Submission #1084990

#	Time	Username	Problem	Language	Result	Execution time	Memory
1084990		xnqs	K blocks (IZhO14_blocks)	C++17	53 / 100	1095 ms	1620 KiB

blocks

#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
#include <utility>
#include <algorithm>
#include <cstring>
#include <random>

std::mt19937 rng(53);
 
int x, k;
int arr[100005];
int dp[105][100005];
int pge[100005];

void augment(int p) {
	for (int i = 0; i < p; i++) {
		dp[p][i] = 0x3f3f3f3f;
	}
	for (int i = p; i <= x; i++) {
		dp[p][i] = 0x3f3f3f3f;
		int pos = i;
		while (pos>0) {
			int next = pge[pos];
			for (int j = next+1; j <= pos; j++) {
				dp[p][i] = std::min(dp[p][i], dp[p-1][j-1] + arr[pos]);
			}
			pos = next;
		}
	}
}

int main() {
	std::ios_base::sync_with_stdio(false);
	std::cin.tie(NULL);
	std::cout.tie(NULL);
 
	std::cin >> x >> k;
	std::vector<int> stk;
	for (int i = 1; i <= x; i++) {
		std::cin >> arr[i];
		while (!stk.empty()&&arr[i]>=arr[stk.back()]) {
			stk.pop_back();
		}
		pge[i] = ((stk.empty()) ? 0 : stk.back());
		stk.emplace_back(i);
	}

	for (int i = 1; i <= x; i++) {
		dp[1][i] = std::max(dp[1][i-1],arr[i]);
	}
	dp[1][0] = 0x3f3f3f3f;
	for (int p = 2; p <= k; p++) {
		augment(p);
	}

	std::cout << dp[k][x] << "\n";
}

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