oj.uz

Submission #838219

# Submission time Handle Problem Language Result Execution time Memory
838219 2023-08-26T10:58:29 Z fatemetmhr Passport (JOI23_passport) C++17
100 / 100
 272 ms 71716 KB 
// na hanooz omidi vjood dare... hanooz ye karayi hast ke bknm :)

#include <bits/stdc++.h>

using namespace std;


#define debug(x) cerr << "(" << (#x) << "): " << (x) << endl;
#define all(x)   (x).begin(), (x).end()
#define fi       first
#define se       second
#define mp       make_pair
#define pb       push_back

typedef long long ll;

const int maxn5 = 2e5 + 10;
const int maxnt = 1e6 + 10;
const int lg    = 20;

int suf[maxn5], pre[maxn5], ans[maxn5];
int l[maxn5], r[maxn5];
bool mark[maxn5], done[maxn5];
int dp[maxn5];
vector <int> adj[maxn5], rt, av[maxn5];

namespace rmq{

	pair <int, int> mn[lg][maxn5];

	void build(int n){
		for(int i = 1; i < lg; i++) for(int j = 0; j + (1 << i) - 1 < n; j++)
			mn[i][j] = min(mn[i - 1][j], mn[i - 1][j + (1 << (i - 1))]);
	}

	pair <int, int> get_min(int l, int r){
		int k = 31 - __builtin_clz(r - l + 1);
		return min(mn[k][l], mn[k][r - (1 << k) + 1]);
	}
}

namespace seg{
	
	pair <int, int> mn[maxnt], mx[maxnt];

	void build(int l, int r, int v){
		if(r - l == 1){
			mn[v] = {::l[l], l};
			mx[v] = {::r[l], l};
			return;
		}
		int mid = (l + r) >> 1;
		build(l, mid, v * 2);
		build(mid, r, v * 2 + 1);
		mn[v] = min(mn[v * 2], mn[v * 2 + 1]);
		mx[v] = max(mx[v * 2], mx[v * 2 + 1]);
	}

	void rem(int l, int r, int id, int v){
		if(r - l == 1){
			mn[v] = {maxn5, l};
			mx[v] = {-1, l};
			return;
		}
		int mid = (l + r) >> 1;
		if(id < mid)
			rem(l, mid, id, v * 2);
		else
			rem(mid, r, id, v * 2 + 1);
		mn[v] = min(mn[v * 2], mn[v * 2 + 1]);
		mx[v] = max(mx[v * 2], mx[v * 2 + 1]);
	}

	pair <int, int> get_max(int l, int r, int lq, int rq, int v){
		if(rq <= l || r <= lq)
			return mp(-1, -1);
		if(lq <= l && r <= rq)
			return mx[v];
		int mid = (l + r) >> 1;
		return max(get_max(l, mid, lq, rq, v * 2), get_max(mid, r, lq, rq, v * 2 + 1));
	}

	pair <int, int> get_min(int l, int r, int lq, int rq, int v){
		if(rq <= l || r <= lq)
			return mp(maxn5, -1);
		if(lq <= l && r <= rq)
			return mn[v];
		int mid = (l + r) >> 1;
		return min(get_min(l, mid, lq, rq, v * 2), get_min(mid, r, lq, rq, v * 2 + 1));
	}
}

void dfs(int v){
	for(auto u : adj[v]){
		dp[u] = min(dp[u], dp[v] + 1);
		dfs(u);
	}
}



int main(){
	ios_base::sync_with_stdio(false); cin.tie(0);

	int n; cin >> n;
	for(int i = 0; i < n; i++){
		cin >> l[i] >> r[i];
		l[i]--; r[i]--;
		rmq::mn[0][i] = {l[i], i};
	}
	rmq::build(n);
	fill(dp, dp + n + 5, maxn5);
	for(int i = 0; i < n; i++){
		int v = rmq::get_min(l[i], r[i]).se;
		if(l[i] == 0)
			dp[i] = 0;
		if(i != v)
			adj[v].pb(i);
		else
			rt.pb(i);
	}
	for(auto u : rt)
		dfs(u);
	for(int i = 0; i < n; i++){
		pre[i] = dp[i];
		adj[i].clear();
	}
	rt.clear();


