Submission #569942

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
569942	2022-05-28 10:01:26	toastifishi	Rainforest Jumps (APIO21_jumps)	C++14	100 / 100	1084 ms	50592 KiB

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#include <bits/stdc++.h>
using namespace std;
const int MAXN = 2e5 + 5;
const int MAXLG = 20;
int n, heights[MAXN];
int L[MAXN][MAXLG], R[MAXN][MAXLG], high[MAXN][MAXLG];
void init(int N, vector<int> H) {
    n = N;
    heights[0] = heights[n + 1] = 1e9;
    for(int i = 0; i < n; i++) heights[i + 1] = H[i];
    vector <int> ii; ii.push_back(0);
    for(int i = 1; i <= n; i++) {
        while(heights[ii.back()] < heights[i]) ii.pop_back();
        L[i][0] = ii.back();
        ii.push_back(i);
    }
    ii.clear(); ii.push_back(n + 1);
    for(int i = n; i >= 1; i--) {
        while(heights[ii.back()] < heights[i]) ii.pop_back();
        R[i][0] = ii.back();
        ii.push_back(i);
        high[i][0] = ((heights[L[i][0]] > heights[R[i][0]] ? L[i][0] : R[i][0]));
    }
    R[n + 1][0] = n + 1;
    for(int p = 1; p <= 19; p++) {
        R[n + 1][p] = n + 1;
        for(int i = 1; i <= n; i++) {
            L[i][p] = L[L[i][p - 1]][p - 1];
            R[i][p] = R[R[i][p - 1]][p - 1];
 
 
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• Subtask 1: 4 / 4
• Subtask 2: 8 / 8
• Subtask 3: 13 / 13
• Subtask 4: 12 / 12
• Subtask 5: 23 / 23
• Subtask 6: 21 / 21
• Subtask 7: 19 / 19