#include <bits/stdc++.h>
using namespace std;
double a,b,c;
void init(){
cin>>a;
cin>>b;
cin>>c;
}
void solve(){
if(a>0&&b>0&&c>0)
cout<<"Ca 3 so deu duong";
else if(a<0||b<0||c<0){
cout<<"It nhat mot so am";
}
}
int main() {
init();
solve();
return 0;
}
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