Valid Username Regular Expression | String | HackerRank | Solution | color the code

Problem : https://www.hackerrank.com/challenges/valid-username-checker/problem

Solution : 

Basic Data Types | HackerRank | Solution | C++

Problem : https://www.hackerrank.com/challenges/c-tutorial-basic-data-types/problem

Solution : 

#include <iostream>

#include <cstdio>

using namespace std;

int main() {

    // Complete the code.

    int a;

    float b;

    char c;

    double d;

    long l;

    scanf("%d %ld %c %f %lf",&a ,&l,&c,&b,&d);

    printf("%d\n%ld\n%c\n%0.3f\n%.9lf",a,l,c,b,d);

    return 0;

}

Input and Output | Hackrrank | C++ | Solution

Problem : https://www.hackerrank.com/challenges/cpp-input-and-output/problem

Solution : #include <cmath>

#include <cstdio>

#include <vector>

#include <iostream>

#include <algorithm>

using namespace std;

int main() {

    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   

    int a , b , c;

    cin>>a>>b>>c;

    int sum = 0;

    sum = a + b + c;

    cout<<sum;

    return 0;

}