Submission #769332

#	Time	Username	Problem	Language	Result	Execution time	Memory
769332		Dan4Life	Bubble Sort 2 (JOI18_bubblesort2)	C++17	0 / 100	9007 ms	5212 KiB

bubblesort2

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using namespace std;
#define pb push_back
using vi = vector<int>;
#define sz(a) (int)a.size()
#define all(a) begin(a),end(a)
const int mxN = (int)1e2+10;
template<class T> using Tree = tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
Tree<int> S[mxN];

vi countScans(vi A, vi X, vi V){
    int q = sz(X), n = sz(A); vi ans, a(all(A));
	for(int i = 0; i < n; i++) S[a[i]].insert(i);
    for(int _ = 0; _ < q; _++){
		S[a[X[_]]].erase(X[_]);
        a[X[_]] = V[_]; 
		S[a[X[_]]].insert(X[_]);
        int tot = 0;
		for(int i = 1; i < mxN; i++){
			if(S[i].empty()) continue;
			int sum = 0; int p = *(--S[i].end());
			for(int j = i+1; j < mxN; j++){
				if(S[j].empty()) continue;
				sum+=S[j].order_of_key(p);
			}
			auto itr = *(--S[i].end());
			tot = max(tot, sum);
		}
        ans.pb(tot);
    }
	return ans;
}

Compilation message (stderr)

bubblesort2.cpp: In function 'vi countScans(vi, vi, vi)':
bubblesort2.cpp:28:9: warning: unused variable 'itr' [-Wunused-variable]
   28 |    auto itr = *(--S[i].end());
      |         ^~~

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