integer bads, count, max_bads;
file f;
list l;
real s;
text bad_day, worst_day;

f.stdin;

max_bads = count = bads = s = 0;

while (f.list(l, 0) ^ -1) {
    integer i;

    i = 2;
    while (i < 49) {
        if (0 < atoi(l[i])) {
            count += 1;
            s += atof(l[i - 1]);
            if (max_bads < bads) {
                max_bads = bads;
                worst_day = bad_day;
            }
            bads = 0;
        } else {
            if (!bads) {
                bad_day = l[0];
            }
            bads += 1;
        }
        i += 2;
    }
}

o_form("Averaged /d3/ over ~ readings.\n", s / count, count);
o_("Longest bad run ", max_bads, ", started ", worst_day, ".\n");