 22 ms 928 KB
subtask1_04.txt AC 28 ms 924 KB
subtask1_05.txt AC 30 ms 800 KB
subtask1_06.txt AC 24 ms 844 KB
subtask1_07.txt AC 28 ms 812 KB
subtask1_08.txt AC 22 ms 924 KB
subtask1_09.txt AC 22 ms 928 KB
subtask1_10.txt AC 28 ms 932 KB
subtask1_11.txt AC 20 ms 928 KB
subtask1_12.txt AC 29 ms 920 KB
subtask1_13.txt AC 21 ms 924 KB
subtask1_14.txt AC 22 ms 912 KB
subtask1_15.txt AC 28 ms 796 KB
subtask1_16.txt AC 29 ms 736 KB
subtask1_17.txt AC 28 ms 928 KB
subtask1_18.txt AC 29 ms 764 KB
subtask1_19.txt AC 29 ms 772 KB
subtask1_20.txt AC 28 ms 804 KB
subtask2_01.txt WA 61 ms 924 KB
subtask2_02.txt AC 162 ms 792 KB
subtask2_03.txt WA 253 ms 800 KB
subtask2_04.txt WA 786 ms 808 KB
subtask2_05.txt TLE 2029 ms 800 KB
subtask2_06.txt AC 1849 ms 796 KB
subtask2_07.txt AC 1441 ms 800 KB
subtask2_08.txt TLE 2029 ms 884 KB
subtask2_09.txt TLE 2030 ms 808 KB
subtask2_10.txt TLE 2030 ms 800 KB
subtask2_11.txt TLE 2029 ms 924 KB
subtask2_12.txt TLE 2030 ms 808 KB
subtask2_13.txt WA 1089 ms 804 KB
subtask2_14.txt TLE 2030 ms 808 KB
subtask2_15.txt TLE 2031 ms 804 KB
subtask2_16.txt TLE 2030 ms 800 KB
subtask2_17.txt TLE 2029 ms 808 KB
subtask2_18.txt AC 1083 ms 800 KB
subtask2_19.txt TLE 2029 ms 880 KB
subtask2_20.txt TLE 2031 ms 792 KB