Submission #1075509

#	Time	Username	Problem	Language	Result	Execution time	Memory
1075509		mindiyak	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	93 ms	135024 KiB

shoes

#include "shoes.h"
#include <vector>
#include <deque>
#include <iostream>
#define ll long long
#define F first
#define S second
using namespace std;

long long count_swaps(std::vector<int> s) {
	ll ans = 0;
	ll cnt = 0;

	vector<deque<pair<int,int>>> arr(2e5+10);


	for(int i = 0;i<s.size();i++){
		int left = 0;
		if(s[i] < 0)left = 1;

		// if(left)cerr << "left ";
		// else cerr << "right ";

		cerr << s[i] << " " << arr[-s[i]+1e5].size() << " ";
		if(arr[-s[i]+1e5].size() > 0){
			auto a = arr[-s[i]+1e5][0];
			arr[-s[i]+1e5].pop_front();
			cnt --;
			// cerr << a.F << " " << a.S << " " << cnt << endl;
			ans += i - a.F - (cnt - a.S);
			if(left == 0)ans -= 1;
		}else{
			// cerr << s[i]+1e5 << " " << i << " " << cnt << endl;
			arr[s[i]+1e5].push_back({i,cnt});
			cnt ++;
		}
	}

	
	return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:17:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |  for(int i = 0;i<s.size();i++){
      |                ~^~~~~~~~~

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