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- #include <iostream>
- #include <fstream>
- #include <iomanip>
- using namespace std;
- ifstream fin("pachete.in");
- ofstream fout("pachete.out");
- int n,v[101];
- struct
- {
- int m1,m2;
- }mutare[201];
- int main()
- {
- int i,pozlib,j,aux,k=0;
- cin>>n;
- for(i=1; i<=n; i++)
- cin>>v[i];
- pozlib=n+1;
- for(i=1; i<=n; i++)
- if(v[i]!=i)
- {
- for(j=i+1; j<=n+1; j++)
- if(v[j]==i)
- {
- aux=j; break;
- }
- if(i!=pozlib)
- {
- mutare[++k].m1=i;
- mutare[k].m2=pozlib;
- v[pozlib]=v[i];
- }
- mutare[++k].m1=aux;
- mutare[k].m2=i;
- pozlib=aux;
- }
- cout<<k<<'\n';
- for(i=1; i<=k; i++)
- cout<<mutare[i].m1<<" "<<mutare[i].m2<<'\n';
- return 0;
- }
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