38 lines
823 B
Zig
38 lines
823 B
Zig
|
const std = @import("std");
|
||
|
|
|
||
|
|
pub fn main() !void {
|
||
|
|
const stdin = std.io.getStdIn();
|
||
|
|
var buf_io = std.io.bufferedReader(stdin.reader());
|
||
|
|
var reader = buf_io.reader();
|
||
|
|
|
||
|
|
var buf = [_]u8{0} ** 100000;
|
||
|
|
_ = try reader.readAll(&buf);
|
||
|
|
|
||
|
|
std.debug.print("{}", .{calculate_floor(&buf)});
|
||
|
|
}
|
||
|
|
|
||
|
|
fn calculate_floor(instructions: []const u8) i32 {
|
||
|
|
var current: i32 = 0;
|
||
|
|
var i: i32 = 1;
|
||
|
|
|
||
|
|
for (instructions) |c| {
|
||
|
|
switch (c) {
|
||
|
|
0 => break,
|
||
|
|
'(' => current += 1,
|
||
|
|
')' => current -= 1,
|
||
|
|
else => continue,
|
||
|
|
}
|
||
|
|
if (current < 0) {
|
||
|
|
return i;
|
||
|
|
}
|
||
|
|
i += 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
test "day-tests" {
|
||
|
|
try std.testing.expectEqual(calculate_floor(")"), 1);
|
||
|
|
try std.testing.expectEqual(calculate_floor("()())"), 5);
|
||
|
|
}
|