func_code_string: #include<bits/stdc++.h>   using namespace std;   #define ll long long    #define pb push_back   #define inf 1e18   #define nn    n    #define vll vector<long long int>   #define vl vector<long int>   #define ff first   #define ss second                     int main()   {       #ifndef ONLINE_JUDGE       freopen( input.txt ,  r , stdin);       freopen( output.txt ,  w , stdout);       #endif          int t;       cin>>t;          while(t--)       {        ll int hero_attack,hero_health,n;        cin>>hero_attack>>hero_health>>n;           vector<pair<ll int,ll int>> v;        ll int attack[n];        for(int i=0;i<n;i++)        {         cin>>attack[i];              }           ll int health[n];                for(int i=0;i<n;i++)        {         cin>>health[i];              }           for(int i=0;i<n;i++)        {         v.pb({attack[i],health[i]});        }           sort(v.begin(),v.end());               int flag=1;           for(auto &it:v)           {                ll int x,y;            if(hero_health<=0)            {             flag=0;             cout<< NO <<nn;             break;            }               if(it.second%hero_attack!=0)            {            x=(it.second/hero_attack)+1;            }            if(it.second%hero_attack==0)            {            x=it.second/hero_attack;            }            if(hero_health%it.first!=0)            {            y=(hero_health/it.first)+1;            }            if(hero_health%it.first==0)            {            y=hero_health/it.first;            }                  if(x<=y)            {             hero_health=hero_health-x*it.first;               }            else            {             cout<< NO <<nn;             flag=0;             break;               }                    }              if(flag==1)            cout<< YES <<nn;                              }          return 0;      }        