1 Source Code
  2 Problem: 2699        User: sdfzyhy
  3 Memory: 716K        Time: 0MS
  4 Language: G++        Result: Accepted
  5
  6     Source Code
  7
  8     //POJ 2699
  9     #include<vector>
 10     #include<cstdio>
 11     #include<sstream>
 12     #include<cstring>
 13     #include<cstdlib>
 14     #include<iostream>
 15     #include<algorithm>
 16     #define rep(i,n) for(int i=0;i<n;++i)
 17     #define F(i,j,n) for(int i=j;i<=n;++i)
 18     #define D(i,j,n) for(int i=j;i>=n;--i)
 19     #define pb push_back
 20     using namespace std;
 21     inline int getint(){
 22         int v=0,sign=1; char ch=getchar();
 23         while(ch<'0'||ch>'9'){ if (ch=='-') sign=-1; ch=getchar();}
 24         while(ch>='0'&&ch<='9'){ v=v*10+ch-'0'; ch=getchar();}
 25         return v*sign;
 26     }
 27     const int N=100,M=1000,INF=~0u>>2;
 28     typedef long long LL;
 29     /******************tamplate*********************/
 30     int n,m,tot,ans,num,a[N];
 31     char s1[N];
 32     struct edge{int to,v;};
 33     struct Net{
 34         edge E[M];
 35         int head[N],next[M],cnt;
 36         void ins(int x,int y,int v){
 37             E[++cnt]=(edge){y,v};
 38             next[cnt]=head[x]; head[x]=cnt;
 39         }
 40         void add(int x,int y,int v){
 41             ins(x,y,v); ins(y,x,0);
 42         }
 43         int s,t,d[N],Q[M];
 44         bool mklevel(){
 45             F(i,0,t) d[i]=-1;
 46             d[s]=0;
 47             int l=0,r=-1;
 48             Q[++r]=s;
 49             while(l<=r){
 50                 int x=Q[l++];
 51                 for(int i=head[x];i;i=next[i])
 52                     if (d[E[i].to]==-1 && E[i].v){
 53                         d[E[i].to]=d[x]+1;
 54                         Q[++r]=E[i].to;
 55                     }
 56             }
 57             return d[t]!=-1;
 58         }
 59         int dfs(int x,int a){
 60             if (x==t) return a;
 61             int flow=0;
 62             for(int i=head[x];i && flow<a;i=next[i])
 63                 if (E[i].v && d[E[i].to]==d[x]+1){
 64                     int f=dfs(E[i].to,min(a-flow,E[i].v));
 65                     E[i].v-=f;
 66                     E[i^1].v+=f;
 67                     flow+=f;
 68                 }
 69             if (!flow) d[x]=-1;
 70             return flow;
 71         }
 72         void Dinic(){
 73             while(mklevel()) ans+=dfs(s,INF);
 74         }
 75         void init(){
 76             n=0;
 77             gets(s1);
 78             int v=0;
 79             stringstream ss(s1);
 80             while(ss >> v) a[++n]=v;
 81         }
 82         bool check(int k){
 83             cnt=1; F(i,s,t) head[i]=0;
 84             F(i,1,n) add(s,i,a[i]);
 85             int l=n;
 86             F(i,1,n) F(j,i+1,n){
 87                 add(++l,t,1);
 88                 if(i>=k && a[j]>a[i]) add(i,l,1);
 89                 else add(i,l,1),add(j,l,1);
 90             }
 91             ans=0;
 92             Dinic();
 93             return ans==m;
 94         }
 95         void solve(){
 96             m=n*(n-1)/2;
 97             s=0; t=n+m+1;
 98             int l=0,r=n,mid,as=0;
 99     /*
100             while(l<=r){
101                 mid=l+r>>1;
102     //            printf("l=%d r=%d mid=%d\n",l,r,mid);
103                 if (check(mid)) as=mid,r=mid-1;
104                 else l=mid+1;
105             }
106     二分        */
107     //        D(i,n,1) if(!check(i)){as=i;break;}
108
109             F(i,1,n) if(check(i)){as=i-1;break;}
110             printf("%d\n",n-as);
111         }
112     }G1;
113
114     int main(){
115     #ifndef ONLINE_JUDGE
116         freopen("2699.in","r",stdin);
117         freopen("2699.out","w",stdout);
118     #endif
119         int T=getint();
120         while(T--){
121             G1.init();G1.solve();
122         }
123         return 0;
124     }