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Re:有一小子非说他的程序没错,要起诉北大.我觉得他挺可怜的,但我也找不出错.哪位大哥来帮看看.(C语言)In Reply To:Re:有一小子非说他的程序没错,要起诉北大.我觉得他挺可怜的,但我也找不出错.哪位大哥来帮看看.(C语言) Posted by:20054959 at 2007-01-17 07:44:43 (x-y)*(m-n)超出整数范围这我倒没想到.但改后依然是WA.
下面是一个已经AC的程序,它的unsigned long型输出就是%ld.时
间复杂度也是O(n).
#include <stdio.h>
void main()
{ unsigned long x,y,m,n,L;
scanf("%ld %ld %ld %ld %ld",&x,&y,&m,&n,&L);
if (m==n)
printf("Impossible\n");
else
{
if(m>n)
{m=m-n;
x=(y-x+L)%L;
}
else
{m=n-m;
x=(x-y+L)%L;
}
n=x/m;
x=x%m;
y=x;
while(1)
{if(y==0)
{printf("%ld\n",n);
break;
}
n=n+(y+L)/m;y=(y+L)m;
if(y==x)
{printf("Impossible\n");
break;
}
}
}
}
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