Submission #438733

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
438733	2021-06-28T14:29:28 Z	CSQ31	Bubble Sort 2 (JOI18_bubblesort2)	C++17	Compilation error	0 ms	0 KB

bubblesort2

#include "bubblesort2.h"
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define sz(a) (int)(a.size());
typedef pair<int,int> pii;
vector<int>bit(100000);
int n;
void upd(int pos,int val){
	for(int i=pos;i<=n;i+=i&(-i))bit[i]+=val;
}
int query(int pos){
	int res = 0;
	while(pos){
		res+=bit[pos];
		pos-=pos&(-pos);
	}
	return res;
}
vector<int> countScans(vector<int> a,vector<int> x,vector<int>v){
	int q=sz(x);
	n = sz(a);
	vector<int> answer(q);
	for (int j=0;j<q;j++) {
		for(int i=1;i<=n;i++)bit[i] = 0;
		a[x[j]] = v[j];
		for(int i=0;i<n;i++){b[i].fi = a[i];b[i].se = i+1;}
		sort(b.begin(),b.end());
		int mx = 0;
		for(int i=n-1;i>=0;i--){
			mx = max(query(b[i].se),mx);
			upd(b[i].se,1);
		}
		answer[j] = mx;
	}
	return answer;
}

Compilation message

bubblesort2.cpp: In function 'std::vector<int> countScans(std::vector<int>, std::vector<int>, std::vector<int>)':
bubblesort2.cpp:28:24: error: 'b' was not declared in this scope
   28 |   for(int i=0;i<n;i++){b[i].fi = a[i];b[i].se = i+1;}
      |                        ^
bubblesort2.cpp:29:8: error: 'b' was not declared in this scope
   29 |   sort(b.begin(),b.end());
      |        ^