const std = @import("std");

pub fn main() !void {
    // read the input file
    const input = try std.fs.cwd().openFile("input", .{});
    defer input.close();

    var buf_reader = std.io.bufferedReader(input.reader());
    var in_stream = buf_reader.reader();
    var buf: [1024]u8 = undefined;

    var cal : i32 = 0;
    var max_cal : [3]i32 = .{0, 0, 0};

    while (try in_stream.readUntilDelimiterOrEof(&buf, '\n')) |line| {
        for (line) |char| {
            if (!std.ascii.isWhitespace(char)) { // Contains a number
                cal += std.fmt.parseInt(i32, line, 10) catch break;
                break; // else branch not evaluated
            }
        } else { // All characters are whitelines
            for (max_cal) |*max_i| {
                if (cal > max_i.*) {
                    const aux = max_i.*;
                    max_i.* = cal;
                    cal = aux;
                }
            }
            cal = 0;
        }
    }

    var max_total : i32 = 0;
    for (max_cal) |max_i| {
        std.debug.print("Max : {}\n", .{max_i});
        max_total += max_i;
    }

    std.debug.print("Maximum Calories: {}\n", .{max_total});

}