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36 lines
911 B
C++
36 lines
911 B
C++
#include <cstdio>
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#include <cstdlib>
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#include <cctype>
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#include <cstring>
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const int L = 1 << 8;
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char buffer[L], *S, *T;
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#define initbuffer(); {T=(S=buffer)+fread(buffer,1,L,stdin); while(!isdigit(*T))T--;T++;}
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#define getint() (S!=T?strtol(S,&S,10):-1)
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int a[52][52], n, m, sx, sy, dx, dy;
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int dfs(int i, int j)
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{
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if (a[i][j] != -1) return a[i][j];
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else if (i == dx&&j == dy) return a[i][j] = 1;
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else
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{
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int ans = 0;
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if (i + 2 <= dx&&j + 1 <= m)
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ans += dfs(i + 2, j + 1);
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if (i + 2 <= dx&&j - 1 >= 1)
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ans += dfs(i + 2, j - 1);
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if (i + 1 <= dx&&j + 2 <= m)
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ans += dfs(i + 1, j + 2);
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if (i + 1 <= dx&&j - 2 >= 1)
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ans += dfs(i + 1, j - 2);
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return a[i][j] = ans;
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}
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}
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int main()
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{
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initbuffer();
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n = getint(), m = getint(), sx = getint(), sy = getint(), dx = getint(), dy = getint();
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memset(a, -1, sizeof(a));
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printf("%d", dfs(sx, sy));
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return 0;
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}
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