제출 #503869

#제출 시각아이디문제언어결과실행 시간메모리
503869sumit_kk10수열 (APIO14_sequence)C++17
0 / 100
48 ms8160 KiB
#include <bits/stdc++.h> #define fast ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL) #define S second #define F first #define pb push_back using namespace std; const int N = 2e5 + 5; const int MOD = 1e9 + 7; long long n, k, a[N], pre[N]; vector<pair<long long, int> > dp(N), cur_dp(N); long long C(int i, int j){ return (pre[i] - pre[j]) * pre[j]; } void compute(int l, int r, int tl, int tr){ if(l > r) return; int mid = (l + r) / 2; pair<long long, int> p = {INT_MIN, -1}; for(int i = tl; i <= min(mid - 1, tr); ++i){ if(dp[i].F + C(mid, i) > p.F){ p.F = dp[i].F + C(mid, i); p.S = i; } } if(p.S == -1) p.S = mid; cur_dp[mid] = p; compute(l, mid - 1, tl, p.second); compute(mid + 1, r, p.second, tr); } void solve(){ cin >> n >> k; for(int i = n - 1; i >= 0; --i) cin >> a[i]; pre[0] = a[0]; for(int i = 1; i < n; ++i) pre[i] = pre[i - 1] + a[i]; for(int i = 1; i <= k; ++i){ compute(0, n - 1, 0, n - 1); for(int j = 1; j < n; ++j){ if(cur_dp[j - 1].F > cur_dp[j].F) cur_dp[j] = cur_dp[j - 1]; } dp = cur_dp; } cout << dp[n - 1].F << '\n'; int pos = n - 1, ct = k; while(ct > 0){ cout << n - dp[pos].S - 1 << ' '; pos = dp[pos].S; --ct; } } int main(){ fast; int t = 1; // cin >> t; while(t--) solve(); return 0; }
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