Hackerrank solutions

Author: Shubham-Choudhury

hackerrank/10_Attribute_Parser.cpp

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+// Link: https://www.hackerrank.com/challenges/c-tutorial-stringstream/problem
+
+#include <sstream>
+#include <vector>
+#include <iostream>
+using namespace std;
+
+vector<int> parseInts(string str) {
+    // Complete this function
+    vector<int> result;
+    stringstream ss(str);
+    char ch;
+    int tmp;
+    while (ss >> tmp) {
+        result.push_back(tmp);
+        ss >> ch;
+    }
+    return result;
+}
+
+int main() {
+    string str;
+    cin >> str;
+    vector<int> integers = parseInts(str);
+    for(int i = 0; i < integers.size(); i++) {
+        cout << integers[i] << endl;
+    }
+    
+    return 0;
+}

hackerrank/11_StringStream.cpp

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+// Link: https://www.hackerrank.com/challenges/c-tutorial-strings/problem
+
+#include <iostream>
+#include <string>
+using namespace std;
+
+int main() {
+    string a, b;
+    cin >> a >> b;
+    cout << a.size() << " " << b.size() << endl;
+    cout << a + b << endl;
+    char tmp = a[0];
+    a[0] = b[0];
+    b[0] = tmp;
+    cout << a << " " << b << endl;
+    return 0;
+}

hackerrank/12_Strings.cpp

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+// Link: https://www.hackerrank.com/challenges/c-tutorial-struct/problem
+
+#include <iostream>
+#include <sstream>
+using namespace std;
+
+struct Student {
+    int age;
+    string first_name;
+    string last_name;
+    int standard;
+};
+
+int main() {
+    Student st;
+    cin >> st.age >> st.first_name >> st.last_name >> st.standard;
+    cout << st.age << " " << st.first_name << " " << st.last_name << " " << st.standard;
+    return 0;
+}
+

hackerrank/13_Structs.cpp

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+// Link: https://www.hackerrank.com/challenges/c-tutorial-class/problem
+
+#include <iostream>
+#include <sstream>
+using namespace std;
+
+class Student {
+    private:
+        int age, standard;
+        string first_name, last_name;
+    public:
+        void set_age(int a) {
+            age = a;
+        }
+        void set_standard(int s) {
+            standard = s;
+        }
+        void set_first_name(string fn) {
+            first_name = fn;
+        }
+        void set_last_name(string ln) {
+            last_name = ln;
+        }
+        int get_age() {
+            return age;
+        }
+        int get_standard() {
+            return standard;
+        }
+        string get_first_name() {
+            return first_name;
+        }
+        string get_last_name() {
+            return last_name;
+        }
+        string to_string() {
+            stringstream ss;
+            ss << age << "," << first_name << "," << last_name << "," << standard;
+            return ss.str();
+        }
+};
+
+int main() {
+    int age, standard;
+    string first_name, last_name;
+    
+    cin >> age >> first_name >> last_name >> standard;
+    
+    Student st;
+    st.set_age(age);
+    st.set_standard(standard);
+    st.set_first_name(first_name);
+    st.set_last_name(last_name);
+    
+    cout << st.get_age() << endl;
+    cout << st.get_last_name() << ", " << st.get_first_name() << endl;
+    cout << st.get_standard() << endl;
+    cout << endl;
+    cout << st.to_string();
+    
+    return 0;
+}

hackerrank/14_Class.cpp

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+// Link: https://www.hackerrank.com/challenges/classes-objects/problem
+
+
+#include <cmath>
+#include <cstdio>
+#include <vector>
+#include <iostream>
+#include <algorithm>
+using namespace std;
+
+
+class Student {
+    private:
+        int scores[5];
+    public:
+        void input() {
+            for (int i = 0; i < 5; i++) {
+                cin >> scores[i];
+            }
+        }
+        int calculateTotalScore() {
+            int total = 0;
+            for (int i = 0; i < 5; i++) {
+                total += scores[i];
+            }
+            return total;
+        }
+};
+
+int main() {
+    int n; // number of students
+    cin >> n;
+    Student *s = new Student[n]; // an array of n students
+    
+    for(int i = 0; i < n; i++){
+        s[i].input();
+    }
+    
+    // calculate kristen's score
+    int kristen_score = s[0].calculateTotalScore();
+    
+    // determine how many students scored higher than kristen
+    int count = 0;
+    for(int i = 1; i < n; i++){
+        int total = s[i].calculateTotalScore();
+        if(total > kristen_score){
+            count++;
+        }
+    }
+    
+    // print result
+    cout << count;
+    
+    return 0;
+}

