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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 a[200005],c,d,e,f,i,j=0,k,l=0;
- cin>>c;
- for(i=1; i<=c; i++)
- {
- cin>>a[i];
- if(a[i]==i)
- {
- j++;
- }
- }
- if(j==c)
- {
- cout<<0<<endl;
- continue;
- }
- for(i=1; i<=c; i++)
- {
- if(a[i]!=i)
- {
- j=i;
- break;
- }
- }
- for(i=c; i>=1; i--)
- {
- if(a[i]!=i)
- {
- k=i;
- break;
- }
- }
- for(i=j; i<=k; i++)
- {
- if(a[i]==i)
- {
- l=1;
- }
- }
- if(l) cout<<2<<endl;
- else cout<<1<<endl;
- }
- return 0;
- }
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