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- #include <bits/stdc++.h>
- using namespace std;
- #define ll long long
- #define test int t; cin>>t; for(int cs=1;cs<=t;cs++)
- int main()
- {
- ios_base::sync_with_stdio(0);
- cin.tie(0);
- cout.tie(0);
- test
- {
- ll n,d,e,i,j,k,l=0;
- cin>>n;
- ll a[n],c[n];
- for(i=1; i<=n; i++)
- {
- a[i]=i;
- }
- for(i=1; i<=n; i++)
- {
- cin>>d;
- if(d<i)
- {
- l=1;
- }
- if(d>i)
- {
- swap(a[d],a[i]);
- }
- }
- if(l) cout<<-1<<endl;
- else
- {
- for(i=1; i<=n; i++)
- {
- cout<<a[i]<<" ";
- }
- cout<<endl;
- }
- }
- return 0;
- }
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