Submission #1099640

#	Time	Username	Problem	Language	Result	Execution time	Memory
1099640		Saul0906	Rainforest Jumps (APIO21_jumps)	C++14	0 / 100	4086 ms	6164 KiB

jumps

#include "jumps.h"
#include <vector>
#include <bits/stdc++.h>
#define rep(a,b,c) for(int a=b; a<c; a++)
#define repr(a,b,c) for(int a=b-1; a>c-1; a--)
#define rep2(a,b,c,d) for(int a=b; a<c; a+=d)
#define repa(a,b) for(auto a:b)
#define fi first
#define se second
#define pb push_back
#define pq_min(a) priority_queue<a, vector<a>, greater<a>>

using namespace std;

using ll = long long int;
using vi = vector<int>;
using vll = vector<ll>;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int lim=2e5+5, inf=1e9;
int h[lim], lf[lim], rg[lim], n;

void init(int N, vi H) {
	n=N;
	rep(i,0,n) h[i]=H[i];
	stack<int> st;
	rep(i,0,n){
		while(st.size() && h[st.top()]<h[i]) st.pop();
		if(st.size()) lf[i]=st.top();
		st.push(i);
	}
	repr(i,n,0){
		while(st.size() && h[st.top()]<h[i]) st.pop();
		if(st.size()) rg[i]=st.top();
		st.push(i);
	}
}

int minimum_jumps(int A, int B, int C, int D) {
	int dp[n], ans=inf, u;
	pq_min(int) pq;
	fill(dp,dp+n,inf);
	rep(i,A,B+1) dp[i]=0;
	rep(i,0,D) pq.push(i);
	while(pq.size()){
		u=pq.top();
		pq.pop();
		dp[lf[u]]=min(dp[lf[u]],dp[u]+1);
		dp[rg[u]]=min(dp[rg[u]],dp[u]+1);
	}
	rep(i,C,D+1) ans=min(ans,dp[i]);
	if(ans==inf) return -1;
	return ans;
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 8
• Subtask 3: 0 / 13
• Subtask 4: 0 / 12
• Subtask 5: 0 / 23
• Subtask 6: 0 / 21
• Subtask 7: 0 / 19