Submission #1054098

#	Time	Username	Problem	Language	Result	Execution time	Memory
1054098		NeroZein	Bubble Sort 2 (JOI18_bubblesort2)	C++17	0 / 100	4 ms	1372 KiB

bubblesort2

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

#ifdef Nero
#include "Deb.h"
#else
#define debug(...)
#endif

const int M = 1e5 + 5;

int tree[M];

void upd (int id, int v) {
  id++;
  while (id < M) {
    tree[id] += v;
    id += id & -id;
  }
}

int qry (int id) {
  id++;
  int ret = 0; 
  while (id > 0) {
    ret += tree[id];
    id -= id & -id; 
  }
  return ret; 
}

int count(vector<int> a) {
  int ret = 0;
  int n = (int) a.size();
  vector<int> ord(n);
  iota(ord.begin(), ord.end(), 0);
  sort(ord.begin(), ord.end(), [&](int i, int j) {
    return (a[ord[i]] == a[ord[j]] ? i > j : a[ord[i]] > a[ord[j]]);
  });
  for (int i : ord) {
    ret = max(ret, qry(i));
    upd(i, 1); 
  }
  for (int i = 0; i < n; ++i) {
    upd(i, -1); 
  }
  return ret; 
}

vector<int> countScans(vector<int> a, vector<int> x, vector<int> v) {
  int q = (int) x.size();
  vector<int> ret(q);
  for (int i = 0; i < q; ++i) {
    a[x[i]] = v[i];
    ret[i] = count(a);
  }
  return ret; 
}

//int main() {
  //ios::sync_with_stdio(false);
  //cin.tie(nullptr);
  //int n, q;
  //cin >> n >> q;
  //vector<int> a(n); 
  //for (int i = 0; i < n; ++i) {
    //cin >> a[i];
  //}
  //vector<int> x(q), v(q); 
  //for (int i = 0; i < q; ++i) {
    //cin >> x[i] >> v[i];
  //}
  //vector<int> answers = countscans(a, x, v); 
  //for (int i : answers) {
    //cout << i << '\n';
  //}
  //return 0;
//}

• Subtask 1: 0 / 17
• Subtask 2: 0 / 21
• Subtask 3: 0 / 22
• Subtask 4: 0 / 40