Submission #480780

#	Time	Username	Problem	Language	Result	Execution time	Memory
480780		duchung	medians (balkan11_medians)	C++17	100 / 100	48 ms	2564 KiB

medians

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

const int N = 2e5 + 5;

int n;
int bit[N];
bool used[N];

void update(int idx , int val)
{
    for (idx ; idx <= 2 * n - 1 ; idx += idx & -idx) bit[idx] += 1;
}

int get(int idx)
{
    int ret = 0;
    for (idx ; idx >= 1 ; idx -= idx & -idx) ret += bit[idx];
    return ret;
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin >> n;
    int pt1 = 1 , pt2 = 2 * n - 1;
    for (int sz = 1 ; sz <= 2 * n - 1 ; sz += 2)
    {
        int tmp;
        cin >> tmp;

        if (!used[tmp])
        {
            used[tmp] = true;
            update(tmp , 1);
            cout << tmp << " ";
        }

        while(get(tmp - 1) < sz / 2)
        {
            while(used[pt1]) ++pt1;
            used[pt1] = true;
            update(pt1 , 1);
            cout << pt1 << " ";
        }

        while(get(2 * n - 1) - get(tmp) < sz / 2)
        {
            while(used[pt2]) --pt2;
            used[pt2] = true;
            update(pt2 , 1);
            cout << pt2 << " ";
        }


    }

}

Compilation message (stderr)

medians.cpp: In function 'void update(int, int)':
medians.cpp:12:10: warning: statement has no effect [-Wunused-value]
   12 |     for (idx ; idx <= 2 * n - 1 ; idx += idx & -idx) bit[idx] += 1;
      |          ^~~
medians.cpp: In function 'int get(int)':
medians.cpp:18:10: warning: statement has no effect [-Wunused-value]
   18 |     for (idx ; idx >= 1 ; idx -= idx & -idx) ret += bit[idx];
      |          ^~~

• Subtask 1: 65 / 65
• Subtask 2: 35 / 35