oj.uz

답안 #283543

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
283543 2020-08-25T23:56:42 Z test2 Arranging Shoes (IOI19_shoes) C++14
10 / 100
 1 ms 256 KB 
#include<bits/stdc++.h>
#include "shoes.h"

#define I inline void 


using namespace std ; 

using ll = long long ; 
using ld = long double ; 

const int N = 3000 + 7 , mod = 1e9 + 7 ;

// How interesting!

int n; 


long long count_swaps(std::vector<int> s) {

	map<int,vector<int> > mp ; 

	ll ret = 1e9 ; 

	vector<pair<int,int>> v ; 

	int pos = 0 ; 
	for(auto u : s){
		if(mp[-u].size()){
			v.push_back({mp[-u].back() , pos}) ; 
			mp[-u].pop_back() ; 
		}
		else{
			mp[u].push_back(pos) ; 
		}

		pos ++ ; 
	}
	int n = (int) s.size() ; 
	vector<int> per ; 
	for(int i = 0 ;i < n / 2 ;i ++){
		per.push_back(i) ; 
	}

	for(auto u : v){
		//cout<< u.first <<" " << u.second <<"..\n" ;
	}

	do{
		int k = 0;
		ll ret1 = 0 ; 
		for(int i = 0 ; i < n/2 ;i++){
			pair<int,int> u = v[per[i]] ; 
			int l = u.first , r = u.second ; 
			if(s[l] > s[r])
				swap(l , r) ; 
			ret1+= abs(k - l) ; 
			ret1+= abs((k+1) - r) ; 
			k+= 2; 
		} 
		ret = min(ret , ret1/2) ;

	}
	while(next_permutation(per.begin() , per.end())) ; 


	return ret;
}

Compilation message

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:45:11: warning: variable 'u' set but not used [-Wunused-but-set-variable]
   45 |  for(auto u : v){
      |           ^

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct

Subtask #2
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Incorrect 0 ms 256 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Incorrect 1 ms 256 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Incorrect 1 ms 256 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Incorrect 0 ms 256 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Incorrect 0 ms 256 KB Output isn't correct
5 Halted 0 ms 0 KB -