#include <iostream>
#include <cmath>
using namespace std;
int main() {
int creditHours, studyHours, actuallyHours;
//Yonni Bueno-Jaimes
// asking user to input credit hours for the current semester
cout << "How many credit hours are you taking this semester?" << endl;
cin >> creditHours;
//the user's input is times by 3
studyHours = 3 * creditHours;
cout << "You should be studing " << studyHours << " hours." << endl;
//user is asked how much time they actually study
cout << "How many hours do you actually spend studying?" << endl;
cin >> actuallyHours;
// the differece between the actually hours and the study hours is done
studyHours = studyHours - actuallyHours;
cout << "You are only studing "<< studyHours << " hours from what you should actually be spending." << endl;
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//The 2014 FIFA World Cup was played in Rio de Janeiro, Brazil.
double stadiumWigthFt;
double stadiumLenthFt;
double ballCircumference;
int numPlayer;
double playingTime;
cout << "The Estádio Jornalista Mário Filho is 105 m × 68 m." << endl;
//convert meter to ft
stadiumWigthFt = (105 * 3.28);
stadiumLenthFt = (68 * 3.28);
cout << "The Estádio Jornalista Mário Filho is "<< stadiumWigthFt << " ft × " << stadiumLenthFt << " ft." << endl;
//calculation of the ball circumference in cm
ballCircumference= 22 * M_PI;
cout<<"The ball circumference is "<< ballCircumference << " in cm." << endl;
//time each player will play
cout << "How many players are going to play?" << endl;
cin >> numPlayer;
cout << numPlayer << endl;
playingTime = 90.0 / numPlayer;
cout << "Each player will get to play for "<< playingTime << " minutes.";
return 0;
}