srm550div2E.cpp

class EasyConversionMachine {
public:
  string isItPossible(string originalWord, string finalWord, int k) {
    string POSSIBLE = "POSSIBLE";
    string INPOSSIBLE = "IMPOSSIBLE";
    int n = originalWord.size();
    int i;
    int diff=0;
    for(i = 0; i < n; i++){
      if (originalWord[i] != finalWord[i]) diff++;
    }
    if(diff <= k && (((k-diff) % 2) == 0)) return POSSIBLE;
    else return INPOSSIBLE;

  }
}