iTec 2k19 2

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

ifstream fin("verbal_tics.in");
ofstream fout("verbal_tics.out");

#define NMAX 515
char line[NMAX], sep[] = "./?,;:'@#!- ";
vector <string> vs;
vector <pair <string, string>> :: iterator it;
pair <string, string> ps;
vector < pair <string, string> > ans;

int main()
{
    while (fin.getline(line, NMAX))
    {
        char *p = strtok(line, sep);
        while (p)
        {
            vs.push_back(p);
            p = strtok(NULL, sep);
        }
    }

    for (int i = 0; i < (int)vs.size() - 2; i++)
    {
        ps.first = vs[i];
        ps.second = vs[i + 1];
        if (ps.first.size() < 3 or ps.second.size() < 3)
            continue;

        for (int j = i + 1; j < (int)vs.size() - 1; j++)
            if (ps.first == vs[j] && ps.second == vs[j + 1])
            {
                it = find(ans.begin(), ans.end(), ps);
                if (it == ans.end())
                {
                    ans.push_back(make_pair(ps.first, ps.second));
                }
            }
    }

    for (int i = 0; i < (int)ans.size(); i++)
        fout << ans[i].first << ' ' << ans[i].second << '\n';

    return 0;
}