1022 Digital Library

#include<bits/stdc++.h> 
using namespace std;
struct Node{
	int id;
	string title;
	string author;
	string keys;
	string publisher;
	int pubyear;
};
int main()
{
	//freopen("in.txt","r",stdin);
	int n;cin>>n;vector<Node> ppp;ppp.resize(n);
	for(int i=0;i<n;i++){
		cin>>ppp[i].id;getchar();
		getline(cin,ppp[i].title);
		getline(cin,ppp[i].author);
		getline(cin,ppp[i].keys);
		getline(cin,ppp[i].publisher);
		cin>>ppp[i].pubyear;
	}
	int m;cin>>m;getchar();
	for(int i=0;i<m;i++){
		string temp;
		getline(cin,temp);
		cout<<temp<<endl;
		int t=temp[0]-'0';
		temp=temp.substr(3,temp.length());
		vector<int> tt;
		if(t==1){
			for(int j=0;j<n;j++){
				if(ppp[j].title==temp){
					tt.push_back(ppp[j].id);
				}
			}
			if(tt.size()!=0){
				sort(tt.begin(),tt.end());
				for(int j=0;j<tt.size();j++){
					printf("%07d\n",tt[j]);
				}
			}else{
				cout<<"Not Found"<<endl;
			}
		}else if(t==2){
			for(int j=0;j<n;j++){
				if(ppp[j].author==temp){
					tt.push_back(ppp[j].id);
				}
			}
			if(tt.size()!=0){
				sort(tt.begin(),tt.end());
				for(int j=0;j<tt.size();j++){
					printf("%07d\n",tt[j]);
				}
			}else{
				cout<<"Not Found"<<endl;
			}
		}else if(t==4){
			for(int j=0;j<n;j++){
				if(ppp[j].publisher==temp){
					tt.push_back(ppp[j].id);
				}
			}
			if(tt.size()!=0){
				sort(tt.begin(),tt.end());
				for(int j=0;j<tt.size();j++){
					printf("%07d\n",tt[j]);
				}
			}else{
				cout<<"Not Found"<<endl;
			}
		}else if(t==5){
			for(int j=0;j<n;j++){
				if(to_string(ppp[j].pubyear)==temp){
					tt.push_back(ppp[j].id);
				}
			}
			if(tt.size()!=0){
				sort(tt.begin(),tt.end());
				for(int j=0;j<tt.size();j++){
					printf("%07d\n",tt[j]);
				}
			}else{
				cout<<"Not Found"<<endl;
			}
		}else if(t==3){
			for(int j=0;j<n;j++){
				if(ppp[j].keys.find(temp)!=string::npos){
					tt.push_back(ppp[j].id);
				}
			}
			if(tt.size()!=0){
				sort(tt.begin(),tt.end());
				for(int j=0;j<tt.size();j++){
					printf("%07d\n",tt[j]);
				}
			}else{
				cout<<"Not Found"<<endl;
			}
		}
		tt.clear();
	} 
	return 0;
}