Hackerrank Bon Appétit (C++)

C++ :

void bonAppetit(vector<int> bill, int k, int b) {
    int billToSplit = 0;
    string toPrint = "";

    for(int i = 0; i < bill.size(); i++){
        if(i != k){
            billToSplit += bill[i];
        }
    }
    
    billToSplit /= 2;

    if(billToSplit == b){
        toPrint = "Bon Appetit";
    }else{
        int difference = b - billToSplit;
        toPrint = to_string(difference);
    }

    cout << toPrint << endl;
}

Explanation:

The for loop sums up all elements of the vector bill except the element at k and put it in billToSplit. billToSplit is then divided by Brian and Anna. After that, it is compared to b (sum Anna paid Brian for her share). If it’s correct, print Bon Appetot, otherwise, get the difference that Brian must pay Anna back in difference variable, convert it into a string, and print.