제출 #257591

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
257591		vaaven	수열 (APIO14_sequence)	C++14	33 / 100	81 ms	81144 KiB

sequence

/*
                                                                                                     
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                                           `//:-------:/:`                                          
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                                       `/y+o/---....---:+o.                                         
                                   `...````-os+/:---:/+o/--.`                                       
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            .:ooo+++++osso-`    `.:-...`/` ./::-------:/:`   -`         :+--..``````.--:+:...-+:-`  
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                                          `-+o+/:---:/+o/.                                          
                                            `.:+oooo+/-.`                                           
                                               ``````                                               
*/
// #pragma GCC optimize("Ofast,no-stack-protector")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
// #pragma GCC optimize("unroll-loops")
// #pragma GCC optimize("fast-math")
// #pragma GCC optimize("section-anchors")
// #pragma GCC optimize("profile-values,profile-reorder-functions,tracer")
// #pragma GCC optimize("vpt")
// #pragma GCC optimize("rename-registers")
// #pragma GCC optimize("move-loop-invariants")
// #pragma GCC optimize("unswitch-loops")
// #pragma GCC optimize("function-sections")
// #pragma GCC optimize("data-sections")
// #pragma GCC optimize("branch-target-load-optimize")
// #pragma GCC optimize("branch-target-load-optimize2")
// #pragma GCC optimize("btr-bb-exclusive")
// #pragma comment(linker, "/STACK:367077216")
#include <iostream>
#include <iostream>
#include <vector>
#include <algorithm>
#include <iomanip>
#include <tuple>
#include <math.h>
#include <set>
#include <stack>
#include <bitset>
#include <map>
#include <queue>
#include <random>
#include <unordered_set>
#include <unordered_map>
#define DEBUG
#define fi first
#define se second
#define pqueue priority_queue
#define pb(x) push_back(x)
//#define endl '\n'
#define all(x) x.begin(), x.end()
// #define int long  long
#define mk(a, b) make_pair(a, b)
 
using namespace std;
      
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef vector<int> vi;
typedef vector<vector<int> > vvi;
typedef vector<ull> vull;
typedef vector<ll> vll;
// typedef tuple<ll, ll, ll> tiii;
typedef pair<int, int> pii;
typedef vector<pair<int, int> > vpii;
typedef vector<bool> vb;
typedef vector<string> vs;
typedef vector< vector<ll> > vvll;
typedef vector<char> vc;
      
const int inf = 1e9 + 228;
const ll infll = 1e18;
const ll MOD = 1e9 + 7;
//static const int maxn = 1e6 + 228;
const ld eps = 1e-6;
const ld eps2 = 1e-9;
const ll MOD2 = 998244353;
const ll dosz = 5e5;
const ll SZ = (1<<18);
const ld PI = atan2l(0, -1);
     
void fast_io(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    // freopen("a.in", "r", stdin);
//    freopen("logs.out", "w", stdout);
}

const int maxn = 1e5 + 228;
int pref[maxn];
int p[maxn][201];

int sum(int l, int r){
  return pref[r]-pref[l-1];
}

void solve(){ 
  int n, k; 
  cin >> n >> k;
  vll dp1(n+1, -1);
  vll dp2(n+1, -1);
  for(int i=1; i<=n; i++){
    cin >> pref[i];
    pref[i] += pref[i-1];
  }
  for(int i=0; i<maxn; i++)
    for(int j=0; j<201; j++)
      p[i][j] = -1;

  for(int i=1; i<n; i++){
    dp1[i] = sum(1, i)*1ll*sum(i+1, n);
  }
  for(int j=2; j<=k; j++){
    for(int i=j; i<n; i++){
      int l = j-1, r = i-1;
      if(r-l>10){
        int ans = l;
        while(l<=r){
          int m1 = (l+r)/2;
          int m2 = m1+1;
          ll ans1 = dp1[m1] + sum(m1+1, i)*1ll*sum(i+1, n);
          ll ans2 = dp1[m2] + sum(m2+1, i)*1ll*sum(i+1, n);
          if(ans1<=ans2){
            ans = m1;
            l = m1+1;
          }
          else{
            r = m1-1;
          }
        }
        for(int d=max(ans-5, j-1); d<=min(ans+5, i-1); d++){
          ll ans1 = dp1[d] + sum(d+1, i)*1ll*sum(i+1, n);
          if(ans1>=dp2[i]){
            dp2[i] = ans1;
            p[i][j] = d;
          }
        }
      } else{
        for(int d=l; d<=r; d++){
          ll ans1 = dp1[d] + sum(d+1, i)*1ll*sum(i+1, n);
          if(ans1>=dp2[i]){
            dp2[i] = ans1;
            p[i][j] = d;
          }
        }
      }
    }
    dp1 = dp2;
    for(ll &i:dp2)
      i = -1;
  }
  int mx = k;
  for(int i=k; i<n; i++){
    if(dp1[mx]<dp1[i])
      mx = i;
  }
  vi ans;
  int cur = mx;
  int cnt = k;
  while(cnt){
    ans.pb(cur);
    cur = p[cur][cnt];
    cnt--;
  }
  cout << dp1[mx] << endl;
  reverse(all(ans));
  for(int i:ans)
    cout << i << " ";
}
 
signed main(){
    fast_io();
    // srand(time(NULL));
    // cout << fixed << setprecision(12);
    int q = 1;
    // cin >> q;
    while(q--)
        solve();
}

• Subtask 1: 11 / 11
• Subtask 2: 11 / 11
• Subtask 3: 11 / 11
• Subtask 4: 0 / 17
• Subtask 5: 0 / 21
• Subtask 6: 0 / 29