#include using namespace std; int howManyGames(int p, int d, int m, int s) { // Return the number of games you can buy int sum=0,count=0; while(sum<=s){ sum+=p; if(p-d <= m) p=m; else p-=d; count++; } return count-1; } int main() { int p; int d; int m; int s; cin >> p >> d >> m >> s; int answer = howManyGames(p, d, m, s); cout << answer << endl; return 0; }