#include<iomanip>
using namespace std;
int main(){ int a,b,c; cin>>a>>b>>c;

if(a<c){
int t=a; a=c; c=t;

}
if(b<c){
int t=b; b=c; c=t;

}
cout<<1LL*2*(a*b+a*c+b*c)-a*b<<endl;

return 0;
}

#include using namespace std; typedef long long ll; int main(){ int a,b,c; cin>>a>>b>>c;

if(a<b) { int t=a;a=b;b=t; } if(a<c) { int t=a;a=c;c=t; } if(b<c) { int t=b;b=c;c=t; } return 0;

}

#include<iomanip>
using namespace std;
int main(){ int a,b,c; cin>>a>>b>>c;

if(a<c){
int t=a; a=c; c=t;

}
if(b<c){
int t=b; b=c; c=t;

}
cout<<1LL*2*(a*b+a*c+b*c)-a*b<<endl;

return 0;
}

#include #include using namespace std;

int main(){ int a,b,c; cin>>a>>b>>c; if(a<c){ int t=a; a=c; c=t; } if(b<c){ int t=b; b=c; c=t; } cout<<1LL2(ab+ac+bc)-ab<<endl;

return 0; }

#include #include
using namespace std;

int main(){ int a,b,c; cin>>a>>b>>c;

if(a<c){ int t=a; a=c; c=t;

} if(b<c){ int t=b; b=c; c=t;

} cout<<1LL2(ab+ac+bc)-ab<<endl;

return 0; }

别问，问就是涛逼的 #include #include using namespace std;

int main(){ int a,b,c; cin>>a>>b>>c;

if(a<c){
	int t=a; a=c; c=t;
	
}
if(b<c){
	int t=b; b=c; c=t;
	
}
cout<<1LL*2*(a*b+a*c+b*c)-a*b<<endl;

return 0;

}