Submission #779474

#	Time	Username	Problem	Language	Result	Execution time	Memory
779474		mindiyak	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1083 ms	139968 KiB

shoes

#include "shoes.h"
#include <vector>
#include <deque>
#include <iostream>

#define pb push_back
#define mp make_pair
#define ll long long

using namespace std;

long long count_swaps(vector<int> s) {

	vector<deque<ll>> arr;
	vector<ll> effected_swap(s.size(),0);
	ll ans  = 0;

	deque<ll> a;
	for(int i=0;i<200003;i++){
		arr.pb(a);
	}
	
	for(int i=0;i<s.size();i++){
		// cout << s[i] << " (" << 100001-s[i] << ") " << arr[100001-s[i]].size();
		if(arr[100001-s[i]].size() != 0){
			// cout << " yes - " << arr[100001-s[i]][0] <<  "  " << (i-arr[100001-s[i]][0]) << " ";
			if(s[i] > 0){
				ans -= 1;
			}
			ans += (i-arr[100001-s[i]][0]-effected_swap[arr[100001-s[i]][0]]);
			for(int j=arr[100001-s[i]][0];j<i;j++){
				effected_swap[j] += 1;
			}
			arr[100001-s[i]].pop_front();
		}else{
			// cout << " no - " << s[i]+100001 << " ";
			arr[s[i]+100001].push_back(i);
		}
		// cout << ans << endl;
	}

	return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:23:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |  for(int i=0;i<s.size();i++){
      |              ~^~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 15
• Subtask 5: 20 / 20
• Subtask 6: 0 / 15