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I/O Operations

    Waiting or Not Waiting

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    #include
    using namespace std;
    int main() {
      int a;
      cin>>a;
      if(a>0)
        cout<<"I am waiting";
      else
        if(a<0)
        cout<<"I am not waiting";
     else
        cout<<"Sorry";

    return 0;
    }

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    Digits in Words

     

    #include
    using namespace std;
    int main() {
      long int n,sum=0,r;   

    cin>>n;   
    while(n>0)   
    {   
    r=n%10;   
    sum=sum*10+r;   
    n=n/10;   
    }   
    n=sum;   
    while(n>0)   
    {   
    r=n%10;   
    switch(r)   
    {   
    case 1:   
    cout<<"One ";   
    break;   
    case 2:   
    cout<<"Two ";   
    break;   
    case 3:   
    cout<<"Three "; 
    break;   
    case 4:   
    cout<<"Four "; 
    break;   
    case 5:   
    cout<<"Five "; 
    break;   
    case 6:   
    cout<<"Six "; 
    break;   
    case 7: 
    cout<<"Seven "; 
    break; 
    case 8:   
    cout<<"Eight ";   
    break;   
    case 9:   
    cout<<"Nine "; 
    break;   
    case 0:   
    cout<<"Zero "; 
    break;   
    default:   
    cout<<"tttt ";   
    break;   
    }   
    n=n/10;   
    }   

    return 0;
    }

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    Upper case conversion

     

    #include
    #include
    using namespace std;

    int main()
    {
       char s[30];
       int i;

       cin>>s;

       for(i=0;i<=10;i++) {

          if(s[i]>=97 && s[i]<=122)
          {
    s[i]=s[i]-32;
          }
       }
       cout<<s;
       return 0;
    }

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    Country

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    #include
    using namespace std;
    int main()
    {
      int a;
      cin>>a;
        if(a>17 && a<60)
    cout<<"Eligible";
      else
        cout<<"Not Eligible";
    return 0;
    }

    Sachin and his Pills

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     #include
    using namespace std;
    class Month{
      int days;
      public:
      Month(int,int);
      bool leapYear(int);
      int getDays();
    };
    Month::Month(int number,int year){
      if(number<8) (number%2==1)?(days=31):(days=30);
      else (number%2==0)?(days=31):(days=30);
      if(number==2){
        if(leapYear(year)==1) days=29;
        else days=28;
      }
    }
    bool Month::leapYear(int year){
      if(year%400==0) return 1;
      if(year%100==0) return 0;
      if(year%4==0) return 1;
      return 0;
    }
    int Month::getDays(){
      return days;
    }
    int pillDays(int day,int month,int year,int count=0){
      Month M(month,year);
      int monthDays = M.getDays(),i;
      for(i=day;i<=monthDays;i++) if(i%2==1)count++;
      if(monthDays%2==0){
        pillDays(1,month+1,(month==12)?(year+1):(year),count);
      }
      else return count;
    }
    int main(){
      int i,j,n,day,month,year,date[10];
      char temp[10];
      //char date[10];
      cin>>n;
      for(i=0;i<n;i++){
        cin>>temp;
        for(j=0;j<10;j++) date[j]=temp[j]-48;
        day = date[8]*10 + date[9];
        month = date[5]*10 + date[6];
        year = date[0]*1000 + date[1]*100 + date[2]*10 + date[3];
        cout << pillDays(day,month,year) << endl;
      }
      return 0;
    }

    Dhoni and Ziva in Chennai

     
    #include <iostream>
    using namespace std;
    int main() {
    float a;
      int b;
      cin>>b;
      a=(16.6*b)/100;
      cout<<"Your weight on moon is : "<<a;
    return 0;
    }

