#include <stddef.h>

void *memcpy(void *dst, const void *src, size_t n)
{
    unsigned char *d = dst;
    const unsigned char *s = src;

    for (size_t i = 0; i < n; ++i) {
        d[i] = s[i];
    }

    return dst;
}

void *memset(void *dst, int c, size_t n)
{
    unsigned char *d = dst;

    for (size_t i = 0; i < n; ++i) {
        d[i] = (unsigned char)c;
    }

    return dst;
}