CODE EXAMPLE FOR CPP

lower bound and upper bound in c++

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

int main(){
    int n;cin>>n;
    vector<int>v;

    for(int i=0;i<n;i++){
        cin>>v[i];
    }
    sort(v.begin(),v.end());


    //lower bound for vector
    auto pointer1 = lower_bound(v.begin(), v.end(), 7);
    cout<<(*pointer1)<<endl;

    //lower bound for array;
    int array[n];
    for(int i=0;i<n;i++){
        cin>>array[i];
    }
    sort(array,array+n);
    //lowerbound
    int *pointer2 = lower_bound(array, array+n, 7);

    //if you want upper bound then just replace lower_bound with upper_bound
}