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- #include <iostream>
- using namespace std;
- int main() {
- long long n, v[100001];
- cin>>n;
- for(int i=1; i<=n; i++){
- cin>>v[i];
- }
- for(int i=1; i<=2; i++){ // gasim cele mai mici 2 nr a(1), a(2)
- for(int j=i+1; j<=n; j++){
- if(v[i]>v[j]){
- v[i]=v[i]+v[j];
- v[j]=v[i]-v[j];
- v[i]=v[i]-v[j];
- }
- }
- }
- for(int i=n; i>=n-1; i--){ //gasim cele mai mari 2 nr <-> a(n), a(n-1)
- for(int j=i-1; j>=1; j--){
- if(v[i]<v[j]){
- v[i]=v[i]+v[j];
- v[j]=v[i]-v[j];
- v[i]=v[i]-v[j];
- }
- }
- }
- /*
- for(int i=1; i<=n; i++){
- cout<<v[i]<<" ";
- }
- cout<<endl;
- */
- cout<<max(v[1]*v[2], v[n-1]*v[n]);
- return 0;
- }
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