結果
| 問題 |
No.5020 Averaging
|
| コンテスト | |
| ユーザー |
Pechi
|
| 提出日時 | 2024-02-25 14:36:32 |
| 言語 | C++17(gcc12) (gcc 12.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 954 ms / 1,000 ms |
| コード長 | 3,361 bytes |
| コンパイル時間 | 3,283 ms |
| コンパイル使用メモリ | 226,852 KB |
| 実行使用メモリ | 6,676 KB |
| スコア | 31,289,794 |
| 最終ジャッジ日時 | 2024-02-25 14:37:37 |
| 合計ジャッジ時間 | 53,614 ms |
|
ジャッジサーバーID (参考情報) |
judge14 / judge12 |
| 純コード判定しない問題か言語 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 50 |
ソースコード
#define _USE_MATH_DEFINES
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#include<bits/stdc++.h>
#include<unordered_map>
#include<random>
#include <array>
#include <complex>
#include<chrono>
using namespace std;
#define LP(I,S,G) for (long long int I = (S); I < (G); ++I)
#define IN(X) for (int in = 0; in < X.size(); in++)cin >> X[in]
#define OUT(X) for (int in = 0; in < X.size(); in++)cout << X[in]<<" "
#define SORT(X) sort((X).begin(), (X).end())
#define CSORT(X,Y) sort(X.begin(), X.end(),Y)
#define COPY(X,Y) copy(X.begin(), X.end(), Y.begin())
#define ALL(X,Y) for (auto (X) :(Y))
#define FULL(a) (a).begin(),(a).end()
#define BFS(Q,S) for(Q.push(S);Q.size()!=0;Q.pop())
typedef long long int ll;
typedef unsigned long long int ull;
long long int M = 998244353;
chrono::system_clock::time_point starttime;
using namespace std::chrono;
#ifndef ONLINE_JUDGE
#define DEBUG
#endif
inline float getTime() {
#ifdef DEBUG
return duration_cast<milliseconds>(system_clock::now() - starttime).count() /2.0;
#else
return duration_cast<milliseconds>(system_clock::now() - starttime).count();
#endif
}
int dx[] = { -1,0,1,0 }, dy[] = { 0,1,0,-1 };
ll MAX(ll A, ll B) { return ((A) > (B) ? (A) : (B)); }
ll MIN(ll A, ll B) { return ((A) < (B) ? (A) : (B)); }
inline long long int xor128() {
static long long int x = 123456789, y = 362436069, z = 521288629, w = 88675123;
long long int t = (x ^ (x << 11));
x = y; y = z; z = w;
return (w = (w ^ (w >> 19)) ^ (t ^ (t >> 8)));
}
long long int pow_n(long long int x, long long int n) {
if (n == 0)
return 1;
if (n % 2 == 0)
return pow_n(x * x, n / 2);
else
return x * pow_n(x, n - 1);
}
ll border = 5 * pow_n(10, 17);
double calc_score(vector<ll> a, vector<ll> b, vector<pair<ll, ll>>& ans) {
for (int i = 0; i < ans.size(); ++i) {
int u = ans[i].first, v = ans[i].second;
a[u] = a[v] = (a[u] + a[v]) / 2;
b[u] = b[v] = (b[u] + b[v]) / 2;
}
return log10(max(abs(border - a[0]), abs(border - b[0])) + 1);
}
int main(int argc, char* argv[]) {
starttime = chrono::system_clock::now();
ios::sync_with_stdio(false);
std::cin.tie(nullptr);
mt19937 rnd(0);
ll n, t = 50, now = 0;
cin >> n;
vector<ll> a(n), b(n);
LP(i, 0, n)cin >> a[i] >> b[i];
vector<pair<ll, ll>> ans(t);
LP(i, 0, t) {
ans[i].first = xor128() % n;
ans[i].second = xor128() % (n - 1);
if (ans[i].second >= ans[i].first)++ans[i].second;
}
double score = calc_score(a, b, ans);
vector<int> table(t);
for (int i = 0; i < t; ++i)table[i] = i;
double time;
shuffle(table.begin(), table.end(), rnd);
while ((time=getTime()) <= 950) {
double temp = (950 - time) / 950.0;
int i = table[now];
int bx = ans[i].first, by = ans[i].second;
ans[i].first = xor128() % n;
ans[i].second = xor128() % (n - 1);
if (ans[i].first != 0 && ans[i].second != 0 && xor128() % 10 == 0)ans[i].first = 0;
if (ans[i].second >= ans[i].first)++ans[i].second;
double new_score = calc_score(a, b, ans);
if (xor128() % 10000 < exp((score-new_score) / temp) * 10000) {
score = new_score;
}
else {
ans[i].first = bx;
ans[i].second = by;
}
if (++now == t) {
now = 0;
shuffle(table.begin(), table.end(), rnd);
}
}
cerr << "score:" << ll(2000000 - 100000 * calc_score(a, b, ans)) << "\n";
cout << ans.size() << "\n";
ALL(x, ans)cout << x.first+1 << " " << x.second+1 << "\n";
exit(0);
}
Pechi