kiwiyou / namul

competitive programming language

N A M U L

think less, code faster.

Namul is a programming language for competitive programming.

Hello World

A format string is an expression that prints formatted text.

`Hello, World!`;

A + B

Use input statement to define and read into variables.

|i32 A, i32 B|
i32 answer = A + B;
`$answer`;

You don't need variables to store temporary result.

|i32 A, i32 B|
`$`, A + B;

A + B with multiple tests

Repeat blocks T times.

|i32 T|
rep T {
    |i32 A, i32 B|;
    `$\n`, A + B;
}

Leap year calculation

Comparisons can be chained. Format strings are expressions to allow use in conditional operations.

|i32 year|
year % 4 == 0 != year % 100 || year % 400 == 0 ? `1` : `0`;

Greatest Common Divisor

Declarations and assignments matches patterns.

|i32 a, i32 b|
(i32 c, i32 d) = (a, b);
while d != 0 {
    (c, d) = (d, c % d);
}
d = a / c * b;
`$c\n$d`;

Or you can use classic recursive function:

|i32 a, i32 b|
i32 c = gcd(a, b);
i32 d = a / c * b;
`$c\n$d`;

fn gcd(i32 a, i32 b) i32 {
    b == 0 ? a : gcd(b, a % b)
}

Of course, you don't need to define your function before its call.

Others

Read N numbers, count occurrences of v. You can read into slices.

|i32 N|
[i32; 100] A;
|A[0..N], i32 v|
i32 count = 0;
rep i, N {
    count += A[i] == v ? 1 : 0;
}
`$count`;