Sanalista

#include <bits/stdc++.h>
#define fast ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL)
#define ll long long int
#define ld long double
using namespace std;
const int N = 1e6 + 5;
const int MOD = 1e9 + 7;


int main(){
	fast;
	ll n;
	cin >> n;
	map<char, int> mp;
	ll ans = 0;
	while(n--){
		string s;
		cin >> s;
		for(auto k : s)
			mp[k]++;
		bool ok = true;
		for(auto k : mp)
			if(k.second % 2) ok = false;
		if(ok) ++ans;
		mp.clear();
	}
	cout << ans << "\n";
	return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED