oj.uz

Submission #1052741

# Submission time Handle Problem Language Result Execution time Memory
1052741 2024-08-10T20:10:18 Z Nonoze Fire (BOI24_fire) C++17
100 / 100
 287 ms 91796 KB 
/*
*	Author: Nonoze
*	Created: Monday 06/05/2024
*/
#include <bits/stdc++.h>
using namespace std;

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
template<class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<class T> using ordered_multiset = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long ll;
#define int long long


#ifdef _IN_LOCAL
	#include <bits/DebugTemplate.h>
#else
	#define dbg(...) ;
#endif
#define sz(x) (int)(x.size())
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define pb push_back
#define mp make_pair
#define fi first
#define se second

#define endl '\n'
#define endlfl '\n' << flush
#define quit(x) {cout << x << endl; return;}
#define cmin(a, b) a = min(a, b)
#define cmax(a, b) a = max(a, b)
const int inf = numeric_limits<int>::max() / 4;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int MOD = 1e9+7, LOG=25;



void solve();

signed main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	int tt=1;
	// cin >> tt;
	while(tt--) solve();
	return 0;
}




int n, m, q;
vector<pair<int, int>> a;
vector<int> memo, nxt;
int first=0;

vector<vector<int>> sparce;
vector<int> logs;

void init() {
	vector<int> vec;
	for (int i=0; i<n; i++) vec.pb(a[i].fi);
	logs.clear(), logs.resize(n+1); logs[0]=0, logs[1]=0;
	for (int i=2; i<=n; i++) logs[i]=logs[i/2]+1;
	int lg=logs[n]+1;
	sparce.clear(), sparce.resize(lg, vector<int>(n, inf));
	for (int i=0; i<n; i++) sparce[0][i]=vec[i];
	for (int i=1; i<lg; i++) {
		for (int j=0; j+(1<<i)<=n; j++) {
			sparce[i][j]=min(sparce[i-1][j], sparce[i-1][j+(1<<(i-1))]);
		}
	}
}

int query(int l, int r) {
	int lg=logs[r-l+1];
	return min(sparce[lg][l], sparce[lg][r-(1<<lg)+1]);
}

vector<vector<int>> up;
vector<int> depth;
vector<bool> did;

void dfs(int s) {
	if (s>=n || did[s]) return;
	did[s]=1;
	dfs(nxt[s]);
	up[s][0]=nxt[s];
	depth[s]=depth[nxt[s]]+1;
	for (int i=1; i<LOG; i++) {
		up[s][i]=up[up[s][i-1]][i-1];
	}
}

int kth(int s, int k) {
	for (int i=0; i<LOG; i++) {
		if (k&(1<<i)) s=up[s][i];
	}
	return s;
}

void solve() {
	cin >> n >> m;
	a.clear(), a.resize(n), nxt.resize(n);
	for (auto &u: a) {
		cin >> u.fi >> u.se;
		if (u.se<u.fi) u.se+=m;
	}
	sort(all(a), [&](pair<int, int> &x, pair<int, int> &y) {
		return x.se < y.se;
	});
	init();
	for (int i=n-1; i>=0; i--) {
		int l=i+1, r=n-1, ans=n;
		while (l<=r) {
			int mid=(l+r)/2;
			if (query(mid, r)<=a[i].se) {
				ans=mid;
				l=mid+1;
			} else r=mid-1;
		}
		nxt[i]=ans;
	}
	up.resize(n+1, vector<int>(LOG, n)), did.resize(n, 0), depth.resize(n+1, 0);
	for (int i=0; i<n; i++) dfs(i);
	int ans=inf;
	for (int i=0; i<n; i++) {
		int objective=a[i].fi+m;
		int l=1, r=depth[i]-1, res=inf;
		while (l<=r) {
			int mid=(l+r)/2;
			if (a[kth(i, mid)].se>=objective) {
				res=mid;
				r=mid-1;
			} else l=mid+1;
		}
		cmin(ans, res+1);
	}
	if (ans!=inf) cout << ans << endl;
	else cout << -1 << endl;
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 452 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 452 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 1 ms 600 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 0 ms 344 KB Output is correct
32 Correct 0 ms 468 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 344 KB Output is correct
38 Correct 0 ms 348 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 452 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 1 ms 600 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 0 ms 344 KB Output is correct
32 Correct 0 ms 468 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 344 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 3 ms 2392 KB Output is correct
40 Correct 4 ms 2264 KB Output is correct
41 Correct 4 ms 2392 KB Output is correct
42 Correct 4 ms 2396 KB Output is correct
43 Correct 2 ms 2396 KB Output is correct
44 Correct 5 ms 2468 KB Output is correct
45 Correct 5 ms 2392 KB Output is correct
46 Correct 5 ms 2396 KB Output is correct
47 Correct 3 ms 2396 KB Output is correct
48 Correct 3 ms 2396 KB Output is correct
49 Correct 3 ms 2412 KB Output is correct
50 Correct 3 ms 2136 KB Output is correct

