DP：zoj 2014 || poj 1384 Piggy-Bank（完全双肩包简单变形）

DP：zoj 2014 || poj 1384 Piggy-Bank（完全背包简单变形）

【转】http://blog.****.net/zxy_snow/article/details/6023963

 

#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <string.h>
using namespace std;
int main(void)
{
 int ncases,n;
 int suttle,pigweight,fullweight;
 int w[502],v[502],mmin[10001];
 cin >> ncases;
 while( ncases-- )
 {
  cin >> pigweight >> fullweight;
  suttle = fullweight - pigweight;
  cin >> n;
  for(int i=0; i<10001; i++)    //装满的初始化
   mmin[i] = -10000000;
  mmin[0] = 0;     //这个很重要
  for(int i=0; i<n; i++)
  {
   cin >> v[i] >> w[i];
   v[i] = -v[i];
  }
  for(int i=0; i<n; i++)
   for(int k=w[i]; k<=suttle; k++)
    mmin[k] = max( mmin[k-w[i]]+v[i],mmin[k] );
  if( mmin[suttle] == -10000000)
   cout << "This is impossible." << endl;
  else
   printf("The minimum amount of money in the piggy-bank is %d./n",-mmin[suttle]);
  }
return 0;
}