Example analysis of the sum of ACwing submatrices and the sum of two-dimensional prefixes
The sum of ACwing submatrix and the example analysis of two-dimensional prefix sum. Aiming at this problem, this article introduces the corresponding analysis and solution in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible method.
# include # include using namespace std;const int N = 1010 int int n for a [N] [N], s [N] [N]; int main () {scanf ("% d% d% d", & nGramGramJournal QQ); / / the prefix and subscript still start at 1 (int item1teri
