Submission #2702996
Source Code Expand
/* main code starts from line 133. */
/* ---------- STL Libraries ---------- */
// IO library
#include <cstdio>
#include <iomanip>
#include <ios>
#include <iostream>
// algorithm library
#include <algorithm>
#include <cmath>
#include <numeric>
// container library
#include <array>
#include <bitset>
#include <map>
#include <queue>
#include <set>
#include <string>
#include <vector>
/* ---------- Namespace ---------- */
using namespace std;
/* ---------- Type Abbreviation ---------- */
template <typename T>
using V = vector<T>;
template <typename T, typename U>
using P = pair<T, U>;
template <typename T>
using PQ = priority_queue<T>;
template <typename T>
using GPQ = priority_queue<T, vector<T>, greater<T>>;
using ll = long long;
#define fst first
#define snd second
#define pb push_back
#define mp make_pair
#define mt make_tuple
/* ---------- conversion ---------- */
#define INT(c) static_cast<int>(c)
#define CHAR(n) static_cast<char>(n)
#define LL(n) static_cast<ll>(n)
#define DOUBLE(n) static_cast<double>(n)
/* ---------- container ---------- */
#define ALL(v) (v).begin(), (v).end()
#define SIZE(v) (LL((v).size()))
#define FIND(v, k) (v).find(k) != (v).end()
#define VFIND(v, k) find(ALL(v), k) != (v).end()
#define SORT(v) sort(ALL(v))
#define GSORT(v) sort(ALL(v), greater<decltype((v).front())>())
/* ---------- repetition ---------- */
#define FOR(i, a, b) for (ll i = (a); i < (b); i++)
#define REP(i, n) FOR(i, 0, n)
#define NREP(i, n) FOR(i, 1, n + 1)
#define RFOR(i, a, b) for (ll i = (a); i >= (b); i--)
#define RREP(i, n) RFOR(i, n - 1, 0)
#define RNREP(i, n) RFOR(i, n, 1)
// Usual REP runs from 0 to n-1 (R: n-1 to 0)
// Natural REP runs from 1 to n (R: n to 1)
/* ---------- Short Functions ---------- */
template <typename T>
T sq(T a) {
return a * a;
}
#define fcout cout << fixed << setprecision(10)
/* ----------- debug ---------- */
template <typename T, typename U>
void testP2(T a, U b) {
cout << "(" << a << ", " << b << ")" << endl;
return;
}
template <typename T>
void testV(T v) {
cout << "[";
for (auto i : v) {
cout << i << ", ";
}
cout << "\b\b]" << endl;
return;
}
template <typename T>
void testV2(T v) {
for (auto sv : v) {
testV(sv);
}
cout << endl;
return;
}
#define GET_VAR_NAME(variable) #variable
#define test(x) cout << GET_VAR_NAME(x) << " = " << x << endl;
#define testP(p) \
cout << GET_VAR_NAME(p) << " = "; \
testP2(p.fst, p.snd);
/* ---------- Constants ---------- */
// const ll MOD = 1e9 + 7;
// const int INF = 1 << 25;
const ll INF = 1LL << 50;
// const double PI = acos(-1);
// const double EPS = 1e-10;
// const ll dx[4] = {0, -1, 1, 0};
// const ll dy[4] = {-1, 0, 0, 1};
// const ll dx[8] = {-1, 0, 1, -1, 1, -1, 0, 1};
