#include <iostream>
#include <cmath>
#include <cstdlib>
#include <string>
#include <ctime>
 
using namespace std;
 
int main() {
    int credHours;
    int studyTime;
    int userInput;
    int actualStudyTime;
 
    cout << "How many credit hours are you taking?" << endl;
 
    cin >> credHours;
 
    studyTime = credHours * 3;
 
    cout << "Study Time: " << studyTime << endl;
 
    cout << "How many hours do you actually spend studying?" << endl;
 
    cin >> userInput;
 
    actualStudyTime = studyTime - userInput;
 
    cout << "Difference: " << actualStudyTime << endl;
 
    return 0;
}

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