908A - New Year and Counting Cards - CodeForces Solution

#include <bits/stdc++.h>
#define int long long
#define endl "\n"
using namespace std;
int32_t main()
{
    ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
    string s;cin>>s;
    int cnt=0;
    for(auto x : s){
        if(x=='a' or x=='e' or x=='i' or x=='o' or x=='u'
           or x=='1' or x=='3' or x=='5'
           or x=='7' or x=='9')cnt++;
    }
    cout<<cnt<<endl;
}