Submission #434240

#	Time	Username	Problem	Language	Result	Execution time	Memory
434240		ioi	Carnival Tickets (IOI20_tickets)	C++14	0 / 100	1 ms	332 KiB

tickets

#include "tickets.h"
#include <vector>
#include<bits/stdc++.h>
using namespace std ;
const int N = 2000 ;

vector<int> arr0[N] , arr1[N] ;

long long find_maximum(int k, std::vector<std::vector<int>> x) {


	int n = x.size() , m = x[0].size();


	vector<vector<int> > ans(n , vector<int> (m , -1));
	//allocate_tickets(ans);
     long long b ;


     for(int i = 0 ; i < n;  i ++){


        for(int j = 0 ; j < m ; j ++){
            if(x[i][j] == 1)arr1[i].push_back(j);
            else arr0[i].push_back(j);


        }

     }
     long long ret = 0 ;

     for(int kk = 0 ; kk < k ;kk++){


        // try 0

        int sum = 0 ;
        bool ok = true ;

        for(int i = 0 ; i < n && ok; i++){
            if(arr0[i].size() == 0)
                ok = false ;


        }

        if(ok){

            for(int i = 0 ; i < n ; i ++)
                 ans[i][arr0[i].back()] = kk , arr0[i].pop_back() ;

            continue ;


        }

        ok = true ;


        for(int i = 0 ; i < n && ok ; i ++){
            if(arr1[i].size() == 0)
                ok = false ;



        }

        if(ok){

            for(int i = 0 ; i < n ; i ++)
                ans[i][arr1[i].back()] = kk , arr1[i].pop_back();
            continue ;

        }

        for(int i = 0 ; i < n ; i ++){

            if(arr0[i].empty())
                sum ++ ;


        }

        int add = min(sum , n - sum);

        ret += add ;


        add = (add == sum ? 0 : 1);



        for(int i = 0 ; i < n ; i ++){

            if(arr0[i].empty()){

                ans[i][arr1[i].back()] = kk ;
                arr1[i].pop_back();


            }
            else {

                ans[i][arr0[i].back()] = kk ;

                arr0[i].pop_back();

            }

        }

     }
    
    allocate_tickets(ans);
    return ret ;



	/*
	int n = x.size();
	int m = x[0].size();
	std::vector<std::vector<int>> answer;
	for (int i = 0; i < n; i++) {
		std::vector<int> row(m);
		for (int j = 0; j < m; j++) {
			if (j < k) {
				row[j] = j;
			} else {
				row[j] = -1;
			}
		}
		answer.push_back(row);
	}
	allocate_tickets(answer);
	return 1;

	*/
}

Compilation message (stderr)

tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:17:16: warning: unused variable 'b' [-Wunused-variable]
   17 |      long long b ;
      |                ^

• 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