제출 #427743

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
427743		lakshith_	카니발 티켓 (IOI20_tickets)	C++14	11 / 100	2 ms	588 KiB

tickets

#include "tickets.h"
#include <bits/stdc++.h>

#define ll long long 

#define what_is(a) cout << #a << " is " << a << "\n"

using namespace std;

ll diff(int val,vector<int> vec){
	ll r = 0;
	for(int a:vec){
		r += abs(a-val);
		//cout << abs(a-val) << " ";
	}
	//cout << "\n";
	return r;
}

long long find_maximum(int k, std::vector<std::vector<int>> x) {
	int n = x.size();
	int m = x[0].size();
	assert(m==1);
	std::vector<std::vector<int>> answer;
	for (int i = 0; i < n; i++) {
		std::vector<int> row(m,0);
		answer.push_back(row);
	}
	allocate_tickets(answer);
	ll lo =0,hi=1000000000;
	vector<int> vec;
	for(int i=0;i<n;i++)
	vec.push_back(x[i][0]);
	while(lo<hi){
		ll l1 = lo + (hi-lo)/3,l2=hi - (hi-lo)/3;
		ll a = diff(l1,vec),b=diff(l2,vec);
		if(a==b)break;
		if(a<b){
			hi = l2;
		}else{
			lo = l1;
		}
	}
	//what_is(lo);
	//what_is(hi);
	return diff((lo+hi)/2,vec);
}

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