c++ is dumb

#include <iostream>
#include <unordered_map>
using namespace std;

unordered_map< char, int > order;
const int alphabet_size = 26;

int main() {
  int i;
  char lastCh, ch, cnt;

  for ( i = 0; i < alphabet_size; i++ ) {
    cin >> ch;
    order[ ch ] = i;
  }
  // cin.ignore();
  cin >> lastCh >> ch;
  cnt = 1;
  while ( ch != '\n' ) {
    if ( order[ ch ] <= order[ lastCh ] )
      cnt++;
    lastCh = ch;
    cin >> ch;
  }

  cout << cnt << '\n';

  return 0;
}