int main() {
unsigned int a = 0xFFFFFFFF;
unsigned int b = 0x00000001;

if(a > b) printf("unsigned a > unsigned b\n");
else printf("unsigned a <= unsigned b\n");


if((signed int)a > (signed int)b) printf("signed a > signed b\n");
else printf("signed a <= signed b\n");

return 0;
}

unsigned a > unsigned b
signed a <= signed b