01 背包
void bag01(int cost,int weight){ for(i=v;i>=cost;i--) if(dp[i]完全背包
void complete(int cost,int weight){ for(i=cost;i<=v;i++) if(dp[i]
多重背包
void multiply(int cost,int weight,int amount){ if(cost*amount>=v) complete(cost,weight); else{ k=1; while(k