func_code_string: #include <bits/stdc++.h>   using namespace std;   template <typename TYPE>   inline TYPE sqr(const TYPE& a) {     return (a) * (a);   }   const int INF = 1000 * 1000 * 1000;   const long double EPS = 1e-9;   const long double PI = 2 * acos(0.0);   const int N = 100100;   int top;   int j;   int a[N];   string ans;   bool f() {     if (j >= top) return false;     if (a[j] == 0) {       ++j;       ans.append( int );       return true;     }     ++j;     ans.append( pair< );     if (!f()) return false;     ans.append( , );     if (!f()) return false;     ans.append( > );     return true;   }   int main() {     int n;     scanf( %d n , &n);     string s;     getline(cin, s);     for (int i = 0; i < int(s.size()); ++i)       if (s[i] ==  t )         a[top++] = 0;       else if (s[i] ==  p )         a[top++] = 1;     if (!f() || j < top) {       puts( Error occurred );     } else {       puts(ans.c_str());     }     return 0;   }   