static class Calc {
        int z1;
        int z3;
        int z7;
        int z9;
        int p1=-1;
        int p2=-1;
        int p3=-1;
        int p4=-1;
        int p5=-1;

        int res;
        public void add(int next) {
            next = next % 10;
            if(p1 >= 0) {
                if(p1==1) z1++;
                if(p1==3) z3++;
                if(p1==7) z7++;
                if(p1==9) z9++;
            }
            p1 = p2;
            p2 = p3;
            p3 = p4;
            p4 = p5;
            p5 = next;
            if(next==1) res+=z1;
            if(next==3) res+=z7;
            if(next==7) res+=z3;
            if(next==9) res+=z9;
        }
        public int res() {
            return res;
        }
    }