Nearest-smallest-to-left.cpp

#include <iostream>
using namespace std;

void printPrevSmaller(int arr[], int n)
{
    cout << "_ ";

    for (int i = 1; i < n; i++)
    {
        int j;
        for (j = i - 1; j >= 0; j--)
        {
            if (arr[j] < arr[i])
            {
                cout << arr[j] << " ";
                break;
            }
        }

        if (j == -1)
            cout << "_ ";
    }
}

int main()
{
    int n;
    cin>>n;
    int arr[n];
    for (int i = 0; i < n; i++)
    {
        cin>>arr[i];
    }
    
    printPrevSmaller(arr, n);
    return 0;
}