代码本蒟蒻不会改，请各路大佬指点本小弟

#include <bits/stdc++.h>
using namespace std;
int a,b,ans;
int main(){
	cin >> a >> b;
	ans = a/2;
	b+=a;
	while(b>=19){
		ans++;
		b-=19;
	}
	cout << ans;
	return 0;
}