	for(int i = 0; i < n; i++)
		rmq::mn[0][i] = {-r[i], i};
	rmq::build(n);

	fill(dp, dp + n + 5, maxn5);
	for(int i = 0; i < n; i++){
		int v = rmq::get_min(l[i], r[i]).se;
		if(r[i] == n - 1)
			dp[i] = 0;
		if(i != v)
			adj[v].pb(i);
		else
			rt.pb(i);
	}
	for(auto u : rt)
		dfs(u);
	for(int i = 0; i < n; i++){
		suf[i] = dp[i];
		adj[i].clear();
		ans[i] = min(maxn5, pre[i] + suf[i]);
		if(ans[i] < maxn5)
			av[ans[i]].pb(i);
	}


	seg::build(0, n, 1);

	for(int i = 0; i < maxn5; i++) for(int j = 0; j < int(av[i].size()); j++){
		int v = av[i][j];
		if(done[v])
			continue;
		done[v] = mark[v] = true;
		//debug(v);
		//debug(ans[v]);
		pair <int, int> best;
		while((best = seg::get_max(0, n, 0, v, 1)).fi >= v){
			int u = best.se;
			//debug(u);
			if(!mark[u]){
				mark[u] = true;
				ans[u] = min(ans[u], ans[v] + 1);
				av[ans[u]].pb(u);
			}
			seg::rem(0, n, u, 1);
		}
		while((best = seg::get_min(0, n, v + 1, n, 1)).fi <= v){
			int u = best.se;
			//debug(u);
			if(!mark[u]){
				mark[u] = true;
				ans[u] = min(ans[u], ans[v] + 1);
				av[ans[u]].pb(u);
			}
			seg::rem(0, n, u, 1);
		}
	}

	int q; cin >> q;
	for(int i = 0; i < q; i++){
		int x; cin >> x;
		x--;
		cout << (ans[x] >= maxn5 ? -1 : ans[x] + 1) << '\n';
	}

}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 6 ms 9728 KB Output is correct
4 Correct 212 ms 52488 KB Output is correct
5 Correct 179 ms 55176 KB Output is correct
6 Correct 167 ms 66788 KB Output is correct
7 Correct 136 ms 51016 KB Output is correct
8 Correct 45 ms 42448 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 6 ms 9684 KB Output is correct
7 Correct 6 ms 9684 KB Output is correct
8 Correct 5 ms 9684 KB Output is correct
9 Correct 5 ms 9684 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct
11 Correct 5 ms 9812 KB Output is correct
12 Correct 6 ms 9812 KB Output is correct
13 Correct 5 ms 9812 KB Output is correct
14 Correct 5 ms 9812 KB Output is correct
15 Correct 5 ms 9812 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 6 ms 9684 KB Output is correct
7 Correct 6 ms 9684 KB Output is correct
8 Correct 5 ms 9684 KB Output is correct
9 Correct 5 ms 9684 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct
11 Correct 5 ms 9812 KB Output is correct
12 Correct 6 ms 9812 KB Output is correct
13 Correct 5 ms 9812 KB Output is correct
14 Correct 5 ms 9812 KB Output is correct
15 Correct 5 ms 9812 KB Output is correct
16 Correct 7 ms 10308 KB Output is correct
17 Correct 7 ms 10324 KB Output is correct
18 Correct 8 ms 10324 KB Output is correct
19 Correct 6 ms 10196 KB Output is correct
20 Correct 6 ms 10452 KB Output is correct
21 Correct 6 ms 10324 KB Output is correct
22 Correct 5 ms 10196 KB Output is correct
23 Correct 8 ms 10324 KB Output is correct
24 Correct 8 ms 10196 KB Output is correct

