Sanalista

#include <bits/stdc++.h>

typedef long long ll;

#define M 1000000007

using namespace std;

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	int n;
	cin >> n;

    int ans = 0;

	for (int y = 0; y < n; ++y) {
        string s;
        cin >> s;

        int l = (int)s.length();

        map<char, int> m;

        for (int i = 0; i < l; ++i) {
            m[s[i]]++;
        }
        bool ok = true;
        for (auto it = m.begin(); it != m.end(); it++) {
            int val = it->second;

            if (val % 2 != 0) {
                ok = false;
                break;
            }
        } 
        if (ok) {
            ans += 1;
        }
        
	}

    cout << ans << endl;

	return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED