finish day3 part 1

day3.jai

@@ -0,0 +1,44 @@
+sample :: #string END
+987654321111111
+811111111111119
+234234234234278
+818181911112111
+END;
+
+main :: () {
+    content := read_entire_file("day3.input");
+    solve_first(content);
+}
+
+solve_first :: (input: string) {
+    total := 0;
+    for line: split(input, "\n") {
+        if line.count == 0 continue;
+        assert(line.count > 1);
+        biggest_first_digit := 0;
+        biggest_first_digit_index := 0;
+        for i: 0..line.count - 2 {
+            char := line[i] - #char "0";
+            if char > biggest_first_digit {
+                biggest_first_digit = char;
+                biggest_first_digit_index = i;
+            }
+        }
+        biggest_second_digit := 0;
+        print("-----\n");
+        for i: biggest_first_digit_index + 1..line.count - 1 {
+            char := line[i] - #char "0";
+            print("%: %\n", i, char);
+            if char > biggest_second_digit {
+                biggest_second_digit = char;
+            }
+        }
+        total += biggest_first_digit * 10 + biggest_second_digit;
+        print("%: %\n", it_index, biggest_first_digit * 10 + biggest_second_digit);
+    }
+    print("%\n", total);
+}
+
+#import "Basic";
+#import "File";
+#import "String";