【C++】OJ442

#include<iostream>#include<string>#include<vector>#include<stack>using namespace std;class matrix{public:char name;int row;int rank;    matrix(){name = ' ';row = 0;rank = 0;}};int main(){    vector<matrix>a;int b;cin >> b;while(b>0){matrix c;cin >> c.name;cin >> c.row;cin >> c.rank;a.push_back(c);b--;}string s = " ";char d;int i = 0;int number = 0;stack<char> e;cin >> s;for(unsigned int j = 0;j<s.length();j++){d = s[j];if(d=='(')continue;else if(d==')'){char f = e.top();e.pop();char g = e.top();e.pop();int m1 = 0,n2 = 0,n = 0;vector<matrix>::iterator it;for(it=a.begin();it!=a.end();it++){if(it->name==g){m1 = it->row;n = it->rank;}else if(it->name==f){n2 = it->rank;}}number += m1*n2*n;matrix h;h.name = i;h.row = m1;h.rank = n2;e.push(h.name);a.push_back(h);i++;}else{e.push(d);}}if(e.size()==2){       char f = e.top();   e.pop();   char g = e.top();   e.pop();   int m1 = 0,n2 = 0,n = 0;   vector<matrix>::iterator it;   for(it=a.begin();it!=a.end();it++){if(it->name==g){m1 = it->row;n = it->rank;}else if(it->name==f){n2 = it->rank;}}number += m1*n2*n;}cout << number;}