public class Reduction {
    public static void main(String[] args) {
        long[] a = new long[10_000];
        for (int i = 0; i < 10_000; i++) {
            test1(a);
        }
        for (int i = 0; i < 10_000; i++) {
            test2(a);
        }
        for (int i = 0; i < 10_000; i++) {
            test3(a);
        }
    }

    public static long test1(long[] a) {
        long s = 0;
        for (int i = 0; i < a.length; i++) {
            s = Long.max(s, a[i]);
        }
        return s;
    }

    public static void test2(long[] a) {
        for (int i = 0; i < a.length; i++) {
            a[i] = Long.max(a[i], 0);
        }
    }

    public static long test3(long[] a) {
        long s = 0;
        for (int i = 0; i < a.length; i++) {
            s += a[i];
        }
        return s;
    }
}