Find the greatest one

/* FOE college wants to recognize the department which

 has succeeded in getting the maximum number of placements

 for this academic year. The departments that have participated

 in the recruitment drive are CSE,ECE, MECH. Help the college find

 the department getting maximum placements. Check for all the possible 

output given in the sample snapshot

Note : If any input is negative, the output should be “Input is Invalid”. 

 If all department has equal number of placements, the output should be 

“None of the department has got the highest placement”. */

#include<iostream>

using namespace std;

int main()

{ 

    int c,e,m;

    cout << "Enter the number of placements in CSE \n";

    cin>>c;

    cout << "Enter the number of placements in ECE \n";

    cin>>e;

    cout << "Enter the number of placements in MECH \n";

    cin>>m;

   if(c==e && c==m && e==m)

     cout<<"None of the department has got the highest placement";

   else

   {

     if(c>0 && e>0 && m>0) 

      { 

         if(c>e && c>m)

         cout<<"The Highest placements is in CSE ";

         else

            if(e>c && e>m)

            cout<<"The highest placements is in ECE";

            else

            cout<<"The highest placements is in MECH";

       }

     else

     cout<<"You entered the invalid value";

    }

     

    

     return 0;

}