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#include<iostream>
#include<cstring>
using namespace std;
int main()
{
    string a;
    int k=0,count=1,i=0,j,n;
    cout<<"Enter the string : ";
    cin>>a;
    n=a.size();
    cout<<"Compressed String : ";
    while(i<n)
    {
        
        for(j=k;j<n;j++)
        {
            if(a[j]==a[j+1])
            {
                count++;
                k=j+1;
            }
            else
            {
                k=j+1;
                break;
            }
        }
        i=k;
        cout<<a[i-1]<<count;
        count=1;
    }

    
}

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#include <stdio.h>
int main()
{
    int arr[10],i,j,n,temp,a,min;
    printf("enter the length of array : ");
    scanf("%d",&a);
    printf("enter the array elements : ");
    for(i=0;i<a;i++)
    {
        scanf("%d",&arr[i]);
    }
    printf("Enter the 'n'th min value to find : ");
    scanf("%d",&n);
   for(i=1;i<a;i++) //insertion sort
   {
       temp=arr[i];
       j=i-1;
       while (j>=0 && arr[j]>temp)
       {
           arr[j+1] = arr[j];
           j = j-1;
       }
       arr[j+1] = temp;
   }
    printf("the minimum element in the given pos in array is : %d",arr[n-1]);
    return 0;
}

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#include<stdio.h>
int main()
{
    int sum=0,a[10][10],i,j,n;
    printf("Enter the order N of matrix : ");
    scanf("%d",&n); //n*n matrix
    printf("Enter the matrix elements : ");
    for(i=0;i<n;i++)
    {
        for(j=0;j<n;j++)
        {
            scanf("%d",&a[i][j]);
        }
    }
    for(i=0;i<n;i++)
    {
        if((i==0)||(i==n-1)) //select only first and last row
        {
            for(j=0;j<n;j++)
            {
                if((j==0)||(j==n-1)) //select only first and last column 
                {
                    sum=sum+a[i][j];
                }
            }
        }
    }
    printf("%d",sum);
    return 0;
    
}

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#include<stdio.h>
#include<conio.h>
#include<string.h>
int main()
{
 char str[20],temp[20],cha;
 int count=0,i,j,len;
 clrscr();
 printf("enter the string : ");
 gets(str);
 strcpy(temp,str);
 strrev(temp);
 len=strlen(str);
 for(i=0;i<=len;i++)
 {
  if(str[i]==temp[i])    //if same elt is present in both the array
  {
  printf("%c",temp[i]);
  }
  else if(count>0)    //after insert the missing character 
  {              //print remaining character without going to else loop
  printf("%c",temp[i]);
  }
  else          //insert missing character
  {
   for(j=len-1;j>=i;j--)
   {
   temp[j+1]=temp[j];//before insert shift the character one pos right
   }
   temp[i]=str[i];      //insert character
   cha=temp[i];
   printf("%c",temp[i]);
   count=count+1;
  }
 }
 printf("\nmissing character : %c",cha);
 getch();
 return 0;
}

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#include <stdio.h>
int main()
{
    int a[10],i,j,diff,n,k; //number of elements in array
    int arr[10],count=0,m,min; //array contains all possible diff in an array
    printf("Enter the number of elements : ");
    scanf("%d",&n);
    printf("enter the array elements :");
    for(i=0;i<n;i++)
    {
        scanf("%d",&a[i]);
    }
    for(i=0;i<n-1;i++)
    {
        k=i+1;
        for(j=k;j<n;j++)
        {
            diff=a[i]-a[j];
            arr[count]=abs(diff); //difference stored in second array
            count++;
        }
    }
    //find the smallest number in the second array 
    min=arr[0];
    for(m=1;m<count;m++)
    {
        if(arr[m]<min)
        {
            min=arr[m];
        }
    }
    printf("minimum absolute difference = %d",min);
    return 0;
}

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#include<stdio.h>
#include<string.h>
int main()
{
    char a[20],b[20],t[20];
    int j=0,l,k,i;
    printf("Enter the string  ");
    gets(a);
    l=strlen(a);
    for(i=0;i<l;i++)
    {
        if((a[i]=='a')||(a[i]=='i')||(a[i]=='o')||(a[i]=='u')||(a[i]=='e'))
        {
            b[j]=a[i]; //vowels stored in another array
            j++;
        }
    }
    k=strlen(b);
    j=0;
    for(i=l-1;i>=0;i--)
    {
        if((a[i]=='a')||(a[i]=='i')||(a[i]=='o')||(a[i]=='u')||(a[i]=='e'))
        {
            a[i]=b[j];
            j++;
        }
    }
    printf("%s",a);
}