fn start_main() -> i64 {
    var xs: list<i64> = [1, 2];
    append(xs, 3);
    if (length(xs) not match 3) { return 1; }
    var copy: list<i64> = xs;
    copy[0] = 9;
    if (xs[0] not match 1) { return 2; }
    if (copy[0] not match 9) { return 3; }
    append(xs, xs[0]);
    if (length(xs) not match 4) { return 4; }
    if (xs[3] not match 1) { return 5; }
    var nested: list<list<i64>> = [[1], [2]];
    let nested_copy: list<list<i64>> = nested;
    nested[0][0] = 7;
    if (nested_copy[0][0] not match 1) { return 6; }
    if (nested[0][0] not match 7) { return 7; }
    var grown: list<i64> = [];
    var k = 0;
    while (k < 32) { append(grown, k * 2); k = k + 1; }
    if (length(grown) not match 32) { return 8; }
    if (grown[31] not match 62) { return 9; }
    grown[0] = grown[31];
    if (grown[0] not match 62) { return 10; }
    var bytes: list<u8> = [0, 255];
    var byte_copy: list<u8> = bytes;
    byte_copy[0] = 255;
    if (bytes[0] not match 0 or byte_copy[0] not match 255) { return 11; }
    var fractions: list<f64> = [0.5];
    fractions[0] = 1.5;
    if (fractions[0] not match 1.5) { return 12; }
    print("32");
    return 0;
}