10469-To Carry or not to Carry

<br /> /* <br /> "To Carry or not to Carry"<br /> Level:2.0<br /> Date:2006/10/14<br /> 技巧:取XOR<br /> %lu 不可寫成%ul唷 <br /> */<br /> #include <stdio.h><br /> main(){<br /> unsigned long n1=0,n2=0;<br /> while(scanf("%lu %lu",&n1,&n2)==2){<br /> printf("%lu\n",n1^n2); <br /> } <br /> }<br />