Submission #1004659

#	Time	Username	Problem	Language	Result	Execution time	Memory
1004659		vjudge1	Rice Hub (IOI11_ricehub)	C++17	100 / 100	12 ms	1628 KiB

ricehub

/*
    
*/
#include "ricehub.h"
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using namespace std;
 
template <class T> using ot = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
 
#define ins insert
#define pb push_back
// #define long long long long long long
#define pii pair<long long, long long>
#define endl '\n'
#define drop(x) cout<<(x)<<endl; return;
#define all(x) x.begin(),x.end()
const long long sze=1e5 +10;
pair<long long,long long> T[sze+10];
const long long inf = INT_MAX;
void upd(long long node,long long v,long long y){
    node++;
    while(node<=sze){
        T[node].first+=v;
        T[node].second+=y;
        node += (node & -node);
    }
}
pair<long long,long long> qry(long long node){
    node++;
    pair<long long,long long> res;
    while(node>0){
        res.first+=T[node].first;
        res.second += T[node].second;
        node -= (node & -node);
    }
    return res;
}
int besthub(int n, int mxL, int arr[], long long B){
    long long ans=1;
    /*
 
        her i ucun ele j tapaqki :
            j<i
            j ni goturmesek i+1 right terefden nese ekstra goture bilirik
    */
 
 
    long long l =1;
    long long r = n;
    vector<long long> pref(n+1,0);
    for(long long i=0;i<n;i++){
        pref[i]+=arr[i];
        if(i){
            pref[i]+=pref[i-1];
        }
    }
 
    auto calc = [&](long long lx,long long rx,long long orta){
        return  arr[orta]*(orta-lx) - (orta?pref[orta-1] - (lx?pref[lx - 1]:0):0) + 
                pref[rx] - pref[orta] - arr[orta]*(rx-orta);
    };
 
    while(l<=r){
        long long mid = (l+r)/2;
        bool check=false;
 
        long long x = mid%2 ;
        for(long long i =0;i<=n-mid;i++){
            long long c =0;
            long long lx = i;
            long long rx = i+mid-1;
            long long orta = (lx+rx)/2;
            c = calc(lx,rx,orta);
            if(c<=B){
                check=true;
                break;
            }
 
        }
        if(check){
            ans=max(ans,mid);
            l=mid+1;
        }
        else{
            r=mid-1;
        }
    }
 
    return ans;
}

Compilation message (stderr)

ricehub.cpp: In function 'int besthub(int, int, int*, long long int)':
ricehub.cpp:69:19: warning: unused variable 'x' [-Wunused-variable]
   69 |         long long x = mid%2 ;
      |                   ^

• Subtask 1: 17 / 17
• Subtask 2: 25 / 25
• Subtask 3: 26 / 26
• Subtask 4: 32 / 32