Submission #982526

#TimeUsernameProblemLanguageResultExecution timeMemory
982526vjudge1Rainforest Jumps (APIO21_jumps)C++17
4 / 100
615 ms9080 KiB
#include "jumps.h"
#include <bits/stdc++.h>
#include <vector>
using namespace std;
int n, L[200001], R[200001], dp[200001];
vector<int> g[200001];
void init(int N, std::vector<int> H) {
	n = N;
	stack<int> st;
	//for (int i = 0; i < N; i++) {
		//while (st.size() && H[st.top()] <= H[i]) st.pop();
		//if (st.size()) L[i] = st.top();
		//else L[i] = -1;
		//st.push(i);
	//}
	for (int i = N - 1; i >= 0; i--) {
		while (st.size() && H[st.top()] <= H[i]) st.pop();
		if (st.size()) R[i] = st.top();
		else R[i] = -1;
		st.push(i);
	}
}

int minimum_jumps(int A, int B, int C, int D) {
	return C - B;
	int ans = 1e9;
	for (int i = A; i <= B; i++) {
		for (int j = 0; j < n; j++) dp[j] = 1e9;
		dp[i] = 0;
		for (int j = i; j < n; j++) {
			if (R[j] != -1) dp[R[j]] = min(dp[R[j]], dp[j] + 1);
		}
		for (int j = C; j <= D; j++) ans = min(ans, dp[j]);
	}
  return (ans < 5e8 ? ans : -1);
}
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