Submission #890019

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
890019	2023-12-20T10:55:59 Z	vjudge1	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	13 / 100	3000 ms	172512 KB

sortbooks

//#pragma GCC optimize("Ofast,unroll-loops,fast-math,O3")
//#pragma GCC target( "sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>

#define ordered_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
#define len(x) (int)x.size()
#define ull unsigned long long
#define F first
#define S second
#define pb push_back
#define pf push_front
#define popb pop_back
#define popf pop_front
// #define int long long
#define ld long double
#define pii pair<int,int>
#define mii map<int,int>

using namespace std;
using namespace __gnu_pbds;
using ll = long long;

const int N = 1e6 + 5;

int n,q,a[N],c[N],lg[N],sp[21][N],s[21][N];
vector <int> p[1005];

signed main(){
	// freopen("txt.in", "r", stdin);
	// freopen("txt.out", "w", stdout);
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cin >> n >> q;
	lg[2] = 1;
	for (int i=1;i<=n;i++){
		if (!lg[i]) lg[i] = lg[i-1];
		if (i*2<=n) lg[i*2] = lg[i] + 1;
	}
	int mn = 1e9,mx = 0;
	for (int i=1;i<=n;i++){
		cin >> a[i];
		s[0][i] = a[i];
		mn = min(mn, a[i]);
		mx = max(mx, a[i]);
	}
	if (mx <= 1000){
		for (int i=1;i<=n;i++){
			p[a[i]].pb(i);
		}
	}
	for (int i=1;i<n;i++){
		if (a[i]<=a[i+1]) {
			c[i] = 1;
		}
		sp[0][i] = c[i];
	}
	for (int i=1;i<=20;i++){
		for (int j=1;j+(1<<i)-1<=n;j++){
			sp[i][j] = min(sp[i-1][j], sp[i-1][j+(1<<(i-1))]);
		} 
	}
	for (int i=1;i<=20;i++){
		for (int j=1;j+(1<<i)-1<=n;j++){
			s[i][j] = max(s[i-1][j], s[i-1][j+(1<<(i-1))]);
		} 
	}
	while(q--){
		int ll,rr,k;
		cin >> ll >> rr >> k;
		if (ll==rr){
			cout << 1 << '\n';
			continue;
		}
		int l = ll;
		int r = rr-1;
		while(l<=r){
			int md = (l + r) / 2;
			int x = lg[(rr-1)-md+1];
			int cur = min(sp[x][md], sp[x][(rr-1)-(1<<x)+1]);
			if (cur==1){
				r = md - 1;
			}
			else{
				l = md + 1;
			}
		}
		if (ll==l){
			cout << 1 << '\n';
			continue;
		}
		if (k < mn){
			cout << 0 << '\n';
			continue;
		}
		if (mx <= 1000){
			int res = 0;
			for (int i=1;i<=mx;i++){
				l = 0;
				r = len(p[i]) - 1;
				while(l<=r){
					int md = (l + r) / 2;
					if (p[i][md] < ll){
						l = md + 1;
					}
					else{
						r = md - 1;
					}
				}
				if (l<len(p[i]) && p[i][l]>=ll && p[i][l]<=rr){
					int x = lg[p[i][l] - ll + 1];
					int cur = max(s[x][ll], s[x][p[i][l]-(1<<x)+1]);
					if (cur > i) res = max(res, cur + i);
				}
			}
			if (res <= k){
				cout << 1 << '\n';
			}
			else{
				cout << 0 << '\n';
			}
		}
		else{
			int res = 0;
			for (int i=ll+1;i<=rr;i++){
				int x = lg[i-ll+1];
				int cur = max(s[x][ll], s[x][i-(1<<x)+1]);
				if (cur > a[i]){
					res = max(res, cur + a[i]);
				}
			}
			cout << res << '\n';
			if (res<=k){
				cout << 1 << '\n';
			}
			else{
				cout << 0 << '\n';
			}
		}
	}
}

//order_of_key(k): Number of items strictly smaller than k .
//find_by_order(k): K-th element in a set (counting from zero).

//sum of squares n*(n+1)*(2n+1)/6
//sum of cubes [n*(n+1)/2]^2
//sum of squares for odds n*(4*n*n-1)/3
//sum of cubes for odds n*n*(2*n*n-1)

//a/b%mod = a*(b^(m-2)%mod)
//(a>>x)&1 == 0
//a^b = (a+b)-2(a&b)

//srand(time(0))-always changing

Subtask #1
0 / 8.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	16732 KB	Output is correct
2	Correct	1 ms	4444 KB	Output is correct
3	Incorrect	4 ms	35300 KB	Output isn't correct
4	Halted	0 ms	0 KB	-

Subtask #2
0 / 9.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	16732 KB	Output is correct
2	Correct	1 ms	4444 KB	Output is correct
3	Incorrect	4 ms	35300 KB	Output isn't correct
4	Halted	0 ms	0 KB	-

Subtask #3
13.0 / 13.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	928 ms	172224 KB	Output is correct
2	Correct	932 ms	172216 KB	Output is correct
3	Correct	939 ms	172512 KB	Output is correct
4	Correct	916 ms	172260 KB	Output is correct
5	Correct	686 ms	172200 KB	Output is correct