有些晦涩，不一定能懂，自己看着办吧

#include <iostream>
#include <vector>
#include <string>
#include <cmath>
using namespace std;

string process(string s)
{
    string res;
    for (char ch : s)
    {
        if (ch == '<')
        {
            
            if (!res.empty())
                res.pop_back();
        }
        else
        {
            res.push_back(ch);
        }
    }
    return res;
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    vector<string> article;   
    vector<string> input;     
    string line;

    while (getline(cin, line))
    {
        if (line == "EOF") break;
        article.push_back(process(line));
    }

    while (getline(cin, line))
    {
        if (line == "EOF") break;
        input.push_back(process(line));
    }

    int T;
    cin >> T;

    long long correct = 0;
    int line_cnt = min(article.size(), input.size());
    for (int i = 0; i < line_cnt; ++i)
    {
        string &art = article[i];
        string &usr = input[i];
        int len = min(art.size(), usr.size());
        for (int k = 0; k < len; ++k)
        {
            if (art[k] == usr[k])
                correct++;
        }
    }

    int kpm = round(correct * 60.0 / T);
    cout << kpm << endl;

    return 0;
}