Soma de Casas - C++

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

typedef long long ll;typedef long double lf;typedef double fl;typedef string str;
typedef vector<int> vi;typedef vector<vector<int>> vvi;typedef vector<fl> vf;typedef vector<ll> vl;
typedef vector<lf> vlf;typedef vector<char> vc;typedef vector<str> vs;typedef pair<int,int> ii;

# define f(i,a,b,c) for(ll i=a;i<b;i+=c)
# define fd(i,a,b,c) for(ll i=a;i>=b;i-=c)
# define ctoi(a) (a-'0')

int ns[100000], n, x, i=0, j;
void au(){
    j = n-1;

    while(i<j){
        if(ns[i]+ns[j] == x){
            cout<<ns[i]<<' '<<ns[j]<<'\n';
            return;
        }
        else if(ns[i]+ns[j]<x)++i;
        else --j;
    }
}
int main(){ ios::sync_with_stdio(0);cin.tie(0);cout.precision(2);cout.setf(ios::fixed);
    cin>>n;
    f(i,0,n,1)cin>>ns[i];
    cin>>x, au();
}