include iostream using namespace std int main int cin cin cin if cout

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#include <iostream.h>
using namespace std;
int main() {
int a, b, c;
cin >> a;
cin >> b;
cin >> c;
if ((a+b)>=c) {
cout << 'it is triangle';
}
if ((a+b)<c) {
cout << 'it is not a triangle';
}
return 0;
}