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.