BuyingTshirts.cpp

class BuyingTshirts {
    public:
    int meet(int T, vector<int> Q, vector<int> P) {
      int ans=0;
      int qq=0;
      int pp=0;

      for(int i=0;i<Q.size();i++)
        {
          qq+=Q[i];
          pp+=P[i];
          if(pp>=T && qq>=T)
            ans++;
          if(pp>=T)
            pp-=T;
          if(qq>=T)
            qq-=T;
        }
        return ans;
    }
};