Submission #895796

#	Time	Username	Problem	Language	Result	Execution time	Memory
895796		vjudge1	Rice Hub (IOI11_ricehub)	C++17	100 / 100	10 ms	3436 KiB

ricehub

#include <bits/stdc++.h>

using namespace std;

//#define int long long

#define ll long long

bool check(ll mid, vector<ll>& psum, int *x, ll money){
	for(int i = mid; i < (int)psum.size(); i++){
		ll val = x[i - mid/2 - 1];
		val *= (mid - mid/2);
		ll tot = val - (psum[i - mid/2] - psum[i - mid]);
		tot += (psum[i] - psum[i - mid/2]) - (x[i-mid/2 - 1] * (mid/2));
		if(tot <= money){
			return true;
		}
	}
	return false;
}

int besthub(int r, int l, int x[], long long b){
	vector<ll> psum(r+1);
	psum[0] = 0;
	for(int i = 1; i <= r; i++){
		psum[i] = psum[i-1] + x[i-1];
	}
	ll left = 0, right = r, mid;
	while(left < right){
		mid = (left + right + 1)/2;
		if(check(mid, psum, x, b)){
			left = mid;
		}else{
			right = mid-1;
		}
	}
	return left;
}

// signed main(){
// 	ios_base::sync_with_stdio(0); cin.tie(0);
// 	vector<int> v;
// 	v.push_back(1); v.push_back(2); v.push_back(10); v.push_back(12); v.push_back(14);
// 	cout << besthub(5, 20, v, 6);
// }

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