// const ll dy[8] = {-1, -1, -1, 0, 0, 1, 1, 1};
/* v-v-v-v-v-v-v-v-v Main Part v-v-v-v-v-v-v-v-v */
/* ---------- Type Definition ----------- */
/* ---------- Global Variance ----------- */
/* ------------- Functions -------------- */
/* ----------- Main Function ------------ */
int main() {
cin.tie(0);
ios::sync_with_stdio(false);
ll N;
cin >> N;
V<ll> C(N);
REP(i, N) {
cin >> C[i];
}
C.pb(INF);
SORT(C);
double ans = 0;
ll mul = 1;
REP(i, N) {
if (C[i] == C[i + 1]) {
mul++;
continue;
}
ll cnt = 0;
REP(j, i) {
if (C[i] % C[j] == 0) cnt++;
}
double p;
if (cnt % 2 == 0) {
p = DOUBLE(cnt / 2 + 1) / (cnt + 1);
} else {
p = 0.5;
}
ans += p * mul;
mul = 1;
}
fcout << ans << endl;
return 0;
}
Submission Info
Submission Time |
|
Task |
C - コイン |
User |
Tiramister |
Language |
C++14 (GCC 5.4.1) |
Score |
100 |
Code Size |
3922 Byte |
Status |
AC |
Exec Time |
1 ms |
Memory |
256 KB |
Judge Result
Set Name |
Sample |
Subtask1 |
Subtask2 |
Score / Max Score |
0 / 0 |
99 / 99 |
1 / 1 |
Status |
|
|
|
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 |
AC |
1 ms |
256 KB |
sample_02.txt |
AC |
1 ms |
256 KB |
sample_03.txt |
AC |
1 ms |
256 KB |
subtask1_01.txt |
AC |
1 ms |
256 KB |
subtask1_02.txt |
AC |
1 ms |
256 KB |
subtask1_03.txt |
AC |
1 ms |
256 KB |
subtask1_04.txt |
AC |
1 ms |
256 KB |
subtask1_05.txt |
AC |
1 ms |
256 KB |
subtask1_06.txt |
AC |
1 ms |
256 KB |
subtask1_07.txt |
AC |
1 ms |
256 KB |
subtask1_08.txt |
AC |
1 ms |
256 KB |
subtask1_09.txt |
AC |
1 ms |
256 KB |
subtask1_10.txt |
AC |
1 ms |
256 KB |
subtask1_11.txt |
AC |
1 ms |
256 KB |
subtask1_12.txt |
AC |
1 ms |
256 KB |
subtask1_13.txt |
AC |
1 ms |
256 KB |
subtask1_14.txt |
AC |
1 ms |
256 KB |
subtask1_15.txt |
AC |
1 ms |
256 KB |
subtask1_16.txt |
AC |
1 ms |
256 KB |
subtask1_17.txt |
AC |
1 ms |
256 KB |
subtask1_18.txt |
AC |
1 ms |
256 KB |
subtask1_19.txt |
AC |
1 ms |
256 KB |
subtask1_20.txt |
AC |
1 ms |
256 KB |
subtask2_01.txt |
AC |
1 ms |
256 KB |
subtask2_02.txt |
AC |
1 ms |
256 KB |
subtask2_03.txt |
AC |
1 ms |
256 KB |
subtask2_04.txt |
AC |
1 ms |
256 KB |
subtask2_05.txt |
AC |
1 ms |
256 KB |
subtask2_06.txt |
AC |
1 ms |
256 KB |
subtask2_07.txt |
AC |
1 ms |
256 KB |
subtask2_08.txt |
AC |
1 ms |
256 KB |
subtask2_09.txt |
AC |
1 ms |
256 KB |
subtask2_10.txt |
AC |
1 ms |
256 KB |
subtask2_11.txt |
AC |
1 ms |
256 KB |
subtask2_12.txt |
AC |
1 ms |
256 KB |
subtask2_13.txt |
AC |
1 ms |
256 KB |
subtask2_14.txt |
AC |
1 ms |
256 KB |
subtask2_15.txt |
AC |
1 ms |
256 KB |
subtask2_16.txt |
AC |
1 ms |
256 KB |
subtask2_17.txt |
AC |
1 ms |
256 KB |
subtask2_18.txt |
AC |
1 ms |
256 KB |
subtask2_19.txt |
AC |
1 ms |
256 KB |
subtask2_20.txt |
AC |
1 ms |
256 KB |