const std = @import("std");
const print = std.debug.warn;
// spalf
// mypassword

fn p1() void {
    var i: usize = 0;
    var sum: usize = 0;

    while (i < 1000) : (i += 1) {
        if (i % 3 == 0) {
            sum += i;
        } else if (i % 5 == 0) {
            sum += i;
        }
    }

    std.debug.warn("{}\n", .{sum});
}

fn p2() void {
    const size: usize = 35;
    var array: [size]usize = undefined;
    for (array) |_, i| {
        array[i] = 0;
    }
    array[0] = 1;
    array[1] = 2;

    var i: usize = 2;
    while (i < size) : (i += 1) {
        array[i] = array[i - 1] + array[i - 2];
    }

    i = 0;
    var sum: usize = 0;
    while (array[i] < 4_000_000) : (i += 1) {
        if (array[i] % 2 == 0)
            sum += array[i];
    }

    std.debug.warn("{}\n", .{sum});
}

fn is_prime(k: usize) bool {
    var i: usize = 2;
    var divided: bool = false;
    while (i < k) : (i += 1) {
        if (k % i == 0) {
            divided = true;
            break;
        }
    }
    return !divided;
}

fn p3() void {
    const size: usize = 5000;
    var primes: [size]usize = undefined;

    var i: usize = 1;
    var j: usize = 0;
    while (j < size) : (i += 1) {
        if (is_prime(i)) {
            primes[j] = i;
            j += 1;
        }
    }

    const n: usize = 600851475143;
    //const n: usize = 13195;
    for (primes) |prime| {
        if (n % prime == 0) {
            std.debug.warn("{}\n", .{prime});
        }
    }
}

fn p4() void {
    var i: usize = 0;
    var j: usize = 0;
    var str: [10]u8 = undefined;
    while (i < 100) : (i += 1) {
        j = 0;
        while (j < 100) : (j += 1) {
            //std.fmt.bufPrint(&str, "{}", .{i * j}) catch unreachable;
            //if (std.fmt.bufPrint(&str, "{}", .{i*j})) |ret| {
            //   std.debug.warn("{}\n", .{str});
            //} else | err | {
            //}
            //var str: parseInt(usize, i*j)
        }
    }
}

pub fn main() void {
    //p1();
    //p2();
    //p3();
    p4();
}