1. Set or Clear a Specific Bit in a Register

#include <stdio.h>

int main() {
    int reg, pos, mode;

    
    scanf("%d %d %d", &reg, &pos, &mode);

    if (mode == 1) {
        
        reg = reg | (1 << pos);
    } else if (mode == 0) {
        
        reg = reg & ~(1 << pos);
    }

    
    printf("%d", reg);

    return 0;
}