Submission #427899

#	Time	Username	Problem	Language	Result	Execution time	Memory
427899		lakshith_	Carnival Tickets (IOI20_tickets)	C++14	27 / 100	692 ms	53920 KiB

tickets

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

#define ll long long 
#define int 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;
}

struct node{
	int n;
	int MIN;
	int MAX;
	int minI;
	int maxI;
	bool what;
};

bool compare(node a,node b){
	return a.MIN+a.MAX < b.MIN+b.MAX;
}

long long find_maximum(signed k, std::vector<std::vector<signed>> x) {
	int n = x.size();
	int m = x[0].size();
	assert(k==1);
	int r = 0;
	vector<node> vec; 
	
	for(int i=0;i<n;i++){
		int MAX = -1,maxI=0;
		for(int j=0;j<m;j++)
			if(MAX<x[i][j])MAX=x[i][j],maxI=j;
		int MIN = INT_MAX,minI=0;
		for(int j=0;j<m;j++)
			if(MIN>x[i][j])MIN=x[i][j],minI=j;
		//cout << minI << " " << maxI << "\n";
		vec.push_back((node){i,MIN,MAX,minI,maxI,true});
		r+=MAX;
	}
	
	sort(vec.begin(),vec.end(),compare);
	for(int i=0;i<n/2;i++){
		r-=vec[i].MIN+vec[i].MAX;
		vec[i].what=false;
	}
	
	//assert(vec.size()==n);
	vector<vector<signed>> ans;
	for(int i=0;i<n;i++)
		ans.push_back(vector<signed>(m));
		
	for(int i=0;i<n;i++)
		for(int j=0;j<m;j++)
			ans[i][j] = -1;
			
	for(int i=0;i<n;i++)
		if(vec[i].what)ans[vec[i].n][vec[i].maxI]=0;
		else ans[vec[i].n][vec[i].minI]=0;
	allocate_tickets(ans);
	return r; 
}

• Subtask 1: 11 / 11
• Subtask 2: 16 / 16
• Subtask 3: 0 / 14
• Subtask 4: 0 / 14
• Subtask 5: 0 / 12
• Subtask 6: 0 / 23
• Subtask 7: 0 / 10