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Discussion of Problem 1413. Mars Jumper

java AC in the top of ranks
Posted by esbybb 21 Jul 2015 11:37
        InputStream is = System.in;
        byte[]b = new byte[1000_001];
        int L = is.read(b)-1;
        while(b[L]<48 || b[L]>57) L--;
        int i=0;
        double D = Math.sqrt(0.5);
        double x=0;
        double y=0;                        // 1  2  3  4  5  6  7  8  9
        double[] shftx = new double[]{0,-D, 0, D,-1, 0, 1,-D, 0, D};
        double[] shfty = new double[]{0,-D,-1,-D, 0, 0, 0, D, 1, D};
        while(i<=L && b[i]!=48 && b[i]!=0){
            x+=shftx[b[i]-48];
            y+=shfty[b[i]-48];
            i++;
        }
        System.out.println(String.format("%.10f %.10f", x, y));