Hamburgers CodeForces - 371C 二分

#include<map>
#include<queue>
#include<time.h>
#include<limits.h>
#include<cmath>
#include<ostream>
#include<iterator>
#include<set>
#include<stack>
#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
using namespace std;
#define rep_1(i,m,n) for(int i=m;i<=n;i++)
#define mem(st) memset(st,0,sizeof st)
#define int long long
typedef long long ll;
const int inf = 0x3f3f3f3f;
char re[227];
ll need[4],num[4],price[4];
ll r;
bool check(ll x)
{
	ll B=x*need[1], S=x*need[2], C=x*need[3];
	ll tmp1=0, tmp2=0, tmp3=0;
	if(num[1] < B)
		tmp1= (B - num[1]) * price[1];
	if(num[2] < S)
		tmp2= (S - num[2]) * price[2];
	if(num[3] < C)
		tmp3= (C - num[3]) * price[3];
	if(tmp1+tmp2+tmp3 <= r)
		return true;
	else
		return false;
}
signed main()
{
	cin>>re;
	for(int i=0; i<strlen(re); i++)
	{
		if(re[i]=='B')
			need[1]++;
		else if(re[i]=='S')
			need[2]++;
		else if(re[i]=='C')
			need[3]++;
	}
	for(int i=1; i<=3; i++)
		cin>>num[i];
	for(int i=1; i<=3; i++)
		cin>>price[i];
	cin>>r;
	ll l=0,r1=2e12;
	while(l<r1)
	{
		ll mid=l+r1+1>>1;
		if(check(mid))
			l=mid;
		else
			r1=mid-1;
	}
	if(l==0)
		cout<<0<<endl;
	else
		cout<<l<<endl;
	return 0;
}