2011年北理计算机复试上机

题目源地址：https://blog.youkuaiyun.com/u014552756/article/details/55549506
代码原创

1.单词首字母计数

#include<bits/stdc++.h>
using namespace std;
int main(){
	string str;
	set<string> lst;
	map<char, int> mp;
	while(cin >> str){
		lst.insert(str);
	}
	set<string>::iterator it;
	for(it = lst.begin(); it != lst.end(); it++){
		mp[(*it)[0]]++;
	}
	map<char, int>::iterator mit;
	for(mit = mp.begin(); mit!=mp.end(); mit++){
		cout<<mit->first<<" "<<mit->second<<endl;
	}
	return 0;
}	

2.单词字典序排序

#include<bits/stdc++.h>
using namespace std;
int main(){
	vector<string> lst;
	string str;
	while(1){
		cin >> str;
		lst.push_back(str);
		if(getchar() == '\n')
			break;
	}
	sort(lst.begin(), lst.end());
	for(int i = 0; i < lst.size()-1; i++){
		cout << lst[i] << " ";
	}
	cout << lst[lst.size()-1] << endl;
	return 0;
}

3.领导关系

#include<bits/stdc++.h>
using namespace std;

vector<pair<string, int> > re;  
	
void insert(string &str, int level){
	pair<string, int> tmp;
	if(!str.empty()){
		tmp.first = str; 
		tmp.second = level;
		re.push_back(tmp); 
		str = "";
	}
}
//(aaaa(bbbb(cccc,dddd),eeee(ffff)))
int main(){
	string buf;
	stack<string> stk;
	int level = 0;
	getline(cin, buf);
	string str;
	for(int i = 0; i < buf.length(); i++){
		
		switch(buf[i]){
			case '(':{
				insert(str, level);
				level ++;
				break;
			}
			case ')':{
				insert(str, level);
				level --;
				break;
			}
			case ',':
			case ' ':
				insert(str, level);
				break;
			default:{
				str += buf[i];
				break;
			}
		}
	}
	/*
	for(int i = 0; i < re.size(); i++){
		cout << re[i].first << " : " << re[i].second << endl;
	}*/
	
	string input;
	while(cin >> input){
		int f_level = -1;
		for(int i = re.size()-1; i >= 0; i--){
			if(re[i].first == input){
				stk.push(re[i].first);
				f_level = re[i].second - 1;
			}
			if(re[i].second == f_level){
				stk.push(re[i].first);
				f_level --;
			}
		}
		while(stk.size() != 1){
			cout << stk.top() << "->";
			stk.pop();
		}
		cout << stk.top() << endl;
		stk.pop();
	}
	return 0;
}