Codeforces Round #386 (Div. 2), problem: (C) Tram Solution in C/C++

Codeforces Round #386 (Div. 2), problem: (C) Tram Solution in C/C++

#include<stdio.h>
typedef unsigned u;
u x1,x2,s;
u F(u p,u d,u k)
{
	if(k==2)return-1;
	if(!p&&d==-1u)return F(p,-d,k);
	if(p==s&&d==1)return F(p,-d,k);
	if(k==1&&p==x2)++k;
	if(k==0&&p==x1)++k;
	return 1+F(p+d,d,k);
}
int main()
{
	u t1,t2,p,d,a,b;
	scanf("%u%u%u%u%u%u%u",&s,&x1,&x2,&t1,&t2,&p,&d);
	a=F(p,d,0)*t1;
	b=(x1>x2?x1-x2:x2-x1)*t2;
	printf("%u\n",a>b?b:a);
	return 0;
}