oj.uz

Submission #569633

# Submission time Handle Problem Language Result Execution time Memory
569633 2022-05-27T15:03:34 Z Turkhuu Rainforest Jumps (APIO21_jumps) C++17
4 / 100
 1010 ms 85620 KB 
#include "jumps.h"
#include <bits/stdc++.h>
using namespace std;
const int L = 18;
const int inf = 1000000000;
int n;
vector<int> a, lg;
vector<vector<int>> lo, hi, st, g;
bool subtask1 = true;
void init(int N, vector<int> H){
  n = N, a = H;
  g.resize(n);
  lg.resize(n + 1);
  lo.assign(n, vector(L, -1));
  hi.assign(n, vector(L, -1));
  st.assign(n, vector(L,  0));
  for(int i = 1; i < n; i++){
    if(a[i - 1] > a[i]){
      subtask1 = false;
    }
  }
  vector<int> idx(n);
  for(int i = 0; i < n; i++){
    idx[--a[i]] = i;
  }
  for(int i = 2; i <= n; i++){
    lg[i] = lg[i / 2] + 1;
  }
  for(int i = 0; i < n; i++){
    st[i][0] = a[i];
  }
  for(int j = 1; j < L; j++){
    for(int i = 0; i + (1 << j) - 1 < n; i++){
      st[i][j] = max(st[i][j - 1], st[i + (1 << (j - 1))][j - 1]);
    }
  }
  set<int> s;
  for(int i = n - 1; i >= 0; i--){
    auto j = s.lower_bound(idx[i]);
    int l = -1, r = -1;
    if(j != s.end()){
      r = a[*j];
      g[idx[i]].push_back(*j);
    }
    if(j != s.begin()){
      l = a[*prev(j)];
      g[idx[i]].push_back(*prev(j));
    }
    if(l != -1 && (r == -1 || l >= r)){
      lo[i][0] = r;
      hi[i][0] = l;
    } else{
      lo[i][0] = l;
      hi[i][0] = r;
    }
    s.insert(idx[i]);
  }
  for(int j = 1; j < L; j++){
    for(int i = 0; i < n; i++){
      if(lo[i][j - 1] != -1){
        lo[i][j] = lo[lo[i][j - 1]][j - 1];
      }
      if(hi[i][j - 1] != -1){
        hi[i][j] = hi[hi[i][j - 1]][j - 1];
      }
    }
  }
}
int minimum_jumps(int A, int B, int C, int D){
  if(subtask1){
    return C - B;
  }
  if(C == D){
    int L = lg[B - A + 1];
    int H = a[A]; //max(st[A][L], st[B - (1 << L) + 1][L]);
    int G = a[C], c = 0;
    for(int i = L - 1; i >= 0; i--){
      if(hi[H][i] != -1 && hi[H][i] <= G){
        H = hi[H][i];
        c += 1 << i;
      }
    }
    for(int i = L - 1; i >= 0; i--){
      if(lo[H][i] != -1 && lo[H][i] <= G){
        H = lo[H][i];
        c += 1 << i;
      }
    }
    if(H != G){
      c = -1;
    }
    return c;
  }
  queue<int> q;
  vector<int> d(n, inf);
  for(int i = A; i <= B; i++){
    d[i] = 0;
    q.push(i);
  }
  while(!q.empty()){
    int i = q.front();
    q.pop();
    if(C <= i && i <= D){
      return d[i];
    }
    for(int j : g[i]){
      if(d[i] + 1 < d[j]){
        d[j] = d[i] + 1;
        q.push(j);
      }
    }
  }
  return -1;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 1 ms 208 KB Output is correct
3 Correct 235 ms 68120 KB Output is correct
4 Correct 926 ms 85620 KB Output is correct
5 Correct 828 ms 43176 KB Output is correct
6 Correct 991 ms 85532 KB Output is correct
7 Correct 764 ms 58576 KB Output is correct
8 Correct 1010 ms 85548 KB Output is correct

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 208 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 208 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 208 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 1 ms 208 KB Output is correct
3 Correct 0 ms 208 KB Output is correct
4 Incorrect 327 ms 39180 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #6
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 1 ms 208 KB Output is correct
3 Correct 0 ms 208 KB Output is correct
4 Incorrect 327 ms 39180 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #7
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 1 ms 208 KB Output is correct
3 Correct 235 ms 68120 KB Output is correct
4 Correct 926 ms 85620 KB Output is correct
5 Correct 828 ms 43176 KB Output is correct
6 Correct 991 ms 85532 KB Output is correct
7 Correct 764 ms 58576 KB Output is correct
8 Correct 1010 ms 85548 KB Output is correct
9 Incorrect 0 ms 208 KB Output isn't correct
10 Halted 0 ms 0 KB -