bound

#include<bits/stdc++.h>
using namespace std;
int main(void)
{
    int ara[] = {1, 3, 5 ,5, 7};
    auto ptr = lower_bound(ara, ara+5, 5);
    cout << *ptr << " " << ptr - ara << endl;
    auto qtr = upper_bound(ara, ara+5, 5);
    cout << *qtr << " " << qtr - ara << endl;
    return 0;
}