P1060-开心的金明 

 1 #include <bits/stdc++.h>
 2 #define _for(i,a,b) for(int i = (a);i < b;i ++)
 3 typedef long long ll;
 4 using namespace std;
 5 int N,m;
 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 int dp[26][30009];
22 int a[2][30];
23 int main()
24 {
25     N = read(),m = read();
26     _for(i,1,m+1)
27         _for(j,0,2)
28             a[j][i] = read(); 
29     memset(dp,0,sizeof(dp));
30     _for(i,1,m+1)
31     {
32         _for(j,0,N+1)
33         {
34             if(a[0][i] <= j)
35                 dp[i][j] = max(dp[i-1][j],dp[i-1][j-a[0][i]]+a[0][i]*a[1][i]);
36             else
37                 dp[i][j] = dp[i-1][j];
38         }
39     }
40     write(dp[m][N]);
41     return 0;
42 }

 

posted @ 2019-08-04 14:25  Asurudo  阅读(161)  评论(0)    收藏  举报