Submission #965456

#	Time	Username	Problem	Language	Result	Execution time	Memory
965456		red24	Pilot (NOI19_pilot)	C++14	89 / 100	1042 ms	94112 KiB

pilot

#include <bits/stdc++.h>
using namespace std;
 
#define int long long
#define vi vector<int>
#define pi pair<int, int>
#define vpi vector<pi>
#define vvi vector<vi>
#define mp make_pair
#define pb push_back
#define all(x) x.begin()+1, x.end()
const int INF = (int)1e17;

vi parent, siz;

void create(int x)
{
	parent[x] = x;
	siz[x] = 1;
}

int find(int x)
{
	if (parent[x] == x) return x;
	return parent[x] = find(parent[x]);
}

void unite(int x, int y)
{
	x = find(x);
	y = find(y);

	if (siz[x] < siz[y]) swap(x, y);

	parent[y] = x;
	siz[x] += siz[y];
}

int f(pi x)
{
	return ((x.second-x.first+1)*(x.second-x.first+2))/2;
}

void solve()
{
	int n, q; cin >> n >> q;
	vi a(n+1);
	for (int i = 1; i <= n; i++) cin >> a[i];

	const int mx = (int)1e6+100;
	vi ans(mx+1);
	vvi idx(mx+1);

	for (int i = 1; i <= n; i++)
	{
		idx[a[i]].pb(i);
	}

	int res = 0;

	set<pi> st;
	for (int el = 1; el <= mx; el++)
	{
		for (auto i : idx[el])
		{
			// find next interval
			auto nxt_it = st.upper_bound(mp(i, 0));
			if (nxt_it != st.end())
			{
				// if there is no prev
				if (nxt_it == st.begin())
				{
					if ((*nxt_it).first == i+1)
					{
						pi nxt_replace = mp(i,(*nxt_it).second);
						res -= f(*nxt_it);
						res += f(nxt_replace);
						st.erase(nxt_it);
						st.insert(nxt_replace);
					}
					else
					{
						st.insert(mp(i, i));
						res += 1;
					}
				}
				else
				{
					auto prev_it = prev(nxt_it);
					if ((*nxt_it).first == i+1 && (*prev_it).second == i-1)
					{
						pi nxt_replace = mp((*prev_it).first, (*nxt_it).second);
						res -= f(*nxt_it);
						res -= f(*prev_it);
						res += f(nxt_replace);
						st.erase(nxt_it);
						st.erase(prev_it);
						st.insert(nxt_replace);
					}
					else if ((*nxt_it).first == i+1)
					{
						pi nxt_replace = mp(i, (*nxt_it).second);
						res -= f(*nxt_it);
						res += f(nxt_replace);
						st.erase(nxt_it);
						st.insert(nxt_replace);
					}
					else if ((*prev_it).second == i-1)
					{
						pi nxt_replace = mp((*prev_it).first, i);
						res -= f(*prev_it);
						res += f(nxt_replace);
						st.erase(prev_it);
						st.insert(nxt_replace);
					}
					else
					{
						st.insert(mp(i,i));
						res++;
					}
				}
			}
			else
			{
				if (st.size() == 0)
				{
					st.insert(mp(i,i));
					res++;
					continue;
				}
				auto prev_it = prev(nxt_it);
				if ((*prev_it).second == i-1)
				{
					pi prev_replace = mp((*prev_it).first, i);
					res -= f(*prev_it);
					res += f(prev_replace);
					st.erase(prev_it);
					st.insert(prev_replace);
				}
				else
				{
					st.insert(mp(i,i));
					res++;
				}
			}
		}
		ans[el] = res;
	}
	while (q--)
	{
		int x; cin >> x;
		cout << ans[x] << '\n';
	}
}
 
int32_t main()
{
	auto begin = std::chrono::high_resolution_clock::now();
	// FASTIO
	ios_base::sync_with_stdio(0);
	cin.tie(NULL); cout.tie(NULL);
 
 
 
	int T = 1;
	//cin >> T;
	for (int i = 1; i <= T; i++)
	{
		//cout << "Case #" << i << ": ";
		solve();
	}
	auto end = std::chrono::high_resolution_clock::now();
    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
    cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n"; 
}

• Subtask 1: 3 / 3
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 15 / 15
• Subtask 5: 5 / 5
• Subtask 6: 9 / 9
• Subtask 7: 14 / 14
• Subtask 8: 10 / 10
• Subtask 9: 11 / 11
• Subtask 10: 0 / 11