#include "indexing.h"

void rangePairs(const int from, const int to, int *pairs) {
    int i, j, k;

    for (k = 0, i = from; i < to; ++i) {
       for (j = i + 1; j < to; ++j, k += 2) {
            pairs[k] = i;
            pairs[k + 1] = j;
        }
    }
}