Submission #306606

#	Time	Username	Problem	Language	Result	Execution time	Memory
306606		syy	Arranging Shoes (IOI19_shoes)	C++17	10 / 100	110 ms	135032 KiB

shoes

//#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define FOR(i, a, b) for(int i = (int)a; i <= (int)b; i++)
#define DEC(i, a, b) for(int i = (int)a; i >= (int)b; i--)
typedef pair<int, int> pi;
typedef pair<pi, int> pii;
typedef pair<pi, pi> pipi;
#define f first
#define s second
typedef vector<int> vi;
typedef vector<pi> vpi;
typedef vector<pii> vpii;
#define pb push_back
#define pf push_front
#define all(v) v.begin(), v.end()
#define disc(v) sort(all(v)); v.resize(unique(all(v)) - v.begin());
#define INF (int) 1e9 + 100
#define LLINF (ll) 1e18
#define fastio ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define sandybridge __attribute__((optimize("Ofast"), target("arch=sandybridge")))
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());    //can be used by calling rng() or shuffle(A, A+n, rng)
inline ll rand(ll x, ll y) { ++y; return (rng() % (y-x)) + x; } //inclusivesss

ll n, ans;
deque<ll> lpos[100005], rpos[100005];

ll count_swaps(vector<int> v) {
	n = v.size()/2;
	FOR(i, 0, 2*n-1) {
		if (v[i] < 0) {
			if (!rpos[-v[i]].empty()) ans += i - rpos[-v[i]].front(), rpos[-v[i]].pop_front();
			else lpos[-v[i]].pb(i);
		} else {
			if (!lpos[v[i]].empty()) ans += i - lpos[v[i]].front() - 1, lpos[v[i]].pop_front();
			else rpos[v[i]].pb(i);
		}
	}
	return ans;
}

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