結果
| 問題 |
No.2488 Mod Sum Maximization
|
| コンテスト | |
| ユーザー |
ococonomy1
|
| 提出日時 | 2023-09-29 23:00:19 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 5,452 bytes |
| コンパイル時間 | 1,663 ms |
| コンパイル使用メモリ | 127,404 KB |
| 最終ジャッジ日時 | 2025-02-17 03:29:57 |
|
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 1 WA * 2 MLE * 1 -- * 34 |
ソースコード
// #pragma GCC target("avx2")
// #pragma GCC optimize("O3")
// #pragma GCC optimize("unroll-loops")
#include <algorithm>
#include <bitset>
#include <cassert>
#include <climits>
#include <cmath>
#include <complex>
#include <deque>
#include <iomanip>
#include <iostream>
#include <map>
#include <queue>
#include <set>
#include <string>
#include <tuple>
#include <vector>
using namespace std;
using lg = long long;
using pii = pair<int, int>;
using pll = pair<lg, lg>;
#define TEST cerr << "TEST" << endl
#define AMARI 998244353
//#define AMARI 1000000007
#define TEMOTO ((sizeof(long double) == 16) ? false : true)
#define TIME_LIMIT 1500 * (TEMOTO ? 1 : 1000)
#define el '\n'
#define El '\n'
// 疑似乱数(XorShift)
unsigned long xor128(void) {
static unsigned long x = 123456789, y = 362436069, z = 521288629, w = 88675123;
unsigned long t = (x ^ (x << 11));
x = y;
y = z;
z = w;
return (w = (w ^ (w >> 19)) ^ (t ^ (t >> 8)));
}
#define MULTI_TEST_CASE false
void solve(void) {
clock_t start = clock();
int n;
cin >> n;
lg ans = 0;
vector<lg> a(n);
for(int i = 0; i < n; i++){
cin >> a[i];
if(i != n -1)ans += a[i];
}
ans += a.back() % a[0];
lg kizyun = ans;
vector<pair<lg,int>> v(n,pair(LLONG_MIN / 2,-1));
for(int i = 1; i < n - 1; i++){
lg temp = kizyun;
temp -= a[i - 1] % a[i];
temp -= a[i] % a[i + 1];
temp -= a[n - 1] % a[0];
temp += a[i - 1] % a[i + 1];
temp += a[n - 1] % a[i];
temp += a[i] % a[0];
//cerr << i << ' ' << temp - kizyun << el;
ans = max(ans,temp);
v[i] = pair(temp - kizyun,i);
}
//sort(v.rbegin(),v.rend());
priority_queue<pair<lg,vector<int>>> que;
vector<int> tempvv(1);
for(int i = 0; i < n; i++){
tempvv[0] = i;
que.push(pair(v[i].first,tempvv));
}
int cccnt = 0;
while(!que.empty() && clock() - start < TIME_LIMIT){
lg val = que.top().first;
//tempには添え字が入っている
vector<int> temp = que.top().second;
que.pop();
sort(temp.begin(),temp.end());
vector<int> tempv(n);
if(tempv.size() == 2 && tempv[0] == 1 && tempv[1] == 2)TEST;
int idx = 0,idx2 = 0;
for(int i = 0; i < n; i++){
if(temp[idx] == i){
idx++;
continue;
}
tempv[idx2] = a[i];
idx2++;
}
lg templl = 0;
for(int i = 0; i < idx2 - 1; i++){
templl += tempv[i] % tempv[i + 1];
}
lg ptempll = templl;
do{
for(int i = idx2; i < n; i++){
tempv[i] = a[temp[i - idx2]];
}
templl = ptempll;
for(int i = idx2 - 1; i < n - 1; i++){
templl += tempv[i] % tempv[i + 1];
}
templl += tempv.back() % tempv[0];
//if(temp.size() == 2 && temp[0] == 1 && temp[1] == 5)cerr << templl << el;
ans = max(ans,templl);
if(temp.size() >= 5)break;
}while(next_permutation(temp.begin(),temp.end()));
if(temp.size() == 5)continue;
sort(temp.begin(),temp.end());
idx = 0;
temp.push_back(2 * n);
for(int i = 0; i < n; i++){
if(temp[idx] == i){
idx++;
continue;
}
if(val + v[i].first < -1000000)continue;
temp[temp.size() - 1] = i;
que.push(pair(val + v[i].first,temp));
}
cccnt++;
}
cout << ans << el;
return;
}
//a = {6545,13043,22287,82918,182145,245798,266209,334121}
//ans = 821460
//こっちが隣接して後ろに行った方
//8 6545 13043 22287 82918 182145 245798 266209 334121
//a = {7219,12725,36670,85461,108153,188204,285431,376068}
//ans = 726358
//こっちがバラバラに後ろに行った方
//7219 36670 85461 108153 285431 376068 188204 12725
//↑この形で最大を与えるらしい
//8 7219 12725 36670 85461 108153 188204 285431 376068
void calc(void) {
int n = 8;
vector<int> a(n);
for(int i = 0; i < n; i++){
if(i == 0)a[i] = xor128() % 10000 + 1;
else{
a[i] = a[i - 1] + min(max((unsigned long)0,xor128() % (xor128() / 10000)),(unsigned long)xor128() % 100000) + 1;
}
}
cout << "a = {";
for(int i = 0; i < n; i++){
if(i)cout << ',';
cout << a[i];
}
cout << "}\n";
lg ans = 0;
vector<int> tempv;
int cnt = 0;
do{
lg temp = 0;
for(int i = 0; i < n - 1; i++){
temp += a[i] % a[i + 1];
}
temp += a.back() % a[0];
if(temp > ans){
ans = temp;
tempv = a;
cnt = 0;
}
if(temp == ans)cnt++;
}while(next_permutation(a.begin(),a.end()));
int cnt2 = 0;
for(int i = 0; i < n - 1; i++){
if(tempv[i] > tempv[i + 1])cnt2++;
}
if(cnt2 >= 2){
cout << ans << el;
cout << cnt << el;
for(int i = 0; i < n; i++)cout << tempv[i] << ' ';
cout << el;
cout << el;
}
return;
}
int main(void) {
cin.tie(nullptr);
ios::sync_with_stdio(false);
/*
for(int i = 0; i < 1000; i++){
//calc();
}
*/
int t = 1;
if(MULTI_TEST_CASE) cin >> t;
while(t--) {
solve();
}
return 0;
}
ococonomy1