P1417-烹调方案 

 1 #include <bits/stdc++.h>
 2 #define maxn 13003
 3 #define _for(i,a,b) for(int i = (a);i < b;i ++)
 4 typedef long long ll;
 5 using namespace std;
 6 inline ll read()
 7 {
 8     ll ans = 0;
 9     char ch = getchar(), last = ' ';
10     while(!isdigit(ch)) last = ch, ch = getchar();
11     while(isdigit(ch)) ans = (ans << 1) + (ans << 3) + ch - '0', ch = getchar();
12     if(last == '-') ans = -ans;
13     return ans;
14 }
15 inline void write(ll x)
16 {
17     if(x < 0) x = -x, putchar('-');
18     if(x >= 10) write(x / 10);
19     putchar(x % 10 + '0');
20 }
21 
22 ll T,n;
23 struct P
24 {
25     ll a;
26     ll b;
27     ll c;
28 };
29 P p[52];
30 
31 bool cmp(P t1,P t2)
32 {
33     return t1.c*t2.b < t2.c*t1.b;
34 }
35 ll dp[500003];
36 int main()
37 {
38     T = read(),n = read();
39     _for(i,1,n+1)
40         p[i].a = read();
41     _for(i,1,n+1)
42         p[i].b = read();
43     _for(i,1,n+1)
44          p[i].c = read();
45     
46     sort(p+1,p+n+1,cmp);
47     memset(dp,0,sizeof(dp));
48     _for(i,1,n+1)
49         for(int t = T;t >= 0;t --)
50             if(t>=p[i].c)
51                 dp[t] = max(dp[t],dp[t-p[i].c] + p[i].a - t * p[i].b);
52     
53     ll maxx = 0;
54     _for(i,0,T+1)
55         maxx = max(maxx,dp[i]);
56     write(maxx);
57     return 0;
58 }

 

posted @ 2019-08-12 18:01  Asurudo  阅读(145)  评论(0)    收藏  举报