51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
#include<iostream>
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#include<cstdio>
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#include<cstdlib>
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#include<cstring>
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#include<string>
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#include<queue>
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#include<algorithm>
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#include<map>
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#include<iomanip>
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#define INF 99999999
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using namespace std;
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const int MAX=100000+10;
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int s[MAX],num[MAX],pos[MAX];
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int mark[MAX];
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int main(){
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int n,m,q,a;
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while(cin>>n>>m,n+m){
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memset(mark,0,sizeof mark);
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memset(pos,-1,sizeof pos);
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for(int i=0;i<n;++i){
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scanf("%d",&s[i]);
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if(pos[s[i]] == -1)pos[s[i]]=i;
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}
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s[n]=n;
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for(int i=1;i<=m;++i){
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scanf("%d",&q);
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int l=n,r=-1,maxlen=INF;
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for(int j=0;j<q;++j){
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scanf("%d",&a);
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num[a]=0;
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mark[a]=i;
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if(pos[a]>r)r=pos[a];
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if(pos[a]<l)l=pos[a];
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}
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for(int j=l;j<=r;++j)++num[s[j]];
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maxlen=r-l+1;
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while(r<n){
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--num[s[l]];
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if(num[s[l]] == 0){
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while(++r<n && s[r] != s[l])++num[s[r]];
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num[s[r]]=1;
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}
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while(++l<=r && mark[s[l]] != i);
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if(r<n && maxlen>r-l+1)maxlen=r-l+1;
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}
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cout<<maxlen<<endl;
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}
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}
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return 0;
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}
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