32 lines
1,018 B
Zig
32 lines
1,018 B
Zig
const std = @import("std");
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pub fn main() !void {
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const stdin = std.io.getStdIn();
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var buf_io = std.io.bufferedReader(stdin.reader());
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var reader = buf_io.reader();
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var buf = [_]u8{0} ** 1024;
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var total: usize = 0;
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while (try reader.readUntilDelimiterOrEof(&buf, '\n')) |line| {
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const trimmed = std.mem.trim(u8, line, "\n\r");
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var it = std.mem.splitScalar(u8, trimmed, 'x');
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const l = try std.fmt.parseInt(u32, it.first(), 10);
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const w = try std.fmt.parseInt(u32, it.next().?, 10);
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const h = try std.fmt.parseInt(u32, it.next().?, 10);
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total += calculate_sqft(l, w, h);
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}
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std.debug.print("{}", .{total});
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}
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fn calculate_sqft(l: u32, w: u32, h: u32) u32 {
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const coverage = 2 * l * w + 2 * w * h + 2 * h * l;
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const paper = @min(l * w, w * h, h * l);
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return coverage + paper;
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}
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test "day-test" {
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try std.testing.expectEqual(calculate_sqft(2, 3, 4), 58);
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try std.testing.expectEqual(calculate_sqft(1, 1, 10), 43);
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}
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