Subtask #4
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 6 ms 9684 KB Output is correct
7 Correct 6 ms 9684 KB Output is correct
8 Correct 5 ms 9684 KB Output is correct
9 Correct 5 ms 9684 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct
11 Correct 5 ms 9812 KB Output is correct
12 Correct 6 ms 9812 KB Output is correct
13 Correct 5 ms 9812 KB Output is correct
14 Correct 5 ms 9812 KB Output is correct
15 Correct 5 ms 9812 KB Output is correct
16 Correct 7 ms 10308 KB Output is correct
17 Correct 7 ms 10324 KB Output is correct
18 Correct 8 ms 10324 KB Output is correct
19 Correct 6 ms 10196 KB Output is correct
20 Correct 6 ms 10452 KB Output is correct
21 Correct 6 ms 10324 KB Output is correct
22 Correct 5 ms 10196 KB Output is correct
23 Correct 8 ms 10324 KB Output is correct
24 Correct 8 ms 10196 KB Output is correct
25 Correct 5 ms 9684 KB Output is correct
26 Correct 6 ms 9684 KB Output is correct
27 Correct 7 ms 10196 KB Output is correct
28 Correct 7 ms 10324 KB Output is correct
29 Correct 6 ms 10388 KB Output is correct
30 Correct 6 ms 10324 KB Output is correct
31 Correct 6 ms 10324 KB Output is correct

Subtask #5
46.0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 6 ms 9728 KB Output is correct
4 Correct 212 ms 52488 KB Output is correct
5 Correct 179 ms 55176 KB Output is correct
6 Correct 167 ms 66788 KB Output is correct
7 Correct 136 ms 51016 KB Output is correct
8 Correct 45 ms 42448 KB Output is correct
9 Correct 5 ms 9684 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct
11 Correct 5 ms 9684 KB Output is correct
12 Correct 5 ms 9684 KB Output is correct
13 Correct 5 ms 9684 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 6 ms 9684 KB Output is correct
16 Correct 5 ms 9684 KB Output is correct
17 Correct 5 ms 9684 KB Output is correct
18 Correct 5 ms 9684 KB Output is correct
19 Correct 5 ms 9812 KB Output is correct
20 Correct 6 ms 9812 KB Output is correct
21 Correct 5 ms 9812 KB Output is correct
22 Correct 5 ms 9812 KB Output is correct
23 Correct 5 ms 9812 KB Output is correct
24 Correct 7 ms 10308 KB Output is correct
25 Correct 7 ms 10324 KB Output is correct
26 Correct 8 ms 10324 KB Output is correct
27 Correct 6 ms 10196 KB Output is correct
28 Correct 6 ms 10452 KB Output is correct
29 Correct 6 ms 10324 KB Output is correct
30 Correct 5 ms 10196 KB Output is correct
31 Correct 8 ms 10324 KB Output is correct
32 Correct 8 ms 10196 KB Output is correct
33 Correct 5 ms 9684 KB Output is correct
34 Correct 6 ms 9684 KB Output is correct
35 Correct 7 ms 10196 KB Output is correct
36 Correct 7 ms 10324 KB Output is correct
37 Correct 6 ms 10388 KB Output is correct
38 Correct 6 ms 10324 KB Output is correct
39 Correct 6 ms 10324 KB Output is correct
40 Correct 272 ms 56684 KB Output is correct
41 Correct 213 ms 60512 KB Output is correct
42 Correct 215 ms 60220 KB Output is correct
43 Correct 191 ms 56964 KB Output is correct
44 Correct 195 ms 71716 KB Output is correct
45 Correct 153 ms 65816 KB Output is correct
46 Correct 67 ms 28396 KB Output is correct
47 Correct 184 ms 58732 KB Output is correct
48 Correct 149 ms 55296 KB Output is correct