Submission #813156

#	Time	Username	Problem	Language	Result	Execution time	Memory
813156		SlavicG	Bubble Sort 2 (JOI18_bubblesort2)	C++17	38 / 100	1174 ms	118564 KiB

bubblesort2

#include "bubblesort2.h"
#include <bits/stdc++.h>
using namespace std;

#define ll int64_t

const ll inf = 1e10;
const int N = 4e6 + 5;
ll t[4 * N], lazy[4 * N];
void push(int i, int l, int r) {
	if(!lazy[i]) return;
	t[i] += lazy[i];
	if(l != r) {
		lazy[2 * i] += lazy[i];
		lazy[2 * i + 1] += lazy[i];
	}
	lazy[i] = 0;
}
void modif(int i, int l, int r, int tl, int tr, ll val) {
	push(i, l, r);
	if(l > tr || r < tl) return;
	if(l >= tl && r <= tr) {
		lazy[i] += val;
		push(i, l,r);
		return;
	}
	int mid = l + r >> 1;
	modif(2 * i, l, mid, tl, tr, val);
	modif(2 * i + 1, mid + 1, r, tl, tr, val);
	t[i] = max(t[2 * i], t[2 * i + 1]);
}
std::vector<int> countScans(vector<int> a, vector<int> X, vector<int> V){
	int n = a.size();
	int q = X.size();
	vector<int> ans(q);
	vector<int> cnt(n, 0);
	vector<ll> c(n);
	vector<ll> vals;
	//compresam coordonatele si ne asiguram sa nu avem duplicate
	for(int i = 0; i < n; ++i) {
		vals.push_back(inf * (ll)a[i] + i); 
	}
	for(int k = 0; k < q; ++k) {
		int i = X[k];
		ll newval = inf * V[k] + i;
		vals.push_back(newval);
	}
	sort(vals.begin(), vals.end());
	vals.erase(unique(vals.begin(), vals.end()), vals.end());
	for(int i = 0; i < n; ++i) {
		a[i] = lower_bound(vals.begin(), vals.end(), (ll)a[i] * (ll)inf + i) - vals.begin();
	}
	for(int k = 0; k < q; ++k) {
		int i = X[k];
		ll newval = inf * V[k] + i;
		V[k] = lower_bound(vals.begin(), vals.end(), newval) - vals.begin();
	}


	//acum rezolvam problema dupa ce am compresat tot
	for(int i = 0; i < N; ++i) modif(1, 0, N - 1, i, i, -inf);

	for(int i = 0; i < n; ++i) {
		modif(1, 0, N - 1, a[i], a[i], inf + i);
	}
	for(int i = 0; i < n; ++i) {
		modif(1, 0, N - 1, a[i] + 1, N - 1, -1);
	}
	for(int k = 0; k < q; ++k) {
		int i = X[k], newval = V[k];
		modif(1, 0, N - 1, a[i] + 1, N - 1, +1);
		modif(1, 0, N - 1, a[i], a[i], -2 * inf - i);
		a[i] = newval;
		modif(1, 0, N - 1, a[i], a[i], inf + i);
		modif(1, 0, N - 1, a[i] + 1, N - 1, -1);
		ans[k] = t[1]; 
	}


	return ans;
}
/*
4 2
1 2 3 4
0 3
2 1
*/

Compilation message (stderr)

bubblesort2.cpp: In function 'void modif(int, int, int, int, int, int64_t)':
bubblesort2.cpp:27:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   27 |  int mid = l + r >> 1;
      |            ~~^~~

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