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- #include <iostream>
- using namespace std;
- int main (){
- int a,b,n;
- int suma=0, tab[1001];
- cin>>n;
- for(int i=1; i<=n; i++){
- cin>>tab[i];
- }
- cin>>a>>b;
- for(int j=a; j<=b;j++){
- suma+=tab[j];
- }
- cout<<suma/((b-a)+1);
- return 0;
- }
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