#include using namespace std; using Int=long long; using Real=long double; templateinline bool chmin(T&A,S B){if(A>B){A=B;return true;}else{return false;}} templateinline bool chmax(T&A,S B){if(A>A>>B>>C>>D; cout<<(B-A+1)*(D-C+1)-max(0,min(B,D)-max(A,C)+1)<<"\n"; } int main() { ios::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr); cout<>T; while(T--)sol(); }