背包，完全背包，多重背包 ，模板代码

void bag01(int cost,int weight)  
{  
 for(i=v;i>=cost;i--)  
  if(dp[i] 
  
 
 
 

void complete(int cost,int weight)  
{  
 for(i=cost;i<=v;i++)  
  if(dp[i] 
  
 





 
 

void multiply(int cost,int weight,int amount)  
{  
 if(cost*amount>=v)  
  complete(cost,weight);  
 else{  
  k=1;  
  while(k