Submission #380619

#	Time	Username	Problem	Language	Result	Execution time	Memory
380619		SavicS	K blocks (IZhO14_blocks)	C++14	0 / 100	1 ms	512 KiB

blocks

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <bits/stdc++.h>

#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define ff(i,a,b) for(int i=a;i<=b;i++)
#define fb(i,b,a) for(int i=b;i>=a;i--)

using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef pair<int,ll> pii;
const int maxn = 105;
const ll inf = 1e14 + 5;

template<typename T>
using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

// os.order_of_key(k) the number of elements in the os less than k
// *os.find_by_order(k)  print the k-th smallest number in os(0-based)

int n, k;
int niz[maxn];

ll dp[maxn][maxn];

int main() {
	ios::sync_with_stdio(false);
	cout.tie(nullptr);
	cin.tie(nullptr);
	cin >> n >> k;
	ff(i,1,n)cin >> niz[i];
	ff(i,0,n) {
		ff(j,0,k)dp[i][j] = inf;
	}
	int mx = 0;
	ff(i,1,n){
		mx = max(mx, niz[i]);
		dp[i][1] = mx;
	}
	ff(j,2,k){
		deque<pii> dq;
		ff(i,1,n){
			int x = niz[i];
			ll mn = dp[i - 1][j - 1];
			while(!dq.empty() && dq.back().fi <= x){
				mn = min(mn, dq.back().se);
				dq.pop_back();
			}
			if(dq.empty() || mn + x <= dq.front().fi + dq.front().se){
				dq.push_front({x, mn});
			}
			if(i < j)continue;
			dp[i][j] = dq.front().fi + dq.front().se;
		}
	}
	cout << dp[n][k] << endl;
	return 0;
}
/**

5 5
1 2 3 4 5

5 2
1 2 3 4 5


// probati bojenje sahovski ili slicno

**/

• Subtask 1: 0 / 14
• Subtask 2: 0 / 18
• Subtask 3: 0 / 21
• Subtask 4: 0 / 47