Submission #1158429

#	Time	Username	Problem	Language	Result	Execution time	Memory
1158429		Wendidiask	popa (BOI18_popa)	C++20	100 / 100	25 ms	464 KiB

popa

/*
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 */
 // Hello this is Tyx2019's clone
#include "popa.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define debug(x) cerr << #x << " is " << x << "\n"
#define hehe ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define rep(i, a, b) for (int i = a; i <= b; i++)
#define repb(i, a, b) for (int i = b; i >= a; i--)
#define pii pair<int, int>
#define linebreak cout << "---------------------------------------------------------\n"
#define f first
#define s second
#define pb push_back
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
// good luck
const ll MS = 1005, mod = 1e9+9, INF = 3e18, blk = 400;
int nextt[MS], L[MS], R[MS];
int build(int l, int r) {
	if (l > r) return -1;
	int m = l;
	while (nextt[m] <= r) m = nextt[m];
	L[m] = build(l, m-1); R[m] = build(m+1, r);
	return m;
}
int solve(int n, int *left, int *right) {
	stack<int> st;
	// next[i] = first index j such that a[j] divides a[i], ..., a[j].
	// i.e. first index j such that gcd(a[i, ... ,j]) = a[j]
	for (int i = 0; i < n; i++) {
		if (st.empty()) {
			st.push(i); continue;
		}
		while (!st.empty() and query(st.top(), i, i, i)) {
			nextt[st.top()] = i; st.pop();
		}
		st.push(i);
	}
	while (!st.empty()){
		nextt[st.top()] = MS-1; st.pop();
	}
	int root = build(0, n-1);
	for (int i = 0; i < n; i++) left[i] = L[i], right[i] = R[i];
	return root;
}

• Subtask 1: 37 / 37
• Subtask 2: 24 / 24
• Subtask 3: 39 / 39