Submission #387145

#	Time	Username	Problem	Language	Result	Execution time	Memory
387145		ismoilov	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	1 ms	364 KiB

shoes

#include "shoes.h"
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
#define IOS ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).begin(), (x).end()
#define fp(a,i,c) for(int (a) = (i); (a) < (c); (a)++)
#define fpp(a,i,c) for(int (a) = (i); (a) <= (c); (a)++)
#define fv(c) for(int (a) = (1); (a) <= (c); (a)++)
#define fz(c) for(int (a) = (0); (a) < (c); (a)++)
#define fm(a,i,c) for(int (a) = (i); (a) > (c); (a)--)
#define fmm(a,i,c) for(int (a) = (i); (a) >= (c); (a)--)
#define pb push_back
#define in insert
#define ss second
#define ff first

long long count_swaps(vector<int> s) {
	ll ans = 0;
	int n = s.size();
	vector <int> v[2*n+1];
	vector <int> a;
	fp(i,0,n){
		if(s[i] < 0)
			v[-s[i]+n].pb(i);
		else
			v[s[i]].pb(i), a.pb(s[i]);
	}
	for(auto it : a){
		while(!v[it].empty()){
			int x = v[it].back(), y = v[it+n].back();
			v[it].pop_back(), v[it+n].pop_back();
			if(x > y)
				ans += x - y - 1;
			else
				ans += y - x;
		}
	}
	return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:10:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   10 | #define fp(a,i,c) for(int (a) = (i); (a) < (c); (a)++)
      |                           ^
shoes.cpp:26:2: note: in expansion of macro 'fp'
   26 |  fp(i,0,n){
      |  ^~

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