Submission #855621

#	Time	Username	Problem	Language	Result	Execution time	Memory
855621		vjudge1	Split the sequence (APIO14_sequence)	C++17	0 / 100	215 ms	43612 KiB

sequence

#include <iostream>
#include <vector>
#include <set>
#include <cmath>
#include <algorithm>
#include <map>
#include <queue>
#include <deque>
#include <string>
#include <unordered_set>

#define Bekabot ios_base::sync_with_stdio(NULL);cin.tie(0);cout.tie(0);
#define fopen(s) freopen(s".in","r",stdin);freopen(s".out","w",stdout)
#define all(x) (x).begin(), (x).end()
#define len(x) (int)x.size()
#define pb push_back
#define pf push_front
#define popb pop_back
#define popf pop_front
#define elif else if
#define F first
#define S second
#define int long long
#define pii pair<int,int>
#define lb(v,x) (int)(lower_bound(all(v),x)-v.begin())
#define ub(v,x) (int)(upper_bound(all(v),x)-v.begin())

const int N = 1e5 + 78 , inf = 1e18 , M = 1e9 + 7;
using namespace std;

string trans(int n , int k){
    string s = "";
    while(n != 0){
        int d = n % k;
        if(d < 10){
            s = to_string(d) + s;
        }
        else{
            s = char(d + 'A' - 10) + s;
        }
        n /= k;
    }
    return s;
}
int pref[N] , suff[N];
int dp[10000][220];
int p[1000][220];
void solve(){
	int n , k;
	cin >> n >> k;
	int a[n + 1];
	int x = 0;
	for(int i = 1 ; i <= n ; i++){
		cin >> a[i];
		p[i][k] = i - 1;
	}
	for(int i = 1 ; i <= n ; i++)pref[i] = pref[i - 1]  + a[i];
	for(int i = n ; i >= 1 ; i--)suff[i] = suff[i + 1] + a[i];
	for(int l = 1 ; l <= k ; l++){
	for(int i = 1 ; i < n ; i++){
		for(int j = 0 ; j < i ; j++){
				if(dp[j][l - 1] + (pref[i] - pref[j]) * suff[i + 1] >= dp[i][l] + a[i]){
					p[i][l] = j;
				}
				dp[i][l] = max(dp[i][l] , dp[j][l - 1] + (pref[i] - pref[j]) * suff[i + 1]);
			
		}
	}
	}
	int cur=-1;
	int mx=-1;
	for(int i = 1 ; i <= n ; i++){
		if(dp[i][k] > mx){
			mx=dp[i][k];
			cur=i;
		}
	}
	cout << mx << '\n';
	for(int i=k;k>=1;k--){
		cout<<cur<<' ';
		cur=p[cur][k];
	}
//	v.pb(x);
	//for(auto it : g[n - 1][k])cout << it << ' ';

}

signed main(){
    Bekabot
    int t = 1;
    //cin >> t;
    while(t--){
		solve();
	}
}

Compilation message (stderr)

sequence.cpp: In function 'void solve()':
sequence.cpp:79:10: warning: unused variable 'i' [-Wunused-variable]
   79 |  for(int i=k;k>=1;k--){
      |          ^
sequence.cpp:52:6: warning: unused variable 'x' [-Wunused-variable]
   52 |  int x = 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