59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
#include<cstdio>
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#include<cmath>
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#include<iostream>
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#include<queue>
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#include<vector>
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#include<cstring>
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#include<algorithm>
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using namespace std;
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typedef long long ll;
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const ll maxn=100005;
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int T,n,m,l[maxn],r[maxn],ans[maxn],tot,f[maxn];
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struct lr
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{
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int l,r,id;
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lr(int l,int r,int id):l(l),r(r),id(id){};
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bool operator <(const lr& a)const
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{
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if (r==a.r) return l>a.l;
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return r>a.r;
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}
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};
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vector<lr> p[maxn];
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int main()
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{
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scanf("%d",&T);
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while (T--)
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{
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scanf("%d",&n); tot=0;
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for (int i=1;i<=n;i++) scanf("%d",&l[i]);
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for (int i=1;i<=n;i++) scanf("%d",&r[i]);
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for (int i=0;i<=n;i++) p[i].clear();
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for (int i=1;i<=n;i++) p[l[i]].push_back(lr(l[i],r[i],i));
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priority_queue<lr> que;
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for (int i=0;i<=n;)
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{
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for (int j=0;j<p[i].size();j++) que.push(lr(p[i][j]));
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while (!que.empty()&&que.top().r<i) que.pop();
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if (!que.empty()) {ans[tot++]=que.top().id; que.pop(); i++;}
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else break;
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}
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printf("%d\n",tot);
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if (tot)
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{
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memset(f,0,sizeof(f));
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printf("%d",ans[0]);
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for (int i=1;i<tot;i++) printf(" %d",ans[i]);
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for (int i=0;i<tot;i++) f[ans[i]]=1;
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for (int i=1;i<=n;i++) if (!f[i]) printf(" %d",i);
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}
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else for (int i=1;i<=n;i++)
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{
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if (i>1) printf(" ");
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printf("%d",i);
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}
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printf("\n");
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}
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return 0;
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}
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