#有点小问题

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<math.h>
int judge(int i, int j, int p3, int p4);
int main()
{
	int i, j, x, y;
	int p1, p2, p3, p4;
	int position[20][20];
	scanf("%d%d%d%d", &p1, &p2, &p3, &p4);
	for (i = 0; i <= p1; i++)
	{
		for (j = 0; j <= p2; j++)
		{
			if (judge(i, j, p3, p4))position[i][j] = 0;
			else if (i == 0)position[i][j] = 1;
			else if (j == 0)position[i][j] = 1;
			else position[i][j] = position[i - 1][j] + position[i][j - 1];
		}
	}

	printf("%d", position[p1][p2]);
	return 0;
}
int judge(int i, int j, int p3, int p4)//i为横坐标，j为纵坐标;
{
	int k = 0;                         //判断是否为控制点的返回值
	int as = 0;
	int h, s;
	h = abs(i - p3);
	s = abs(j - p4);
	as = pow(h, 2) + pow(s, 2);       //判断两点之间距离是否为根号五
	if (as == 5)k = 1;
	else if (i == p3 && j == p4)k = 1;//判断是否在马的位置
	else k = 0;
	return(k);
}

有点问题，只能60分，不知道怎么改