Hi, Which one of the following ways is better to store the non-duplicate numbers?

1- Using sort and unique in std :: vector in C++ like this :

sort(a.begin(), a.end());
a.erase(unique(a.begin(), a.end()), a.end());

2- Using std :: set in C++

I know set's Order is around $$$O(nlogn)$$$ with a little bad coefficients But I don't know what's the order of using vector and unique, So If it is possible tell me which one is faster and better, Thanks :).

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Hi !

I was googling how to debug faster without writing many cerrs and I found out this blog, then I found out that I don't want to write this much code in my default code on my computer then when I wan in tourist's live stream I saw he is using a local include and I want to use something like that, can anybody pls help, Btw I am using sublime text.

#include <bits/stdc++.h>

using namespace std;

void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(long long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}

template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifndef ONLINE_JUDGE
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#define debug(x...)
#endif

I just want to write this part in my code when I am practicing :

#ifndef ONLINE_JUDGE
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#define debug(x...)
#endif