qq_19327307的专栏

DescriptionAs the new term comes, the Ignatius Train Station is very busy nowadays. A lot of student want to get back to school by train(because the trains in the Ignatius Train Station is the fas

（（（）））YES（[]]]{{{}}}NO#include #include #include #include #define lson o<<1, l, m#define rson o<<1|1, m+1, rusing namespace std;char s[11111];int main(){ while(scanf("%s",

输入：（3+2）*2输出：10#include#include#include#includeusing namespace std;const int N=1000;class RPN{public: RPN(string str):s(str) {} string transform() { sta