（状压dp）uva 10817 Headmaster's Headache

Posted 2020-09-28 惜取少年时

题目地址

 1 #include <bits/stdc++.h>
 2 typedef long long ll;
 3 using namespace std;
 4 const int MAX=1e5+5;
 5 const int INF=1e9;
 6 int s,m,n;
 7 int cost[125];
 8 //char sta[MAX];
 9 string sta;
10 int able[125];
11 int dp[125][1<<8][1<<8];
12 int d_p(int i,int s0,int s1,int s2)
13 {
14     if(i==m+n)
15         return s2==(1<<s)-1?0:INF;
16     int& ans=dp[i][s1][s2];
17     if(ans>=0)
18         return ans;
19     ans=INF;
20     if(i>=m)//为应聘者
21         ans=d_p(i+1,s0,s1,s2);//不选
22     int m0=able[i]&s0,m1=able[i]&s1;
23     s0^=m0;s1=(s1^m1)|m0;s2|=m1;
24     ans=min(ans,cost[i]+d_p(i+1,s0,s1,s2));
25     return ans;
26 }
27 int main()
28 {
29     while(~scanf("%d%d%d",&s,&m,&n))
30     {
31         if(s==0)
32             break;
33         getchar();
34         memset(dp,-1,sizeof(dp));
35         memset(able,0,sizeof(able));
36         for(int i=0;i<m+n;i++)
37         {
38             getline(cin,sta);
39             int num=0,len=sta.length(),j;
40             for(j=0;j<len&&sta[j]>=‘0‘&&sta[j]<=‘9‘;j++)
41             {
42                 num=num*10+sta[j]-‘0‘;
43             }
44             cost[i]=num;
45             num=0;
46             for(;j<len;j++)
47             {
48                 if(sta[j]>=‘0‘&&sta[j]<=‘9‘)
49                     num=num*10+sta[j]-‘0‘;
50                 else
51                 {
52                     if(num)
53                     {
54                         --num;
55                         able[i]|=(1<<num);
56                     }
57                     num=0;
58                 }
59             }
60             if(num)
61             {
62                 --num;
63                 able[i]|=(1<<num);
64             }
65         }
66         printf("%d\n",d_p(0,(1<<s)-1,0,0));
67     }
68     return 0;
69 }