Submission #566688

#	Time	Username	Problem	Language	Result	Execution time	Memory
566688		Ooops_sorry	Rainforest Jumps (APIO21_jumps)	C++14	0 / 100	4035 ms	3356 KiB

jumps

#include<bits/stdc++.h>
#ifndef LOCAL
    #include "jumps.h"
#endif

#define ld long double
#define ll long long
#define pb push_back

const int INF = 1e9;

using namespace std;
int n;
vector<int> h, l, r;

void init(int N, std::vector<int> H) {
    h = H;
    n = N;
    l.resize(n, -1);
    r.resize(n, n);
    deque<int> q;
    for (int i = 0; i < n; i++) {
        for (int j = i + 1; j < n; j++) {
            if (h[i] > h[j]) {
                r[j] = min(r[j], i);
            }
        }
        for (int j = i - 1; j >= 0; j--) {
            if (h[i] > h[j]) {
                l[j] = max(l[j], i);
            }
        }
    }
}

int minimum_jumps(int a, int b, int c, int d) {
    int j = c, k = -1;
    for (int i = c; i <= d; i++) {
        if (h[i] > h[j]) {
            j = i;
        }
    }
    for (int i = a; i <= b; i++) {
        if (h[i] < h[j] && (k == -1 || h[i] > h[k])) {
            k = i;
        }
    }
    if (k == -1) return -1;
    int cnt = 1;
    while (r[k] < c) {
        int L = l[k], R = r[k];
        cnt++;
        if (L == -1) {
            k = R;
        } else if (R == -1) {
            k = L;
        } else {
            if (h[L] > h[R] && h[L] < h[j]) {
                k = L;
            } else {
                k = R;
            }
        }
    }
    return cnt;
}

#ifdef LOCAL

int main() {
  int N, Q;
  assert(2 == scanf("%d %d", &N, &Q));
  std::vector<int> H(N);
  for (int i = 0; i < N; ++i) {
    assert(1 == scanf("%d", &H[i]));
  }
  init(N, H);

  for (int i = 0; i < Q; ++i) {
    int A, B, C, D;
    assert(4 == scanf("%d %d %d %d", &A, &B, &C, &D));
    printf("%d\n", minimum_jumps(A, B, C, D));
  }
  return 0;
}

#endif

• 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