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- #include <fstream>
- #include <iostream>
- #include <cmath>
- using namespace std;
- ifstream fin(".in");
- ofstream fout(".out");
- /// metoda greedy = lacom
- /**
- var 1: calc min1, min2 si max1 max 2 si camparam cele 2 produse
- var 2: sortam vector cresc se compara prod primelor 2 valori si a ultimelor 2 valori
- */
- long long Max1, Max2, Min1, Min2; ///Max1 > Max2 si Min1<Min2
- int x,n,i;
- ///var 1
- int main()
- {
- cin>>n>>x;
- Max1=Max2=Min2=Min1=x;
- for(i=2; i<=n;i++)
- {
- cin>>x;
- if(Max1<x) Max2=Max1, Max1=x;
- else if(Max2<x) Max2=x;
- if(Min1>x) Min2=Min1, Min1=x;
- else if(Min2>x)Min2=x;
- }
- cout<<max(Min1*Min2,Max1*Max2 );
- return 0;
- }
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