Submission #1306184

#	Time	Username	Problem	Language	Result	Execution time	Memory
1306184		muhammad-mutahir	Index (COCI21_index)	C++20	60 / 110	2593 ms	26816 KiB

index

#include <bits/stdc++.h>
using namespace std;

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/detail/standard_policies.hpp>
using namespace __gnu_pbds;


#define print(l) for(auto i:l) cout<<i<<" ";cout<<endl;
#define input(t,l,n) vector<t>l(n);for(int i = 0;i<n;i++)cin>>l[i];
#define int long long
#define pb push_back
// #define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update> 
#define all(l) l.begin(),l.end()
#define pii pair<int,int>
#define fi first
#define se second

const int M = 1e9+7;
const int inf = 1e18;

typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>ordered_set;
typedef tree<pii,null_type,less_equal<pii>,rb_tree_tag,tree_order_statistics_node_update>ordered_multiset;



int bp(int x, int y, int p){
    int res = 1;
    x = x % p;
    while (y > 0) {
 
        if (y & 1)
            res = (res * x) % p;
        y = y >> 1;
        x = (x * x) % p;
    }
    return res;
}


 
int MI(int n, int p){
    return bp(n, p - 2, p);
}
int mul(int x,int y, int p){
    return x * 1ull * y % p;
}
int di(int x,int y, int p){
    return mul(x, MI(y, p), p);
}


int n , m , k , q; 


void er(ordered_multiset &t, pii v){
    int ord = t.order_of_key(v);
    auto it = t.find_by_order(ord);
    t.erase(it);
}
int N = 2e5+5;
int ud = sqrt(N);
bool comp(vector<int>x,vector<int>y){
    if (x[0]/ud<y[0]/ud){
        return 1;
    }
    else if(y[0]/ud<x[0]/ud){
        return 0;
    }
    else{
        if (x[1]<y[1]){
            return 1;
        }
        else{
            return 0;
        }
    }
}

void solve(int testcase_number){
     cin>>n>>q;
     input(int,p,n);
     vector<vector<int>>ord;
     for(int i =0 ;i<q;i++){
     	int l,r;
     	cin>>l>>r;
     	ord.pb({l-1,r-1,i});
     }
     sort(all(ord),comp);
     vector<int>ans(q,0);
     ordered_multiset ms;
     // ms.insert({1,1});
     // for(auto i:ms){
     		// cout<<i.fi<<" "<<i.se<<endl;;
     // }
     // cout<<endl;
     // // ms.erase({1,1});
     // for(auto i:ms){
     		// cout<<i.fi<<" "<<i.se<<endl;;
     	// }
     	// cout<<endl;
     int l = -1;
     int r = -1;
     for(auto i:ord){
     	int tl = i[0];
     	int tr = i[1];
     	if(l == -1){
     		l = tl;
     		r = tl;
     		ms.insert({p[tl],tl});
     	}
     	
     	while(l < tl){
 			er(ms,{p[l],l});
 			// ms.erase({p[l],l});
     		l++;
     	}
     	while(r > tr){
     		er(ms,{p[r],r});
 			// ms.erase({p[r],r});
     		r--;
     	}
     	
     	while(l > tl){
     		l--;
     		ms.insert({p[l],l});
     	}
     	
     	while(r < tr){
     		r++;
     		ms.insert({p[r],r});
     	}
     	
     	// cout<<l<<" "<<r<<" "<<tl<<" "<<tr<<endl;
     	// print(ms)
     	// ms.erase({2ll,1});
     	// for(auto i:ms){
     		// cout<<i.fi<<" "<<i.se<<endl;;
     	// }
     	// cout<<endl;
     	int low = 0;
     	int hi = n+1;
     	while(hi-low > 1){
     		int mid = (hi+low)/2;
     		int grt = ms.size()-ms.order_of_key({mid,-1});
     		if(grt>=mid){
     			low = mid;
     		}
     		else{
     			hi = mid;
     		}
     		
     	}
     	ans[i[2]] = low;
     	
     }
     for(int i:ans){
     	cout<<i<<endl;
     }
     // print(ans);
     
     

     



}


signed main(){
    ios::sync_with_stdio(0);//DO NOT USE IN INTERACTIVE
    cin.tie(0), cout.tie(0);
    cout << fixed<<setprecision(9);

    int t = 1;
    // cin>>t;
    for(int i = 1;i<=t;i++){
        solve(i);
    }

}

• Subtask 1: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 0 / 50