UVA 10055

http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&category=24&problem=996&mosmsg=Submission+received+with+ID+11307262

计算士兵数差值，即大减小，可以用绝对值，也可以先判断大小，再做运算

#include<stdio.h>  
int main()
{
 int a,b,t;
 while(scanf("%d%d",&a,&b)!=EOF)
     {
      if(a>b)
    {
     t=a;
     a=b;
     b=t;
    }
      printf("%d\n",b-a);
     }
 return 0;
}