【HDOJ】2191 悼念512汶川大地震遇难同胞——珍惜现在，感恩生活

多重背包。

 #include <stdio.h>
 #include <string.h>

 int ps, hs, cs, dp[];
 int n, m;

 void completePac(int p, int h) {
     int i, tmp;

     for (i=p; i<=n; ++i) {
         tmp = dp[i-p] + h;
         if (dp[i] < tmp)
             dp[i] = tmp;
     }
 }

 void onezeroPac(int p, int h) {
     int i, tmp;

     for (i=n; i>=p; --i) {
         tmp = dp[i-p] + h;
         if (dp[i] < tmp)
             dp[i] = tmp;
     }
 }

 void multiPac(int p, int h, int c) {
     int k;

     if (p*c >= n) {
         completePac(p, h);
         return ;
     }
     k = ;
     while (k < c) {
         onezeroPac(k*p, k*h);
         c -= k;
         k *= ;
     }
     if (c)
         onezeroPac(c*p, c*h);
 }

 int main() {
     int c;
     int i;

     scanf("%d", &c);

     while (c--) {
         scanf("%d %d", &n, &m);
         memset(dp, , sizeof(dp));
         for (i=; i<m; ++i) {
             scanf("%d %d %d", &ps, &hs, &cs);
             multiPac(ps, hs, cs);
         }
         printf("%d\n", dp[n]);
     }

     return ;
 }