제출 #43613

#제출 시각아이디문제언어결과실행 시간메모리
43613faustaadp수열 (APIO14_sequence)C++14
100 / 100
650 ms84468 KiB
#include<bits/stdc++.h> #define ll long long #define pb push_back #define mp make_pair #define fi first #define se second //#define getchar() getchar_unlocked() using namespace std; ll n,k,i,a[101010],p[101010],M,C,opt,j,vs; ll d[2][100010],te,seb; int op[201][100010],poi; int v[202]; pair<pair<ll,ll> ,int> vt[101010]; pair<pair<ll,ll> ,int> L1,L2,L3; bool bo; void bt(ll aa,ll bb) { ll ii,h=0; for(ii=0;ii<k;ii++) { v[h]=op[aa][bb]; h++; bb=op[aa][bb]+1; aa--; } } inline void fs(ll& p) { static char c; while ((c = getchar()) < '0'); for (p = c-'0'; (c = getchar()) >= '0'; p = p*10+c-'0'); } int main() { // ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0); //cin>>n>>k; fs(n); fs(k); for(i=1;i<=n;i++) { fs(a[i]); // cin>>a[i]; p[i]=p[i-1]+a[i]; } pair<pair<ll,ll>,ll> aa; ll ava; for(i=1;i<=k;i++) { // vt.clear(); // vt.reserve(n); poi=0; vs=0; te=0; seb=0; for(j=n-1;j>=1;j--) { M=p[j]; C=p[j]*p[n]-p[j]*p[j]+d[(i-1)&1][j+1]; aa=mp(mp(M,C),j); bo=0; while(vs>=2) { L1=vt[vs-1]; L2=vt[vs-2]; L3=aa; if((L2.fi.se-L1.fi.se)*(L2.fi.fi-L3.fi.fi)<(L3.fi.se-L2.fi.se)*(L1.fi.fi-L2.fi.fi)) break; // if(!bo&&L2.se>seb){te--;bo=1;} poi--; //vt.pop_back(); vs--; } vt[poi]=aa; poi++; //vt.push_back(aa); vs++; ava=p[j-1]; if(te==-1) te=0; while(te<vs-1) { L1=vt[te]; L2=vt[te+1]; if((L2.fi.se-L1.fi.se)>=(L1.fi.fi-L2.fi.fi)*ava) te++; else break; } seb=vt[te].se; opt=te; te--; op[i][j]=vt[opt].se; d[i&1][j]=(vt[opt].fi.fi*p[j-1]+vt[opt].fi.se-p[j-1]*p[n]); } } cout<<d[k%2][1]<<"\n"; bt(k,1); for(i=0;i<k;i++) if(i==k-1) cout<<v[i]<<"\n"; else cout<<v[i]<<" "; }
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