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37 lines
1.0 KiB
37 lines
1.0 KiB
const std = @import("std");
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pub fn main() !void {
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const stdout = std.io.getStdOut().writer();
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const raw_in = std.io.getStdIn();
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var buffered_reader = std.io.bufferedReader(raw_in.reader());
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var reader = buffered_reader.reader();
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var result: u32 = 0;
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var line_buffer: [1000]u8 = undefined;
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while (try reader.readUntilDelimiterOrEof(&line_buffer, '\n')) |line| {
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var firstDigit: u8 = 0;
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var lastDigit: u8 = 0;
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for (0..line.len) |i| {
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const char = line[i];
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if (char >= '0' and char <= '9') {
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firstDigit = char - '0';
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break;
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}
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}
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for (0..line.len) |i| {
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const index = line.len - i - 1;
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const char = line[index];
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if (char >= '0' and char <= '9') {
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lastDigit = char - '0';
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break;
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}
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}
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result += firstDigit * 10 + lastDigit;
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}
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try stdout.print(
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"{d}\n",
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.{result},
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);
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}
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