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// java java/ch-1.java
import java.util.List;
public class ch_1 {
static long task1 ( List<Integer> ns ) {
return ns.stream()
.filter(n -> n.toString().length() % 2 == 0)
.count();
}
// Test harness
static int test_number = 1;
static void plan ( Integer count ) { System.out.printf("1..%d\n", count); }
static boolean is ( long got, long expected, String desc ) {
boolean ret = got == expected;
System.out.printf("%s %d - %s\n", (ret ? "ok" : "not ok"), test_number++, desc);
return ret;
}
public static void main(String[] args) {
record Testcase ( int expected, List<Integer> inputs ) {}
List<Testcase> tst = List.of(
new Testcase( 3, List.of( 10, 1, 111, 24, 1000 ) ),
new Testcase( 0, List.of( 111, 1, 11111 ) ),
new Testcase( 1, List.of( 2, 8, 1024, 256 ) )
);
plan(tst.size());
for (Testcase t : tst) {
is( task1(t.inputs), t.expected, t.inputs.toString() );
}
}
}
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