제출 #211294

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
211294		SorahISA	Arranging Shoes (IOI19_shoes)	C++17	25 / 100	215 ms	17784 KiB

shoes

#include "shoes.h"

// #pragma GCC target("avx2")
#pragma GCC optimize("O3", "unroll-loops")

// #include <bits/extc++.h>
// using namespace __gnu_pbds;

#include <bits/stdc++.h>
using namespace std;

#define int long long
// template <typename T>
// using pbds_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
using pii = pair<int, int>;
template<typename T>
using prior = priority_queue<T, vector<T>, greater<T>>;
template<typename T>
using Prior = priority_queue<T>;

#define X first
#define Y second
#define eb emplace_back
#define pb push_back

#define fastIO() ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
#define RANDOM() random_device __rd; \
                 mt19937 __gen = mt19937(__rd()); \
                 uniform_int_distribution<int> __dis(0, 1); \
                 auto rnd = bind(__dis, __gen);

const int INF = 1E18;
const int mod = 1E9 + 7;
const int maxn = 1 << 18;

vector<int> BIT(maxn, 0);

void Add(int idx) {while (idx < maxn) ++BIT[idx], idx += idx&-idx;}

int Sum(int idx, int ans = 0) {while (idx) ans += BIT[idx], idx -= idx&-idx; return ans;}

int count_swaps(vector<int32_t> S) {
    int n = S.size() / 2, ans = 0;
    map<int, int> lastPlace;
    
    for (int i = 0; i < 2*n; ++i) {
        if (lastPlace[-S[i]]) {
            Add(lastPlace[-S[i]]), Add(i+1), ans += i - Sum(i);
            // printf("added: %d\n", i - Sum(i));
            lastPlace.erase(lastPlace[-S[i]]);
        }
        else {
            if (S[i] > 0) ++ans;
            lastPlace[S[i]] = i + 1;
        }
    }
    
    return ans;
}

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