Submission #503905

#	Time	Username	Problem	Language	Result	Execution time	Memory
503905		sumit_kk10	Split the sequence (APIO14_sequence)	C++17	0 / 100	40 ms	8156 KiB

sequence

#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, tr + 1); ++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);
		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;
}

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