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using namespace std;
 
//mudar file.in pelo nome do input e por FILE_IN
//antes dos scanfs
#define FILE_IN freopen("file.in", "r", stdin);
 
#define fr(i,n) for(int i=0;i<n;i++)
#define frr(i,a,b) for(int i =a;i<=b;i++)
// for(auto it : g[i].nb)
 
typedef long long ll;
typedef long double ld;
 
#define pb push_back
 
#define all(a) a.begin(),a.end() 
 
#define fi first
#define se second
typedef pair<int,int> pii;
 
#define PI acos(-1)
ll MOD = 1e9+7;
 
//LONG_LONG_MAX
//-DBL_MAX
 
bool debug = 0;
#define printa(a) cout << #a << " = " << (a) << endl
#define prin(a) if(debug) cout << #a << " = " << (a) << endl
#define prinsep if(debug) cout << "------" << endl;
#define cendl if(debug) cout << endl
 
class oin{
public:
	bool mais;
	int k;
	vector<int> v;
};
 
vector<oin> v;
 
string ss(int i){
	if(i==0){
		return string("project");
	} else{
		string s = "object";
		s+= to_string(i);
		return s;
	}
}
 
void dfs(int ii, int niv){
	string sout;
	fr(i,niv){
		sout+="  ";
	}
 
	if(v[ii].k){
		if(v[ii].mais){
			sout[sout.size()-2] = '+';
		} else{
			sout[sout.size()-2] = '-';
		}
	}
	sout+=ss(ii);
	printf("%s\n", sout.c_str());
	if(!v[ii].mais){
		for(auto it : v[ii].v){
			dfs(it,niv+1);
		}
	}
	return;
}
 
int main(){
	int n;
	scanf("%d", &n);
	v.resize(n+1);
 
	fr(i,n+1){
		char c;
		int k;
		scanf(" %c %d", &c, &k);
		if(c=='+') v[i].mais = 1;
		else v[i].mais = 0;
 
		v[i].k = k;
		v[i].v.resize(k);
		fr(j,k){
			scanf("%d", &v[i].v[j]);	
		}
	}
 
	/*
	string s = "oi";
	s+=to_string(100);
	s+= " oi";
	cout << s << endl;
	return 0;
	*/
 
	dfs(0,1);
 
	return 0;
}

prog.cpp:20:9: error: ‘pair’ does not name a type
 typedef pair<int,int> pii;
         ^~~~
prog.cpp:38:2: error: ‘vector’ does not name a type
  vector<int> v;
  ^~~~~~
prog.cpp:41:1: error: ‘vector’ does not name a type
 vector<oin> v;
 ^~~~~~
prog.cpp:43:1: error: ‘string’ does not name a type
 string ss(int i){
 ^~~~~~
prog.cpp: In function ‘void dfs(int, int)’:
prog.cpp:54:2: error: ‘string’ was not declared in this scope
  string sout;
  ^~~~~~
prog.cpp:56:3: error: ‘sout’ was not declared in this scope
   sout+="  ";
   ^~~~
prog.cpp:59:5: error: ‘v’ was not declared in this scope
  if(v[ii].k){
     ^
prog.cpp:61:4: error: ‘sout’ was not declared in this scope
    sout[sout.size()-2] = '+';
    ^~~~
prog.cpp:63:4: error: ‘sout’ was not declared in this scope
    sout[sout.size()-2] = '-';
    ^~~~
prog.cpp:66:2: error: ‘sout’ was not declared in this scope
  sout+=ss(ii);
  ^~~~
prog.cpp:66:13: error: ‘ss’ was not declared in this scope
  sout+=ss(ii);
             ^
prog.cpp:67:29: error: ‘printf’ was not declared in this scope
  printf("%s\n", sout.c_str());
                             ^
prog.cpp:68:6: error: ‘v’ was not declared in this scope
  if(!v[ii].mais){
      ^
prog.cpp: In function ‘int main()’:
prog.cpp:78:16: error: ‘scanf’ was not declared in this scope
  scanf("%d", &n);
                ^
prog.cpp:79:2: error: ‘v’ was not declared in this scope
  v.resize(n+1);
  ^

Standard output is empty