Sanalista

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

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

	int n;
	cin >> n;

	ll r = 0;
	while (n--) {
		string s;
		cin >> s;

		map<char, int> m;
		for (auto c : s) ++m[c];
		bool ok = 1;
		for (auto c : m) {
			if (c.second % 2 == 1) ok = 0;
		}
		r += ok;
	}
	cout << r << '\n';
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED