#include <iostream>
using namespace std;
int a,b,c;
int main() {
cin>>a>>b>>c;
if (a <(b+c)) { if (b<(a+c)) { if (c<(a+b)) { cout<< "posso costruire un triangolo"<<endl;}
else { cout<< "NON posso costruire un triangolo"<<endl;}}
else { cout<< "NON posso costruire un triangolo"<<endl;}}
else { cout<< "NON posso costruire un triangolo"<<endl;}
return 0;
}
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