TopCoder SRM602: TypoCoderDiv2

色が変わる節目の個数を数える。

public class TypoCoderDiv2 {
    public int count(int[] rating) {
        int ans = 0;
        int current = 500;
        foreach (var r in rating) {
            if (current >= 1200 ^ r >= 1200) ans++;
            current = r;
        }
        return ans;
    }
}