Answer:
#include <bits/stdc++. h>
using namespace std;
int main(){
int AdultPrice = 20;
int ChildrenPrice = 15;
int numChildren, numAdults;
cin >>numChildren >> numAdults;
int revChildren = numChildren*ChildrenPrice;
int revAdult = numAdults*AdultPrice;
cout << revChildren+revAdult << endl;
return 0;
}