34WA,求条

#include<iostream>
using namespace std;
int sumway(int a, int b, int c, int d,int e,int f)
{
	if (c == a - 2 && d == b - 1)
		return 0;
	if (c == a - 1 && d == b - 2)
		return 0;
	if (c == a - 2 && d == b + 1)
		return 0;
	if (c == a - 1 && d == b + 2)
		return 0;
	if (c == a + 2 && d == b - 1)
		return 0;
	if (c == a + 1 && d == b - 2)
		return 0;
	if (c == a + 2 && d == b + 1)
		return 0;
	if (c == a + 1 && d == b + 2)
		return 0;
	if (c == a && d == b)
		return 0;
	if (c > e || d > f)
		return 0;
	if (c == e && d == f - 1)
		return 1;
	if (c == e - 1 && d == f)
		return 1;
	return sumway(a, b, c, d + 1, e, f) + sumway(a, b, c + 1, d, e, f);
}
int main()
{
	int horsex, horsey, bx, by;
	int sum = 0;
	int prex = 0; int prey = 0;
	cin >> bx >> by >> horsex >> horsey;
	cout << sumway(horsex, horsey, prex,prey,bx, by);
}