mirror of
https://git.sb/baoshuo/OI-codes.git
synced 2024-12-24 03:31:59 +00:00
2428. [HAOI2006] 均分数据
https://hydro.ac/d/bzoj/record/633263575741ce0221187c0e
This commit is contained in:
parent
af265431c4
commit
2265bb7b7a
45
BZOJ/2428/2428.cpp
Normal file
45
BZOJ/2428/2428.cpp
Normal file
@ -0,0 +1,45 @@
|
||||
#include <iostream>
|
||||
#include <algorithm>
|
||||
#include <cmath>
|
||||
#include <iomanip>
|
||||
#include <numeric>
|
||||
#include <random>
|
||||
#include <vector>
|
||||
|
||||
using std::cin;
|
||||
using std::cout;
|
||||
const char endl = '\n';
|
||||
|
||||
int main() {
|
||||
std::ios::sync_with_stdio(false);
|
||||
cin.tie(nullptr);
|
||||
|
||||
int n, m;
|
||||
double ans = 1e9;
|
||||
std::mt19937 rng(std::random_device{}());
|
||||
|
||||
cin >> n >> m;
|
||||
|
||||
std::vector<int> a(n);
|
||||
|
||||
for (int& x : a) cin >> x;
|
||||
|
||||
for (int i = 0; i < 1000000; i++) {
|
||||
std::vector<int> b(m);
|
||||
|
||||
std::shuffle(a.begin(), a.end(), rng);
|
||||
|
||||
for (int x : a) {
|
||||
*std::min_element(b.begin(), b.end()) += x;
|
||||
}
|
||||
|
||||
double avg = static_cast<double>(std::accumulate(b.begin(), b.end(), 0)) / m;
|
||||
double variance = std::sqrt(std::accumulate(b.begin(), b.end(), 0.0, [&](double sum, int x) { return sum + std::pow(avg - x, 2); }) / m);
|
||||
|
||||
ans = std::min(ans, variance);
|
||||
}
|
||||
|
||||
cout << std::fixed << std::setprecision(2) << ans << endl;
|
||||
|
||||
return 0;
|
||||
}
|
BIN
BZOJ/2428/data/1.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/1.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/2428/data/1.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/1.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/2428/data/10.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/10.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/2428/data/10.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/10.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/2428/data/2.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/2.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/2428/data/2.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/2.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/2428/data/3.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/3.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/2428/data/3.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/3.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/2428/data/4.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/4.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/2428/data/4.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/4.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/2428/data/5.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/5.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/2428/data/5.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/5.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/2428/data/6.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/6.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/2428/data/6.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/6.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/2428/data/7.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/7.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/2428/data/7.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/7.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/2428/data/8.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/8.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/2428/data/8.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/8.out
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/2428/data/9.in
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/9.in
(Stored with Git LFS)
Normal file
Binary file not shown.
BIN
BZOJ/2428/data/9.out
(Stored with Git LFS)
Normal file
BIN
BZOJ/2428/data/9.out
(Stored with Git LFS)
Normal file
Binary file not shown.
Loading…
Reference in New Issue
Block a user