문제
풀이
#include <iostream>
#include <map>
#include <string>
using namespace std;
bool solve(void) {
string s; cin >> s;
map<char, int> mp;
for (char c : s) mp[c]++;
int odd = 0;
for (const auto &[_, v] : mp) {
if (v & 1) odd++;
}
return odd <= 1;
}
int main(void) {
ios::sync_with_stdio(false);
cin.tie(nullptr);
cout << (solve() ? "yes" : "no");
return 0;
}