4C test, C++ (gcc)

4C test

//g++  5.4.0

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

struct cf4c {
    string name;
    string response;
    bool isMarked;

cf4c() {
        response = "OK";
        isMarked = false;
    }
};

int main()
{
    int n;
    cin >> n;
    //vector<cf4c> v(n);
    vector<string> names(n);
    vector<string> responses(n, "OK");
    vector<bool> isMarked(n, false);
    for (int i = 0; i < n; i++) {
        cin >> names[i];
    }
    
    int c = 0;
    
    for (int i = 0; i < n; i++) {
        if (isMarked[i] == true) {
            continue;
        }
        
        c = 0;
        for (int j = i + 1; j < n; j++) {
            if (names[i] == names[j]) {
                isMarked[j] = true;
                names[j] += to_string(++c);
                responses[j] = names[j];
            }
        }
    }
    
    for (int i = 0; i < n; i++) {
        /*
        cout << i << setfill(' ') << setw(20) 
            << v[i].name << setfill(' ') << setw(20) 
            << v[i].response << setfill(' ') << setw(20) 
            << v[i].isMarked << endl;
        */
        cout << responses[i] << endl;
    }
    return 0;
}


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