Submission #1193135

#	Time	Username	Problem	Language	Result	Execution time	Memory
1193135		nuutsnoynton	Rice Hub (IOI11_ricehub)	C++20	68 / 100	1095 ms	1348 KiB

ricehub

#include<bits/stdc++.h>
#include "ricehub.h"
using ll = long long;

using namespace std;
ll pre_sum[100002];

ll range_sum(ll lo, ll hi) {
	if ( lo == 0) return pre_sum[hi];
	return pre_sum[hi] - pre_sum[lo - 1];
}

int besthub(int R, int L, int X[], long long B){
	ll lo, hi, mid, Lo, Hi, mid1, lo1, hi1, lo2, hi2, sum;
	for (int i = 0; i < R; i ++) {
		if ( i == 0) pre_sum[i] = X[i];
		else pre_sum[i] = pre_sum[i - 1] + X[i];
	}
	ll s;
	ll max_s = 0;
	for (int i = 0; i < R; i ++) {
		lo = 0;
		hi = R + 1;
		while ( lo < hi) {
			mid = (lo + hi)/2;
			lo1 = 0;
			hi1 = 1e9 + 1;
			
			while ( lo1 < hi1) {
				mid1 = (lo1 + hi1)/2;
				Lo = lower_bound(X, X + R, X[i] - mid1) - X;
				Hi = upper_bound(X, X + R, X[i] + mid1) - X - 1;
				if ( Hi - Lo + 1 < mid) lo1 = mid1 + 1;
				else hi1 = mid1;
			}
			mid1 =lo1;
			Lo = lower_bound(X, X + R, X[i] - mid1) - X;
			Hi = upper_bound(X, X + R, X[i] + mid1) - X - 1;
		//	cout << Hi - Lo + 1 << " " << mid << "" << endl;
		//	cout << mid1 << " " << Lo << " " << Hi << endl;
		//	cout << mid << " " << lo1 << endl;
			sum =0 ;
			lo1 = Lo;
			hi1 = i;
			lo2 = i;
			hi2 = Hi;
			sum = sum + (hi1 - lo1 + 1) * X[i] - range_sum(lo1, hi1);
			sum = sum + range_sum(lo2, hi2) - (hi2 - lo2 + 1) * X[i];
			s = Hi - Lo + 1 - mid;
			s = s * mid1;
			sum = sum - s;
		//	cout << mid << " " << sum << "RRR" << endl;
			if ( sum <= B) lo = mid + 1;
			else hi = mid;
		}
		lo --;
		//cout << lo << "   DONE" << endl;
		max_s = max(max_s, lo);
	}
	
	return max_s;
}

• Subtask 1: 17 / 17
• Subtask 2: 25 / 25
• Subtask 3: 26 / 26
• Subtask 4: 0 / 32