Submission #348456

#	Time	Username	Problem	Language	Result	Execution time	Memory
348456		Kevin_Zhang_TW	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	100 / 100	1018 ms	61460 KiB

sortbooks

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb emplace_back
#define AI(i) begin(i), end(i)
template<class T> bool chmin(T &a, T b) { return b < a && (a = b, true); }
template<class T> bool chmax(T &a, T b) { return a < b && (a = b, true); }
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template<class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
template<class T> void debug(T L, T R) { while (L != R) cerr << *L << " \n"[next(L) == R], ++L; }
#else
#define DE(...) 0
#define debug(...) 0
#endif

const int MAX_N = 1000010, p = 1e9 + 7;

int n, m, w[MAX_N], mx[MAX_N], res[MAX_N], req[MAX_N];

void update(int i, int v) {
	i = n - i + 1;
	for (;i <= n;i += i&-i) 
		chmax(mx[i], v);
}
int qry(int i) {
	i = n - i + 1;
	int res = 0;
	for (;i;i ^= i&-i)
		chmax(res, mx[i]);
	return res;
}

int dq[MAX_N], dl;

vector<pair<int,int>> allq[MAX_N];

int32_t main() {
	ios_base::sync_with_stdio(0), cin.tie(0);

	cin >> n >> m;

	for (int i = 1;i <= n;++i) 
		cin >> w[i];

	for (int i = 0, l, r, k;i < m;++i) {
		cin >> l >> r >> k;
		allq[r].pb(l, i);
		req[i] = k;
	}

	for (int i = 1;i <= n;++i) {

		while (dl && w[ dq[dl-1] ] <= w[i]) --dl;

		if (dl)
			update(dq[dl-1], w[i] + w[dq[dl-1]]);

		dq[dl++] = i;

		for (auto [l, id] : allq[i])
			res[id] = qry(l) <= req[id];
	}

	for (int i = 0;i < m;++i)
		cout << res[i] << '\n';




}

• Subtask 1: 8 / 8
• Subtask 2: 9 / 9
• Subtask 3: 13 / 13
• Subtask 4: 17 / 17
• Subtask 5: 30 / 30
• Subtask 6: 23 / 23