Submission #428917

#	Time	Username	Problem	Language	Result	Execution time	Memory
428917		lakshith_	Carnival Tickets (IOI20_tickets)	C++14	0 / 100	1 ms	204 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;

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;
		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;
	}
	
	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; 
}*/

long long find_maximum(signed k, std::vector<std::vector<signed>> x) {
	int n = x.size();
	int m = x[0].size();
	vector<vector<int>> ones,zeros;
	for(int i=0;i<n;i++){
		vector<int> one,zero;
		for(int j=0;j<m;j++)
			if(x[i][j]==0)zero.push_back(j);
			else one.push_back(i);
		ones.push_back(one);
		zeros.push_back(zero);	
	}
	
	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;
	int r = 0;	
	while(k--){
		int o=0,z=0;
		for(int i=0;i<n;i++){
			if(o<n/2 && ones[i].size()>=zeros[i].size()){
				if(ones[i].size()!=0){
					o++;
					ans[i][ones[i][ones[i].size()-1]]=k;
					ones[i].pop_back();
					r++;
				}else{
					o++;
					ans[i][zeros[i][zeros[i].size()-1]]=k;
					zeros[i].pop_back();
				}
			}else 
			if(z<n/2 && zeros[i].size()>=ones[i].size()){
				if(zeros[i].size()!=0){
					z++;
					ans[i][zeros[i][zeros[i].size()-1]]=k;
					zeros[i].pop_back();
				}else{
					z++;
					ans[i][ones[i][ones[i].size()-1]]=k;
					ones[i].pop_back();
					r--;
				}
			}else if(o<n/2){
				if(ones[i].size()!=0){
					o++;
					ans[i][ones[i][ones[i].size()-1]]=k;
					ones[i].pop_back();
					r++;
				}else{
					o++;
					ans[i][zeros[i][zeros[i].size()-1]]=k;
					zeros[i].pop_back();
				}
			}else if(z<n/2){
				if(zeros[i].size()!=0){
					z++;
					ans[i][zeros[i][zeros[i].size()-1]]=k;
					zeros[i].pop_back();
				}else{
					z++;
					ans[i][ones[i][ones[i].size()-1]]=k;
					ones[i].pop_back();
					r--;
				}
			}	
		}
	}
	allocate_tickets(ans);
	return r;
}

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