Submission #862687

#	Time	Username	Problem	Language	Result	Execution time	Memory
862687		Cyber_Wolf	Osumnjičeni (COCI21_osumnjiceni)	C++17	110 / 110	693 ms	76924 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define lg long long 
#define mid (lr+hr)/2

const lg N = 2e5+5;

lg l[N], r[N], anc[N][20], n, seg[(N << 3)][2];

void doLazy(lg node, lg lr, lg hr)
{
	if(!seg[node][1])	return;
	seg[node][0] += seg[node][1]*(hr-lr+1);
	if(lr != hr)
	{
		for(int ch = node*2; ch <= node*2+1; ch++)
		{
			seg[ch][1] += seg[node][1];
		}
	}
	seg[node][1] = 0;
}

void upd(lg node, lg lr, lg hr, lg lq, lg hq, lg val)
{
	doLazy(node, lr, hr);
	if(lr > hq || lq > hr)	return;
	if(lq <= lr & hr <= hq)
	{
		seg[node][1] += val;
		doLazy(node, lr, hr);
		return;
	}
	upd(node << 1, lr, mid, lq, hq, val);
	upd(node << 1 | 1, mid+1, hr, lq, hq, val);
	seg[node][0] = seg[node << 1][0]+seg[node << 1 | 1][0];
	return;
}

lg get(lg node, lg lr, lg hr, lg lq, lg hq)
{
	doLazy(node, lr, hr);
	if(lr > hq || lq > hr)	return 0;
	if(lq <= lr && hr <= hq)	return seg[node][0];
	return (get(node << 1, lr, mid, lq, hq)+get(node << 1 | 1, mid+1, hr, lq, hq));
}

int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(NULL);
	cout.tie(NULL);
	lg n;
	cin >> n;
	unordered_map<lg, lg> mp;
	lg id = 1;
	vector<lg> o;
	for(int i = 1; i <= n; i++)
	{
		cin >> l[i] >> r[i];
		o.push_back(l[i]);
		o.push_back(r[i]);
	}
	sort(o.begin(), o.end());
	for(int i = 0; i < o.size(); i++)
	{
		int it = o[i];
		if(i && it == o[i-1])	continue;
		mp[it] = id++;
	}
	for(int i = 1; i <= n; i++)
	{
		l[i] = mp[l[i]];
		r[i] = mp[r[i]];
	}
	lg en = 1;
	for(int i = 1; i <= n; i++)
	{
		while(en <= n)
		{
			if(get(1, 1, 4e5, l[en], r[en]))
			{
				break;
			}
			upd(1, 1, 4e5, l[en], r[en], 1);
			en++;
		}
		anc[i][0] = en-1;
		upd(1, 1, 4e5, l[i], r[i], -1);
	}
	for(int i = n; i >= 1; i--)
	{
		for(int j = 1; j < 19; j++)
		{
			anc[i][j] = anc[anc[i][j-1]+1][j-1];
		}
	}
	lg q;
	cin >> q;
	while(q--)
	{
		lg a, b;
		cin >> a >> b;
		lg ans = 0;
		for(int i = 18; i >= 0 && a <= b; i--)
		{
			if(anc[a][i] <= b && anc[a][i])
			{
				ans += (1ll << i);
				a = anc[a][i]+1;
			}
		}
		if(a <= b)	ans++;
		cout << ans << '\n';
	}
} 

Compilation message (stderr)

Main.cpp: In function 'void upd(long long int, long long int, long long int, long long int, long long int, long long int)':
Main.cpp:30:8: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
   30 |  if(lq <= lr & hr <= hq)
      |     ~~~^~~~~
Main.cpp: In function 'int main()':
Main.cpp:67:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |  for(int i = 0; i < o.size(); i++)
      |                 ~~^~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 50 / 50