HELLO WORLD!!

Hello World!

....

#include <bits/stdc++.h>

#define INF 0x3f3f3f3f
#define EPS 1e-6
using namespace std;
typedef long long LL;
const int maxn = 1e5 + 10;
int a[maxn];
int T, n;

inline char nc() {
    static char buf[1000000], *p1 = buf, *p2 = buf;
    return p1 == p2 && (p2 = (p1 = buf) + fread(buf, 1, 1000000, stdin), p1 == p2) ? EOF : *p1++;
}
template <typename _Tp> inline void read(_Tp&sum) {
    char ch = nc(); sum = 0;
    while (!(ch >= '0'&&ch <= '9')) ch = nc();
    while (ch >= '0'&&ch <= '9') sum = (sum << 3) + (sum << 1) + (ch - 48), ch = nc();
}

int main()
{
    ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    //freopen("input.txt", "r", stdin);
    cout << "Hello World!!" << endl;
    
    return 0;
}

It's fascinating code