Submission #565555

#	Time	Username	Problem	Language	Result	Execution time	Memory
565555		MurotY	Rainforest Jumps (APIO21_jumps)	C++14	21 / 100	288 ms	16208 KiB

jumps

#include "jumps.h"
#include <bits/stdc++.h>
#define ll long long
using namespace std;
const int N=2*1e3+7;
vector <int> a;
vector <int> g[N];
bool u[N], u1[N];
int dp[N][N];


void init(int N, std::vector<int> H) {
    int n=N;
    a=H;
    vector <int> v;
    for (int i=n-1;i>=0;i--){
        while (!v.empty() && a[i] > a[v.back()]) v.pop_back();
        if (!v.empty()) g[i].push_back(v.back());
        v.push_back(i);
    }
    v.clear();
    for (int i=0;i<n;i++){
        while (!v.empty() && a[i] > a[v.back()]) v.pop_back();
        if (!v.empty()) g[i].push_back(v.back());
        v.push_back(i);
    }
    for (int i=0;i<n;i++){
        for (int j=0;j<n;j++) dp[i][j]=1e9;
        queue <int> q;
        q.push(i);
        dp[i][i]=0;
        while (!q.empty()){
            int x1=q.front();
            q.pop();
            for (auto l:g[x1]){
                if (dp[i][l] > dp[i][x1]+1){
                    dp[i][l]=dp[i][x1]+1;
                    q.push(l);
                }
            }
        }
    }
/*    for (int i=0;i<n;i++){
        for (int j=0;j<n;j++) cout << dp[i][j] <<" ";
        cout <<"\n";
    }*/

}

int minimum_jumps(int A, int B, int C, int D) {
    int ans=1e9;
    for (int i=A;i<=B;i++){
        for (int j=C;j<=D;j++){
            ans=min(ans, dp[i][j]);
        }
    }
    if (ans == 1e9) ans=-1;
    return ans;
}

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