cf po prikolu

https://codeforces.com/problemset/problem/1144/A

#include <bits/stdc++.h>

using namespace std;

int main() {

    int t;
    cin >> t;
    while (t--) {
        string s;
        vector<int> a(26, 0);
        cin >> s;
        for (int i = 0; i < s.size(); i++) {
            a[s[i] - 'a']++;
        }
        int sum = 0, mxl = 0, l = 0;
        bool isDouble = false;
        for (int i = 0; i < 26; i++) {
            if (a[i] > 1) {
                isDouble = true;
            }
            if (a[i] == 1) {
                sum++;
                l++;
                if (mxl < l) mxl = l;
            } else {
                l = 0;
            }
        }
        if (mxl == sum && !isDouble) {
            cout << "Yes\n";
        } else {
            cout << "No\n";
        }
    }

    return 0;
}











https://codeforces.com/problemset/problem/129/A

#include <bits/stdc++.h>

using namespace std;

int main() {

    int n, sum = 0, chet = 0, nechet = 0;
    cin >> n;
    while (n--) {
        int x;
        cin >> x;
        x % 2 == 0 ? chet++ : nechet++;
        sum += x;
    }
    cout << (sum % 2 == 0 ? chet : nechet);

    return 0;
}






https://codeforces.com/problemset/problem/1450/A

#include <bits/stdc++.h>

using namespace std;

int main() {

    int t;
    cin >> t;
    while (t--) {
        int n;
        string s;
        cin >> n >> s;
        int t_count = 0;
        for (int i = 0; i < n; i++) {
            if (s[i] != 't') {
                cout << s[i];
            } else {
                t_count++;
            }
        }
        while (t_count--) cout << 't';
        cout << "\n";
    }

    return 0;
}




https://codeforces.com/problemset/problem/1602/A

#include <bits/stdc++.h>

using namespace std;

int main() {

    int t;
    cin >> t;
    while (t--) {
        string s;
        cin >> s;
        char mn = 'z';
        for (int i = 0; i < s.size(); i++) {
            if (mn > s[i]) mn = s[i];
        }
        cout << mn << " ";
        for (int i = 0; i < s.size(); i++) {
            if (mn == s[i]) {
                mn = '-';
                continue;
            }
            cout << s[i];
        }
        cout << "\n";
    }

    return 0;
}





https://codeforces.com/problemset/problem/984/A

#include <bits/stdc++.h>

using namespace std;

int main() {

    int n;
    cin >> n;
    vector<int> a(n);
    for (int i = 0; i < n; i++) cin >> a[i];
    sort(a.rbegin(), a.rend());
    cout << a[n / 2];

    return 0;
}