제출 #646242

#제출 시각아이디문제언어결과실행 시간메모리
646242Tenis0206수열 (APIO14_sequence)C++11
100 / 100
1662 ms84156 KiB
#include <bits/stdc++.h> #define int long long using namespace std; const int oo = INT_MAX; int n,k; int v[100005]; int sp[100005]; int dp[100005][2]; signed l[100005][205]; int sum(int st, int dr) { if(st > dr) { return 0; } return sp[dr] - sp[st - 1]; } void divide(int st, int dr, int min_chosen, int max_chosen, int j) { if(st > dr) { return; } int mij = (st + dr) >> 1; dp[mij][j % 2] = -oo; for(int p=min_chosen; p<=min(max_chosen,mij); p++) { if(dp[p-1][(j-1) % 2] + sum(p,mij) * sum(mij + 1, n) >= dp[mij][j % 2]) { dp[mij][j % 2] = dp[p-1][(j-1) % 2] + sum(p,mij) * sum(mij + 1, n); l[mij][j] = p - 1; } } divide(st,mij-1,min_chosen,l[mij][j] + 1,j); divide(mij+1,dr,l[mij][j]+1,max_chosen,j); } signed main() { ios::sync_with_stdio(false); cin.tie(0); cin>>n>>k; ++k; for(int i=1; i<=n; i++) { cin>>v[i]; sp[i] = sp[i-1] + v[i]; } for(int i=1; i<=n; i++) { dp[i][1] = sum(1,i) * sum(i + 1, n); } for(int j=2; j<=k; j++) { divide(1,n,1,n,j); } cout<<dp[n][k % 2]<<'\n'; int poz = n; vector<int> rez; while(poz) { poz = l[poz][k--]; if(poz) { rez.push_back(poz); } } reverse(rez.begin(),rez.end()); for(auto it : rez) { cout<<it<<' '; } cout<<'\n'; return 0; }
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