import appearance from "./appearance";
import {sum} from "./ascending";
export default function(series) {
var n = series.length,
i,
j,
sums = series.map(sum),
order = appearance(series),
top = 0,
bottom = 0,
tops = [],
bottoms = [];
for (i = 0; i < n; ++i) {
j = order[i];
if (top < bottom) {
top += sums[j];
tops.push(j);
} else {
bottom += sums[j];
bottoms.push(j);
}
}
return bottoms.reverse().concat(tops);
}