Extract and Modify Field in a 32-bit Register

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

uint32_t update_register(uint32_t reg) {
    // Your logic here
    uint32_t mask = ((reg & (((1U << 5) -  1) << 10)) >> 10);
    mask = (mask < 31) ? (mask + 1) : mask;
    reg = ((reg & ~(((1U << 5) - 1) << 10)));
    return reg | (mask << 10);
}

int main() {
    uint32_t reg;
    scanf("%u", &reg);
    uint32_t updated = update_register(reg);
    printf("%u", updated);
    return 0;
}