HDU 5691 (pressure dp) sitting in line

Topic http://acm.hdu.edu.cn/showproblem.php?pid=5691

The state dp,dp[i][j],i represents a state in which the current number is or is not taken, and J indicates the end of the number of J,

1#include <cstdio>2#include <cstring>3#include <iostream>4#include <algorithm>5 using namespacestd;6 7typedefLong Longll;8ll dp[1<< -][ -];9 Ten intnum[ -],dis[ -],vis[ -]; Onell Max (ll X,ll y) {returnX>y?x:y;} A Constll inf=1e18; -  - intMain () the { -     intt,n,pos=0; -scanf"%d",&t); -      while(t--) +     { -scanf"%d",&n); +memset (vis,-1,sizeof(Vis)); A          for(intI=0;i< (1&LT;&LT;N); i++) at              for(intj=0; j<n;j++) -DP[I][J] =-INF; -          for(intI=0; I<n; i++) { -scanf"%d%d",&num[i],&dis[i]); -             if(dis[i]!=-1) -vis[dis[i]]=i; in         } -         if(vis[0]!=-1) dp[(1<<vis[0])][vis[0]]=0;//0 This seat is occupied. to         Else{ +              for(intI=0; I<n; i++)//No specific location -                 if(dis[i]==-1) dp[(1<<i)][i]=0;// the         } *         intCas= (1<<n)-1; $          for(intI=1; I<=cas; i++){Panax Notoginseng             intans=0; -              for(intj=0; J<n; J + +) the                 if(i& (1<<j)) +ans++; A             if(vis[ans]!=-1) the             { +ans=Vis[ans]; -                  for(intj=0; J<n; J + +) $                     if((i& (1&LT;&LT;J)) &&j!=ans) $Dp[i| (1<<ans)][ans]=max (dp[i| (1<<ans)][ans],dp[i][j]+num[j]*Num[ans]); -             } -             Else the             { -                 for(intj=0; J<n; J + +){Wuyi                    if(i& (1<<j)) { the                        for(intk=0; K<n; k++){ -                           if(! (i& (1<<k))) { WuDp[i| (1<<k)][k]=max (dp[i| (1&LT;&LT;K)][k],dp[i][j]+num[k]*num[j]); -                           } About                       } $                    } -                } -             } -         } Aprintf"Case #%d:\n",++POS); +ll maxn=-INF; the          for(intI=0; I<n; i++) -maxn=Max (maxn,dp[cas][i]); $printf"%i64d\n", MAXN); the     } the     return 0; the}

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HDU 5691 (pressure dp) sitting in line