1811C - Restore the Array - CodeForces Solution

#include<bits/stdc++.h>
using namespace std;
#define ll long long int

void solve(){

    ll n;
    cin>>n;

    vector<int> v(n-1);

    for(ll i=0;i<n-1;i++){
        cin>>v[i];
    }
    cout<<v[0]<<" ";
    for(ll i=0;i<n-2;i++){
        cout<<min(v[i],v[i+1])<<" ";
    }cout<<v[n-2]<<endl;

}

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

    ll t; 
    cin >> t;
    while(t--){
        solve();
    }
    return 0;
}