SRM 146 DIV 1 300
はつとっぷこーだ。まあpracticeだけど。
#line 75 "RectangularGrid.cpp" #include <iostream> #include <sstream> #include <string> #include <vector> using namespace std; class RectangularGrid { public: long long countRectangles (int width, int height) { long long total = 0; for (int i = 1; i <= width; i++) { for (int j = 1; j <= height; j++) { if (i == j) continue; total += (width + 1 - i) * (height + 1 - j); } } return total; } };