    You and Me

     
    #include <iostream>
    using namespace std;
    int main() {
    int a,b,c;
      cin>>a>>b;
      cout<<"I am "<<a<<endl;
      cout<<"You are "<<b<<endl;
      c=(a+b)/2;
      cout<<"We are around "<<c;
       
    return 0;
    }

    SRM Calculator

     
    #include<iostream>
    using namespace std;
    int main()
    {
      int op,b,c;
      cin>>op;
      cin>>b>>c;
      switch(op)
      {
        case 1:
          cout<<b+c;
          break;
        case 2:
          cout<<b-c;
          break;
        case 3:
          cout<<b*c;
          break;
        case 4:
          cout<<b/c;break;
          break;
        default:
          cout<<"Invalid Input";
          break;
      }
      return 0;
    }

    Legends of Indian Cricket

     
    #include<iostream>
    using namespace std;
    void expand(int);
    int main()
    {
        int num;
     
        cin>>num;
        expand(num);
    }
    void expand(int value)
    {
        const char * const ones[20] = {"zero", "one", "two", "three","four","five","six","seven",
        "eight","nine","ten","eleven","twelve","thirteen","fourteen","fifteen","sixteen","seventeen",
        "eighteen","nineteen"};
        const char * const tens[10] = {"", "ten", "twenty", "thirty","forty","fifty","sixty","seventy",
        "eighty","ninety"};

        if(value<0)
        {
            cout<<"minus ";
            expand(-value);
        }
        else if(value>=1000)
        {
            expand(value/1000);
            cout<<" thousand";
            if(value % 1000)
            {
                if(value % 1000 < 100)
                {
                    cout << " and";
                }
                cout << " " ;
                expand(value % 1000);
            }
        }
        else if(value >= 100)
        {
            expand(value / 100);
            cout<<" hundred";
            if(value % 100)
            {
                cout << " and ";
                expand (value % 100);
            }
        }
        else if(value >= 20)
        {
            cout << tens[value / 10];
            if(value % 10)
            {
                cout << " ";
                expand(value % 10);
            }
        }
        else
        {
            cout<<ones[value];
        }
        return;
    }

    Play with XOR

     
    #include
    using namespace std;
    int main() {
    int t;cin>>t;
      while(t–){
        int n;cin>>n;int a[n],c1=0,c0=0;
        for(int i=0;i<n;i++){
          cin>>a[i];
          if(a[i]==1)c1++;
          }
        c0=n-c1;
        if(c1%2==0){
          cout<<c0<<endl;
          }
        if(c1%2!=0){
          cout<<c1<<endl;
          }
        }
    return 0;
      }

     

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    Professor Omkar

     
    #include <iostream>
    using namespace std;
    int main() {
    int a,b,c;
      float d;
      cin >> a >> b >> c;
      d=(a*(c-b))*4184;
      cout << "The energy needed is " << d;
    return 0;
    }

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    Swim

     
    #include <iostream>
    using namespace std;
    int main() {
    int a,b,c,s;
      cin>>a>>b;
      c=3.14*a*a;
      s=b*b;
      if(c>s)
        cout<<"I prefer centre 1";
      else
        cout<<"I prefer centre 2";
    return 0;
    }

    Print Floyd's

     
    #include <iostream>
    using namespace std;
    int main()
    {
      int n,k,i,j;
      cin>>n;
      k=1;
      for(i=1;i<=n;i++)
      {
        for(j=1;j<=i;j++,k++)
        {
          cout<<k;
        }
        cout<<endl;
      }
    //cout<<"Hello World";
    return 0;
    }

    Letter Pattern

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    Use the code: Miru2021

    #include
    using namespace std;
    int main()
    {

      int i,j,n;
      char ch='A';
      cin>>n;
      for(i=1;i<=n;i++)
          {
            for(j=1;j<=i;j++)
                {
              if(ch < 'Z'+1)
                 cout<<ch++;
              else{
                ch = 'A';
                cout << ch++;
              }
                }
        cout<<endl;
      }
      return 0;
    }

    Scientist Game

     
    #include
    using namespace std;
    int main()
    {
      int origNum, num, rem, sum = 0;
      cin >> origNum;
      num = origNum;
      while(num != 0)
      {
          rem = num % 10;
          sum += rem * rem * rem;
          num /= 10;
      }
      if(sum == origNum)
        cout<<"Give to Scientist Armstrong";
      else
        cout<<"Dont Give to Scientist Armstrong";
      return 0;
    }

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