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const std = @import("std");
const aoc = @import("aoc");
pub fn main() !void {
// Initiate allocator
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
defer _ = gpa.deinit();
const alloc = gpa.allocator();
// Read contents from file "./filename"
const cwd = std.fs.cwd();
const fileContents = try cwd.readFileAlloc(alloc, "day1.txt", 20000);
defer alloc.free(fileContents);
// Print file contents
// std.debug.print("{s}", .{fileContents});
var splits = std.mem.splitScalar(u8, fileContents, '\n');
var numZero: i32 = 0;
var current: i32 = 50;
while (splits.next()) |chunk| {
if (chunk.len < 1) {
continue;
}
// std.debug.print("{s}\n", .{chunk[1..]});
const value = try std.fmt.parseInt(i32, chunk[1..], 10);
const d = @divTrunc(value, 100);
const r = @rem(value, 100);
std.debug.print("old_current:{} value:{s} d:{}, r:{} | ", .{ current, chunk, d, r });
if (chunk[0] == 'L') {
if (r > 0 and current - r < 0 and current != 0) {
numZero += 1;
}
current = @mod(current - value, 100);
} else {
if (r > 0 and r + current > 100) {
numZero += 1;
}
current = @mod(current + value, 100);
}
numZero += d;
if (current == 0) {
numZero += 1;
}
std.debug.print("current:{} numZero:{}\n", .{ current, numZero });
}
// Prints to stderr, ignoring potential errors.
std.debug.print("{}\n", .{numZero});
try aoc.bufferedPrint();
}
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