제출 #644003

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
644003		ymm	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	64 / 100	502 ms	262144 KiB

sortbooks

#include <bits/stdc++.h>
#define Loop(x,l,r) for (ll x = (l); x < (r); ++x)
#define LoopR(x,l,r) for (ll x = (r)-1; x >= (l); --x)
typedef long long ll;
typedef std::pair<int, int> pii;
typedef std::pair<ll , ll > pll;
using namespace std;

const int N = 1'000'010;

struct node {
	vector<ll> srt;
	ll mxs;
} seg[N<<2];
ll a[N];
int n;

void build(int i=0, int b=0, int e=n)
{
	if (e-b == 1) {
		seg[i].srt = {a[b]};
		seg[i].mxs = 0;
		return;
	}
	build(2*i+1, b, (b+e)/2);
	build(2*i+2, (b+e)/2, e);
	seg[i].mxs = max(seg[2*i+1].mxs, seg[2*i+2].mxs);
	auto it = lower_bound(seg[2*i+2].srt.begin(), seg[2*i+2].srt.end(), seg[2*i+1].srt.back());
	if (it != seg[2*i+2].srt.begin())
		seg[i].mxs = max(seg[i].mxs, seg[2*i+1].srt.back() + *--it);
	seg[i].srt.resize(e-b);
	merge(seg[2*i+1].srt.begin(), seg[2*i+1].srt.end(), seg[2*i+2].srt.begin(), seg[2*i+2].srt.end(), seg[i].srt.begin());
}

pll get(int l, int r, ll pre=0, int i=0, int b=0, int e=n)
{
	if (l <= b && e <= r) {
		ll mxs = seg[i].mxs;
		auto it = lower_bound(seg[i].srt.begin(), seg[i].srt.end(), pre);
		if (it != seg[i].srt.begin())
			mxs = max(mxs, pre + *--it);
		ll mx = max(pre, seg[i].srt.back());
		return {mx, mxs};
	}
	if (r <= b || e <= l)
		return {0, 0};
	auto [pre2, ans1] = get(l, r, pre , 2*i+1, b, (b+e)/2);
	auto [pre3, ans2] = get(l, r, pre2, 2*i+2, (b+e)/2, e);
	return {pre3, max(ans1, ans2)};
}

int main()
{
	cin.tie(0) -> sync_with_stdio(false);
	int q;
	cin >> n >> q;
	Loop (i,0,n)
		cin >> a[i];
	build();
	Loop (i,0,q) {
		int l, r, k;
		cin >> l >> r >> k;
		--l;
		ll mx=0, mxs=0;
		//Loop (i,l,r) {
		//	if (a[i] >= mx)
		//		mx = a[i];
		//	else
		//		mxs = max(a[i]+mx, mxs);
		//}
		int x = get(l, r).second;
		cout << (x <= k) << '\n';
	}
}

컴파일 시 표준 에러 (stderr) 메시지

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:64:6: warning: unused variable 'mx' [-Wunused-variable]
   64 |   ll mx=0, mxs=0;
      |      ^~
sortbooks.cpp:64:12: warning: unused variable 'mxs' [-Wunused-variable]
   64 |   ll mx=0, mxs=0;
      |            ^~~

• Subtask 1: 8 / 8
• Subtask 2: 9 / 9
• Subtask 3: 0 / 13
• Subtask 4: 17 / 17
• Subtask 5: 30 / 30
• Subtask 6: 0 / 23