Subtask #4
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 460 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 456 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 3 ms 2396 KB Output is correct
16 Correct 4 ms 2260 KB Output is correct
17 Correct 2 ms 2140 KB Output is correct
18 Correct 5 ms 2392 KB Output is correct
19 Correct 4 ms 2396 KB Output is correct
20 Correct 72 ms 82580 KB Output is correct
21 Correct 131 ms 85616 KB Output is correct
22 Correct 123 ms 85612 KB Output is correct
23 Correct 286 ms 91028 KB Output is correct
24 Correct 235 ms 88580 KB Output is correct
25 Correct 83 ms 85160 KB Output is correct
26 Correct 221 ms 87832 KB Output is correct
27 Correct 275 ms 91796 KB Output is correct
28 Correct 138 ms 85852 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 460 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 3 ms 2396 KB Output is correct
13 Correct 4 ms 2396 KB Output is correct
14 Correct 3 ms 2140 KB Output is correct
15 Correct 65 ms 82520 KB Output is correct
16 Correct 278 ms 91024 KB Output is correct
17 Correct 156 ms 85648 KB Output is correct
18 Correct 111 ms 85596 KB Output is correct
19 Correct 257 ms 89744 KB Output is correct
20 Correct 218 ms 85648 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 452 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 1 ms 600 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 0 ms 344 KB Output is correct
32 Correct 0 ms 468 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 344 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 3 ms 2392 KB Output is correct
40 Correct 4 ms 2264 KB Output is correct
41 Correct 4 ms 2392 KB Output is correct
42 Correct 4 ms 2396 KB Output is correct
43 Correct 2 ms 2396 KB Output is correct
44 Correct 5 ms 2468 KB Output is correct
45 Correct 5 ms 2392 KB Output is correct
46 Correct 5 ms 2396 KB Output is correct
47 Correct 3 ms 2396 KB Output is correct
48 Correct 3 ms 2396 KB Output is correct
49 Correct 3 ms 2412 KB Output is correct
50 Correct 3 ms 2136 KB Output is correct
51 Correct 0 ms 348 KB Output is correct
52 Correct 0 ms 460 KB Output is correct
53 Correct 0 ms 348 KB Output is correct
54 Correct 0 ms 456 KB Output is correct
55 Correct 0 ms 348 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 0 ms 348 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 1 ms 348 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 0 ms 348 KB Output is correct
62 Correct 0 ms 348 KB Output is correct
63 Correct 0 ms 348 KB Output is correct
64 Correct 0 ms 348 KB Output is correct
65 Correct 3 ms 2396 KB Output is correct
66 Correct 4 ms 2260 KB Output is correct
67 Correct 2 ms 2140 KB Output is correct
68 Correct 5 ms 2392 KB Output is correct
69 Correct 4 ms 2396 KB Output is correct
70 Correct 72 ms 82580 KB Output is correct
71 Correct 131 ms 85616 KB Output is correct
72 Correct 123 ms 85612 KB Output is correct
73 Correct 286 ms 91028 KB Output is correct
74 Correct 235 ms 88580 KB Output is correct
75 Correct 83 ms 85160 KB Output is correct
76 Correct 221 ms 87832 KB Output is correct
77 Correct 275 ms 91796 KB Output is correct
78 Correct 138 ms 85852 KB Output is correct
79 Correct 0 ms 344 KB Output is correct
80 Correct 0 ms 348 KB Output is correct
81 Correct 0 ms 348 KB Output is correct
82 Correct 0 ms 344 KB Output is correct
83 Correct 0 ms 348 KB Output is correct
84 Correct 0 ms 348 KB Output is correct
85 Correct 0 ms 348 KB Output is correct
86 Correct 0 ms 348 KB Output is correct
87 Correct 0 ms 348 KB Output is correct
88 Correct 0 ms 460 KB Output is correct
89 Correct 0 ms 348 KB Output is correct
90 Correct 3 ms 2396 KB Output is correct
91 Correct 4 ms 2396 KB Output is correct
92 Correct 3 ms 2140 KB Output is correct
93 Correct 65 ms 82520 KB Output is correct
94 Correct 278 ms 91024 KB Output is correct
95 Correct 156 ms 85648 KB Output is correct
96 Correct 111 ms 85596 KB Output is correct
97 Correct 257 ms 89744 KB Output is correct
98 Correct 218 ms 85648 KB Output is correct
99 Correct 134 ms 85644 KB Output is correct
100 Correct 135 ms 85644 KB Output is correct
101 Correct 287 ms 91024 KB Output is correct
102 Correct 270 ms 90000 KB Output is correct
103 Correct 280 ms 91792 KB Output is correct
104 Correct 157 ms 86224 KB Output is correct
105 Correct 225 ms 87444 KB Output is correct