Starter files - Codeforces

#	User	Rating
1	tourist	3985
2	jiangly	3885
3	jqdai0815	3682
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#	User	Contrib.
1	cry	170
2	Um_nik	162
2	-is-this-fft-	162
4	atcoder_official	160
5	djm03178	157
6	Dominater069	156
7	adamant	154
8	luogu_official	153
9	awoo	152
10	maomao90	150

Most people have starter files. Some people's starter files are hard to understand and long (which is a good thing), and others don't even use them. Mines is quite confusing.

My starter

#include <bits/stdc++.h>

#ifndef ONLINE_JUDGE
#include <sys/resource.h>
#endif

using namespace std;

#define debug(a) cerr << a << endl;
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()  
#define sz(a) a.size()

typedef unsigned u;
typedef long long ll;

void solve()
{
    
}

int main()
{
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    
    #ifndef ONLINE_JUDGE
    ostringstream output;
    streambuf* cout_buffer = cout.rdbuf();
    cout.rdbuf(output.rdbuf());
    #endif

    int t = 1; //cin >> t;
    while (t--) solve();
        
    #ifndef ONLINE_JUDGE
    cout.rdbuf(cout_buffer);
    cout << "***************************" << endl << output.str();
    cerr << "---------------------------" << endl << "Time: " << (float)clock() / CLOCKS_PER_SEC << " secs" << endl;
    struct rusage usage;
    getrusage(RUSAGE_SELF, &usage);
    cerr << "Memory: " << usage.ru_maxrss << " KB" << endl;
    #endif
    
    return 0;
}

Most people use the Codeforces editor (and it's perfect). I use Vim (don't ask why), so unlike VS-Code, I can't just make an input and output file, so I separate the input from the output. The #include <sys/resource.h> library is for memory usage, it's a bit different in Windows, but this is the Linux approach. If there's a way it improve it, can you please tell me?

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