#include <iostream>
using namespace std;
int main() {
// your code goes here
int h1,h2,m1,m2,s1,s2,y,pay,q;
cout<< "enter the first work duration"<<endl;
cin >> h1>>m1>>s1 ;
cout<< "enter the second work duration"<<endl;
cin >> h2>>m2>>s2 ;
q=s1+s2;
q=q/60
y= (h1+h2)*60+s1+s2+m1+m2;
if (y>540)
{
pay=1.5*540+(y%540)*2.5;}
cout << pay<<endl;
return 0;
}
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