Submission #1277552

#	Time	Username	Problem	Language	Result	Execution time	Memory
1277552		quanduongxuan12	Rice Hub (IOI11_ricehub)	C++20	100 / 100	8 ms	1904 KiB

ricehub

#include "ricehub.h"
#include <bits/stdc++.h>
using namespace std;
#define name "ricehub"
#define MAXN 100005
#define pb push_back
#define pf push_front
#define ll long long
#define ii pair<int, int>
#define fs first
#define sc second
#define ill pair<int, ll>
#define lli pair<ll, int>
#define llll pair<ll, ll>
#define all(v) v.begin(),v.end()
#define uni(v) v.erase(unique(all(v)),v.end())
#define bit(n,i) (((n)>>(i))&1)
#define FOR(i,a,b) for (int i=(a),_b=(b); i<=_b; i++)
#define FORD(i,a,b) for (int i=(a),_b=(b); i>=_b; i--)
#define MASK(i) (1LL<<(i))
const int INF=1e9;
const int MOD=1e9+7;
void add(int &u, int v){
    u+=v;
    if (u>=MOD) u-=MOD;
}
void sub(int &u, int v){
    u-=v;
    if (u<0) u+=MOD;
}
void minimize(int &u, int v){
    u=min(u,v);
}
void maximize(int &u, int v){
    u=max(u,v);
}
long long Rand(long long l, long long r){
    ll tmp=0;
    FOR(i,1,4) tmp=((tmp<<15)^(((1<<15)-1)&rand()));
    return l+tmp%(r-l+1);
}
int n,LIM,a[MAXN];
ll b;
ll pre[MAXN];
ll get(int l, int r){
    return pre[r]-pre[l-1];
}
bool check(int d){
    FOR(i,1,n-d+1){
        int l=i,r=i+d-1;
        int mid=(l+r)/2;
        ll cost=1LL*(mid-l+1)*a[mid]-get(l,mid)-1LL*a[mid]*(r-mid)+get(mid+1,r);
        if (cost<=b) return 1;
    }
    return 0;
}
int solve(){
    FOR(i,1,n) pre[i]=pre[i-1]+1LL*a[i];
    int l=1,r=n,res=-1;
    while (l<=r){
        int mid=(l+r)/2;
        if (check(mid)){
            l=mid+1;
            res=mid;
        }
        else r=mid-1;
    }
    return res;
}
int besthub(int R, int L, int X[], ll B){
    n=R;
    FOR(i,1,n) a[i]=X[i-1];
    b=B;
    LIM=L;
    return solve();
}

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