Submission #387207

#	Time	Username	Problem	Language	Result	Execution time	Memory
387207		ismoilov	Arranging Shoes (IOI19_shoes)	C++14	0 / 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, c = 0;
	int n = s.size();
	vector <int> v[2*n+1];
	vector <int> a;
	vector <int> vis(n+1, 0), mx(n+1, 0);
	fp(i,0,n){
		//cout << mx[abs(s[i])] << " ";
		if(s[i] < 0){
		v[abs(s[i])+n].pb(i+abs(c) - abs(vis[abs(s[i])]));
			vis[abs(s[i])]--;
			c += mx[abs(s[i])] - abs(vis[abs(s[i])]);
			mx[abs(s[i])] = abs(vis[abs(s[i])]);
		}
		else{
			v[s[i]].pb(i+abs(c)), a.pb(s[i]);
			vis[s[i]]++;
			c += mx[s[i]] - abs(vis[s[i]]);
			mx[abs(s[i])] = abs(vis[abs(s[i])]);
		}
		//cout << vis[abs(s[i])] << " " << s[i] << " " << c << "\n";
	}
	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;
			//cout << it << " " << x << " " << y << "\n";
		}
	}
	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:27:2: note: in expansion of macro 'fp'
   27 |  fp(i,0,n){
      |  ^~

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