hackerrank/15_Classes_and_Objects.cpp

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+// Link: https://www.hackerrank.com/challenges/box-it/problem
+
+#include <bits/stdc++.h>
+
+using namespace std;
+
+
+class Box {
+    private:
+        int l, b, h;
+    public:
+        Box() {
+            l = 0;
+            b = 0;
+            h = 0;
+        }
+        Box(int length, int breadth, int height) {
+            l = length;
+            b = breadth;
+            h = height;
+        }
+        Box(Box &B) {
+            l = B.l;
+            b = B.b;
+            h = B.h;
+        }
+        int getLength() {
+            return l;
+        }
+        int getBreadth() {
+            return b;
+        }
+        int getHeight() {
+            return h;
+        }
+        long long CalculateVolume() {
+            return (long long)l * b * h;
+        }
+        bool operator<(Box &B) {
+            if (l < B.l) {
+                return true;
+            } else if (b < B.b && l == B.l) {
+                return true;
+            } else if (h < B.h && b == B.b && l == B.l) {
+                return true;
+            } else {
+                return false;
+            }
+        }
+        friend ostream& operator<<(ostream& out, Box& B);
+};
+
+ostream& operator<<(ostream& out, Box& B) {
+    out << B.l << " " << B.b << " " << B.h;
+    return out;
+}
+
+void check2() {
+    int n;
+    cin >> n;
+    Box temp;
+    for (int i = 0; i < n; i++) {
+        int type;
+        cin >> type;
+        if (type == 1) {
+            cout << temp << endl;
+        }
+        if (type == 2) {
+            int l, b, h;
+            cin >> l >> b >> h;
+            Box NewBox(l, b, h);
+            temp = NewBox;
+            cout << temp << endl;
+        }
+        if (type == 3) {
+            int l, b, h;
+            cin >> l >> b >> h;
+            Box NewBox(l, b, h);
+            if (NewBox < temp) {
+                cout << "Lesser" << endl;
+            } else {
+                cout << "Greater" << endl;
+            }
+        }
+        if (type == 4) {
+            cout << temp.CalculateVolume() << endl;
+        }
+        if (type == 5) {
+            Box NewBox(temp);
+            cout << NewBox << endl;
+        }
+    }
+}
+
+int main() {
+    check2();
+}

hackerrank/16_Box_It.cpp

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+// Link: https://www.hackerrank.com/challenges/inherited-code/problem
+
+#include <iostream>
+#include <string>
+#include <sstream>
+#include <exception>
+using namespace std;
+
+/* Define the exception here */
+class BadLengthException {
+    private: 
+        int n;
+    public:
+        BadLengthException(int errornumber) {
+            n = errornumber;
+        }
+    
+        int what() {
+            return n;
+        }
+};
+
+
+bool checkUsername(string username) {
+    bool isValid = true;
+    int n = username.length();
+    if(n < 5) {
+        throw BadLengthException(n);
+    }
+    for(int i = 0; i < n-1; i++) {
+        if(username[i] == 'w' && username[i+1] == 'w') {
+            isValid = false;
+        }
+    }
+    return isValid;
+}
+
+int main() {
+    int T; cin >> T;
+    while(T--) {
+        string username;
+        cin >> username;
+        try {
+            bool isValid = checkUsername(username);
+            if(isValid) {
+                cout << "Valid" << '\n';
+            } else {
+                cout << "Invalid" << '\n';
+            }
+        } catch (BadLengthException e) {
+            cout << "Too short: " << e.what() << '\n';
+        }
+    }
+    return 0;
+}