32. Rotate Right in a 32-bit Register

#include <stdio.h>
#include <stdint.h>

uint32_t rotate_right(uint32_t reg, uint8_t n) {
    // Your code here
    uint32_t mask = 1;
    for(uint32_t i = 0; i<n-1; ++i)
        mask |= mask<<1;
    uint32_t val = reg & mask;
    reg >>= n;
    mask <<= (32-n);
    reg &= ~(mask);
    reg |= (val<<(32-n));
    return reg;
}

int main() {
    uint32_t reg;
    uint8_t n;
    scanf("%u %hhu", &reg, &n);
    printf("%u", rotate_right(reg, n));
    return 0;
}