Submission #428749

#	Time	Username	Problem	Language	Result	Execution time	Memory
428749		hhhhaura	Rainforest Jumps (APIO21_jumps)	C++14	0 / 100	4034 ms	15208 KiB

jumps

#define wiwihorz
#include "jumps.h"
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma loop-opt(on)

#define rep(i, a, b) for(int i = a; i <= b; i++)
#define rrep(i, a, b) for(int i = b; i >= a; i--)
#define ceil(a, b) ((a + b - 1) / (b))
#define all(x) x.begin(), x.end()

#define MOD 1000000007
#define eps (1e-9)
#define INF 1000000000
using namespace std;

#define lld long double
#define pii pair<int, int>
#define random mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count())

#ifdef wiwihorz
#define print(a...) kout("[" + string(#a) + "] = ", a)
void vprint(auto L, auto R) {while(L < R) cerr << *L << " \n"[next(L) == R], ++L; }
void kout() {cerr << endl; }
template<class T1, class ... T2> void kout(T1 a, T2 ... e) { cerr << a << " ", kout(e...);}
#else
#define print(...) 0
#define vprint(...) 0
#endif
int n;
vector<int> L, R, d, h;

void init(int N, vector<int> H) {
	n = N, h = H;
	set<int> s; vector<int> a(n, 0);
	L.assign(n, -1);
	R.assign(n, -1);
	d.assign(n, 0);
	
	rep(i, 0, n - 1) a[i] = i;
	sort(all(a), [](int x, int y) { return h[x] > h[y]; });
	for(auto i : a) {
		auto it = s.lower_bound(i);
		if(it != s.end()) {
			d[i] = d[*it] + 1;
			R[i] = *it; 	
		}
		if(it != s.begin()) {
			it = prev(it);
			L[i] = *it;
		}
		s.insert(i);
	}
//	vprint(all(L));
//	vprint(all(R));
//	vprint(all(d));
	return;
}
/*
7 3
3 2 1 6 4 5 7
4 4 6 6
1 3 5 6
0 1 2 2 
*/
int minimum_jumps(int A, int B, int C, int D) {
	int to = C, from = -1;
	rep(i, C, D) if(h[i] > h[to]) to = i;
	rep(i, A, B) if(h[i] < h[to]) {
		if(from == -1 || h[from] < h[i]) from = i;
	}
	if(from == -1) return -1;
	rep(i, from, to) if(h[i] > h[to]) return -1;
	int cnt = 0, cur = 0, id = from, ans = INF;
	while(id != -1) {
		if(h[id] > h[to]) break;
		cur = id; 
		while(cur < C) cur = R[cur];
		ans = min(ans, cnt + d[id] - d[cur]);
		cnt ++, id = L[id];
	}
	return ans;
}

Compilation message (stderr)

jumps.cpp:5: warning: ignoring '#pragma loop ' [-Wunknown-pragmas]
    5 | #pragma loop-opt(on)
      | 
jumps.cpp:23:13: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   23 | void vprint(auto L, auto R) {while(L < R) cerr << *L << " \n"[next(L) == R], ++L; }
      |             ^~~~
jumps.cpp:23:21: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   23 | void vprint(auto L, auto R) {while(L < R) cerr << *L << " \n"[next(L) == R], ++L; }
      |                     ^~~~

• 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