func_code_string: #include <bits/stdc++.h>   using namespace std;   signed main() {     long long t, n, m, xa, ya, xb, yb;     scanf( %lld , &t);     while (t--) {       scanf( %lld%lld%lld%lld%lld%lld , &n, &m, &xa, &ya, &xb, &yb);       long long miny = min(ya, yb), minx = min(xa, xb), maxy = max(ya, yb),                 maxx = max(xa, xb);       long long s = (m - (maxy - miny)) * (n - (maxx - minx)) * 2;       long long lx = n - (maxx - minx), ly = m - (maxy - miny);       long long len1 = max(0ll, lx - (maxx - minx + 1) + 1),                 len2 = max(0ll, ly - (maxy - miny + 1) + 1);       printf( %lld n , max(0ll, n * m - (s - len1 * len2)));     }     return 0;   }   