#include <stdio.h>

int main(void)
{
    int n;
    int a[100];
    int start[100];
    int finish[100];
    printf("Enter number of activities: ");
    scanf("%d",&n);
    printf("Enter starting time and finishing time\n");
    for(int i=0;i<n;i++)
    {
       scanf("%d %d",&start[i],&finish[i]);
       a[i]=i;

    }
    for(int i=n-1;i>=1;i--)
    {
        int t=0;
        for(int j=1;j<=i;j++)
        {
            if(finish[a[j]]>finish[a[t]])
            {
                t=j;
            }
        }

        int temp=a[t];
        a[t]=a[i];
        a[i]=temp;
    }


    int count=0;
    int A[100];
    int i=0;
    A[count]=a[0];
    count+=1;
    for(int m=1;m<n;m++)
    {

        if(start[a[m]]>=finish[a[i]])
        {

            A[count]=a[m];
            i=m;
            count++;

        }
    }

    printf("Result\n");
    for(int i=0;i<count;i++)
    {
        printf("Activity %d: %d %d\n",A[i],start[A[i]],finish[A[i]]);
    }



return 0;

}