What are the environments for the programming languages?

Your code is compiled with level two optimization (-O2). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.

Most standard library headers are already included automatically for your convenience.

OpenJDK 17 . Java 8 features such as lambda expressions and stream API can be used.

Most standard library headers are already included automatically for your convenience.

Includes Pair class from https://docs.oracle.com/javase/8/javafx/api/javafx/util/Pair.html.

Most libraries are already imported automatically for your convenience, such as array, bisect, collections. If you need more libraries, you can import it yourself.

For Map/TreeMap data structure, you may use sortedcontainers library.

Note that Python 2.7 will not be maintained past 2020. For the latest Python, please choose Python3 instead.

Most libraries are already imported automatically for your convenience, such as array, bisect, collections. If you need more libraries, you can import it yourself.

For Map/TreeMap data structure, you may use sortedcontainers library.

Compiled with gcc 8.2 using the gnu11 standard.

Your code is compiled with level one optimization (-O1). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.

Most standard library headers are already included automatically for your convenience.

For hash table operations, you may use uthash. "uthash.h" is included by default. Below are some examples:

1. Adding an item to a hash.

struct hash_entry {
    int id;            /* we'll use this field as the key */
    char name[10];
    UT_hash_handle hh; /* makes this structure hashable */
};

struct hash_entry *users = NULL;

void add_user(struct hash_entry *s) {
    HASH_ADD_INT(users, id, s);
}

2. Looking up an item in a hash:

struct hash_entry *find_user(int user_id) {
    struct hash_entry *s;
    HASH_FIND_INT(users, &user_id, s);
    return s;
}

3. Deleting an item in a hash:

void delete_user(struct hash_entry *user) {
    HASH_DEL(users, user);  
}

Your code is run with --harmony flag, enabling new ES6 features.

lodash.js library is included by default.

For Priority Queue / Queue data structures, you may use datastructures-js/priority-queue and datastructures-js/queue.

Your code is run with --harmony flag, enabling new ES2020 features.

lodash.js library is included by default.