Printing Bitwise NOT operator with hexadecimal format specifier [on hold]

If i'm using m instead of ~m then the code gives me the expected hexadecimal value of 32 but here it's giving ffffffdf as output.

EDIT I know how bitwise ~ NOT operator works. But i'm not understanding this.Could somebody explain this...??

#include<stdio.h>

int main()
{
    unsigned int m = 32;
    printf("%x\n", ~m); //ffffffdf is printed as output

    return 0;
}