kimiyuki's blog

By kimiyuki, history, 9 months ago, In English

Hi Codeforces!

Today I would like to intoruce my template generator, online-judge-tools/template-generator. This program can analyze problems of competitive programming and generate boilerplate codes including input part, output part, MOD, etc.

For example, for a probelm, my command oj-template prints the following source code. All of input part and output part is already written in main function, and what you need to write is only the solve function.

#include <bits/stdc++.h>
#define REP(i, n) for (int i = 0; (i) < (int)(n); ++ (i))
#define REP3(i, m, n) for (int i = (m); (i) < (int)(n); ++ (i))
#define REP_R(i, n) for (int i = (int)(n) - 1; (i) >= 0; -- (i))
#define REP3R(i, m, n) for (int i = (int)(n) - 1; (i) >= (int)(m); -- (i))
#define ALL(x) ::std::begin(x), ::std::end(x)
using namespace std;

const string YES = "YES";
const string NO = "nO";
bool solve(int n, const vector<int64_t> & a, const vector<int64_t> & b) {
    // TODO: edit here

// generated by online-judge-template-generator v4.4.0 (
int main() {
    constexpr char endl = '\n';
    int n;
    cin >> n;
    vector<int64_t> a(n), b(n);
    REP (i, n) {
        cin >> a[i] >> b[i];
    auto ans = solve(n, a, b);
    cout << (ans ? YES : NO) << endl;
    return 0;

Also this can generates generators for random cases. You can combine the generator with my another tool online-judge-tools/oj and use them for stress tests, i.e. generating many testcases randomly and run tests against them until a hack testcase for your program is found.


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By kimiyuki, history, 3 years ago, In English


I would like to introduce you to my tool kmyk/online-judge-tools. This is a collection of command-line tools to automate routine work on programming contests.

The main features are:

  • download sample cases
  • test your solution locally

This supports Codeforces, AtCoder, HackerRank, CS Academy, etc.

A screencast is here:


Also, there are many sub-features, some of which are:

  • help to test reactive problems
  • generate boilerplates like int N, M; cin >> N >> M;
  • submit to some judges (including TopCoder Marathon Match)

You can find more features on or the --help option.

To install this, just type $ pip3 install online-judge-tools. Enjoy!

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