oj.uz

Submission #1000698

# Submission time Handle Problem Language Result Execution time Memory
1000698 2024-06-18T07:20:49 Z shenfe1 Split the sequence (APIO14_sequence) C++17
0 / 100
 48 ms 131072 KB 
#include <bits/stdc++.h>
 
#define ll long long
#define lb lower_bound
#define pii pair<int,int>
#define pll pair<ll,ll>
#define F first
#define S second
#define ld long double
#define pb push_back
#define all(v) v.begin(),v.end()
#define in insert
#define sz(s) (int)s.size()
#define int ll
#define ppb pop_back

using namespace std;
 
const int MAX=2e5+10;
const int inf=2e9;

int n,k;
int a[MAX];
int dp[MAX][211];
int pr[MAX][211];
int p[MAX];

struct CHT{

  vector<pii> vec;
  vector<int> num;
  int pos;

  void init(){
    pos=0;
    vec.clear();
    num.clear();
  }

  ld inter(pii a,pii b){
    // cout<<b.F<<" "<<a.F<<"\n";
    return (0.0+a.S-b.S)/(b.F-a.F);
  }

  void add(int k,int x,int i){
    // cout<<k<<" "<<x<<"\n";
    while(!vec.empty()&&vec.back().F==k){
      if(vec.back().S<x){
        vec.ppb();
        num.ppb();
      }
      else{
        return;
      }
    }
    while(sz(vec)>=2&&inter(vec.back(),vec[sz(vec)-2])>=inter(vec[sz(vec)-2],{k,x})){
      vec.ppb();
      num.ppb();
    }
    vec.pb({k,x});
    num.pb(i);
    pos=min(pos,sz(vec)-1);
  }

  int get(pii a,int x){
    return a.F*x+a.S;
  }

  int get(int X){
    while(pos+1<sz(vec)&&get(vec[pos],X)<=get(vec[pos+1],X))pos++;
    return get(vec[pos],X);
  }

}C;

void solve(){
  cin>>n>>k;
  for(int i=1;i<=n;i++)cin>>a[i];
  for(int i=1;i<=n;i++){
    p[i]=p[i-1]+a[i];
    dp[i][1]=0;
  }
  // for(int K=2;K<=k+1;K++){
  //   C.init();
  //   for(int i=K;i<=n;i++){
  //     C.add(p[i-1],dp[i-1][K-1]-p[i-1]*p[i-1],i-1);
  //     dp[i][K]=C.get(p[i]);
  //     pr[i][K]=C.num[C.pos];
  //     // cout<<i<<" "<<K<<" "<<pr[i][K]<<"\n";
  //   }
  // }
  cout<<dp[n][k+1]<<"\n";
  // vector<int> ans;
  // int cur=n;
  // while(k>=0){
  //   ans.pb(cur);
  //   cur=pr[cur][(k+1)];
  //   k--;
  // }
  // sort(all(ans));
  // ans.ppb();
  // for(int x:ans){
  //   cout<<x;
  //   if(x!=ans.back())cout<<" ";
  // }
}

// #ifdef LOCAL
signed main(){
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int t=1;
  // cin>>t;
  while(t--)solve();
}
// #endif

Subtask #1
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2396 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 4444 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 604 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #4
0 / 17.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2140 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Incorrect 8 ms 19288 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Runtime error 48 ms 131072 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -