一个FLAG #21# 复合词（Compound Words，UVa 10391）

#include <iostream>
#include <cstring>
#include <string>
#include <set>
using namespace std;

set<string> dict;

int main()
{
    string x;
    while (cin >> x) dict.insert(x);

    for (set<string>::iterator it = dict.begin(); it != dict.end(); ++it) {
        string s = *it;
        int len = s.length();
        for (int i = 1; i != len; ++i) {
            if (dict.count(s.substr(0, i)) 
                && dict.count(s.substr(i, len - i))) {
                cout << s << endl;
            }
        }        
    }
    return 0;
}