03 2020 档案

摘要：```c++ #include #include #include #include #include #include #include #include #include using namespace std; struct node { int matrix[3][3]; int step, x, y; int last[2]; }; int ans; int d_x[4] = {-1, 阅读全文

摘要：```c++#include #include #include #include #include #include #include #include #include using namespace std;struct node { int x, y, step;};int d_x[9] = {-1, -1, 0, 1, 1, 1, 0, -1, 0};int d_y[9] = {0... 阅读全文

摘要：```c++ #include #include #include #include #include using namespace std; int get_priority(char &op) { if (op == '+' || op == '-') return 1; if (op == '*' || op == '/') return 2; } double cul(double &a 阅读全文