oj.uz

Submission #718684

# Submission time Handle Problem Language Result Execution time Memory
718684 2023-04-04T14:06:31 Z lam Rainforest Jumps (APIO21_jumps) C++14
0 / 100
 258 ms 44036 KB 
#include "jumps.h"
#include <bits/stdc++.h>
#include <vector>
using namespace std;
const int maxn = 2e5 + 10;
int n;
int a[maxn],b[maxn],d[maxn];
vector <int> adj[maxn];
int par[20][maxn];
int f[20][maxn],g[20][maxn];
void create()
{
    for (int i=0; i<n; i++) f[0][i] = b[i];
    for (int j=1; (1<<j)<=n; j++)
        for (int i=0; i+(1<<j)-1<n; i++)
            f[j][i] = max(f[j-1][i],f[j-1][i+(1<<(j-1))]);
}

int get(int l, int r)
{
    if (l>r) return -1;
    int k=log2(r-l+1);
    return max(f[k][l],f[k][r-(1<<k)+1]);
}

void addedge(int u, int v)
{
    adj[u].push_back(v);
}
void init(int N, std::vector<int> H) {
    n=N;
    for (int i=0; i<n; i++) a[i]=H[i],adj[i].clear();
    deque<int> dq;
    for (int i=n-1; i>=0; i--)
    {
        while (!dq.empty()&&a[dq.back()] < a[i]) dq.pop_back();
        if (!dq.empty()) b[i] = dq.back(), d[i]=d[dq.back()]+1;
        else b[i] = -1,d[i]=0;
        dq.push_back(i);
    }
    while (!dq.empty()) dq.pop_back();
    for (int i=0; i<n; i++)
    {
        while (!dq.empty()&&a[dq.back()] < a[i]) dq.pop_back();
        if (!dq.empty()) par[0][i] = dq.back(), g[0][i] = d[i];
        else par[0][i]=-1, g[0][i] = -1e9;
        dq.push_back(i);
    }
    create();
    for (int i=0; i<n; i++)
        for (int j=1; j<20; j++)
            if (par[j-1][i]==-1) par[j][i]=-1,g[j][i] = -1e9;
            else
            {
                par[j][i]=par[j-1][par[j-1][i]];
                g[j][i] = max(g[j-1][i],g[j-1][par[j-1][i]]);
            }
}

int minimum_jumps(int A, int B, int C, int D) {
    if (A==C) return 0;
    if (a[A] > a[C]) return -1;
    int smx = get(B+1,C-1);
    int ans = 1e9;
    if (smx < a[C])
        ans = d[A] - d[C];
    int u=A;
    for (int i=19; i>=0; i--)
        if (par[i][u]!=-1&&a[par[i][u]] < a[C])
        {
            ans = min(ans,g[i][u]);
            u=par[i][u];
        }
    return ans;

}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5200 KB Output is correct
2 Correct 3 ms 5200 KB Output is correct
3 Incorrect 143 ms 44036 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 5200 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 5200 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 5200 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5200 KB Output is correct
2 Correct 3 ms 5200 KB Output is correct
3 Correct 3 ms 5228 KB Output is correct
4 Incorrect 258 ms 26872 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #6
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5200 KB Output is correct
2 Correct 3 ms 5200 KB Output is correct
3 Correct 3 ms 5228 KB Output is correct
4 Incorrect 258 ms 26872 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #7
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5200 KB Output is correct
2 Correct 3 ms 5200 KB Output is correct
3 Incorrect 143 ms 44036 KB Output isn't correct
4 Halted 0 ms 0 KB -