// Sample supplied by Computelab. Replace with your own histogram slot to test it.
// 4096 bins; each input key contributes to keys[i] & 4095.
#include "common.h"
extern "C" void slot_customer(const uint32_t* keys, uint32_t n, uint32_t* hist) {
    for (uint32_t b=0; b<4096; ++b) hist[b]=0;
    for (uint32_t i=0; i<n; ++i) ++hist[keys[i] & 4095];
}