Submission #162158

#	Time	Username	Problem	Language	Result	Execution time	Memory
162158		kostia244	Split the sequence (APIO14_sequence)	C++14	28 / 100	210 ms	3608 KiB

sequence

//#pragma comment(linker, "/stack:200000000")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
//#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>
#include<bits/extc++.h>
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define pb push_back
using namespace std;
using namespace __gnu_pbds;
using ll = long long;
using vi = vector<ll>;
using vvi = vector<vector<ll>>;
const ll mod = 998244353;
using oset = tree<pair<int, int>, null_type, less<pair<int, int>>, rb_tree_tag, tree_order_statistics_node_update>;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int MN = 1e3 + 3;
ll n, a[MN], pref[MN], dp[MN][MN], C[MN][MN], p[MN][MN];
ll f(ll l, ll r, ll i) {
	ll a = pref[i] - pref[l - 1];
	ll b = pref[r] - pref[i];
	return a * b;
}
void bt(int a, int b) {
	cout << b << " ";
	if(a>1)
		bt(a-1, p[a][b]);
}
int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	ll k;
	cin >> n >> k;
	for (int i = 1; i <= n; i++)
		cin >> a[i], pref[i] = pref[i - 1] + a[i];
	ll ans = 0, g;
	for(int a = 1; a <= k; a++) {
		for(int i = 1; i <= n; i++) {
			for(int j = 1; j <= i; j++) {
				ll t = dp[a-1][j-1] + f(j, n, i);
				dp[a][i] = max(dp[a][i], t);
				if(dp[a][i]==t)
					p[a][i]=j-1;
			}
			ans = max(ans, dp[a][i]);
			if(ans==dp[a][i]) g=i;
		}
	}

	cout << ans << '\n';
	bt(k, g);
}

Compilation message (stderr)

sequence.cpp: In function 'int main()':
sequence.cpp:52:4: warning: 'g' may be used uninitialized in this function [-Wmaybe-uninitialized]
  bt(k, g);
  ~~^~~~~~

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