Submission #859846

#	Time	Username	Problem	Language	Result	Execution time	Memory
859846		__Davit__	K blocks (IZhO14_blocks)	C++17	100 / 100	166 ms	43108 KiB

blocks

#include <bits/stdc++.h>

#define ll long long
#define lld long double
#define ff first
#define ss second
#define pb push_back
#define vr(v) v.begin(),v.end()
#define rv(v) v.rbegin(),v.rend()
#define Code ios_base::sync_with_stdio(false);
#define By cin.tie(NULL);
#define Davit cout.tie(NULL);
using namespace std;

int main() {
	int n, k;
	cin >> n >> k;
	vector<int> v(n+5);
	for (int i = 1; i <= n; i++)cin >> v[i];
	vector<vector<int>> dp(k+5, vector<int>(n+5,1e9));
	int mx = v[1];
	for (int i = 1; i <= n; i++) {
		mx = max(mx, v[i]);
		dp[1][i] = mx;	
	}
	for (int i = 2; i <= k; i++) {
		stack<int> s1, s2;
		for (int j = 1; j <= n; j++) {
			int my_dp = dp[i - 1][j - 1];
			while (!s1.empty() && s1.top() < v[j]) {
				my_dp = min(my_dp, s2.top());
				s1.pop();
				s2.pop();
			}
			if (s1.empty() || my_dp + v[j] < s1.top() + s2.top()) {
				s1.push(v[j]);
				s2.push(my_dp);
			}
			if(j>=i)dp[i][j] = s1.top() + s2.top();
		}
	}
	cout << dp[k][n] << endl;
	
}

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