#include<time.h>
#include <stdio.h>
#include<stdlib.h>
#include <string.h>
int main()
{
    int x[30];
    int i,b;
    int r,p;
    char name[11][20]  = {"Umbrella","Pillow blanket","Neck pillow","Towels","Temperature glass","Cloth bag","Multipurpose bag","Slippers","Portable fan","Rice box"};
    for(i = 0;i < 30;++i)
    {
        printf("Enter your student ID (%d/30): ", i+1);
        scanf("%d", &x);
        if(x == 0 && i < 15)
        {
            if ( x == 0 )
            {
                printf("Please enter your ID again\n");
                printf("Enter your student ID (%d/30): ", i+1);
                scanf("%d", &x);
            }
        }
        else if(x == 0 && i >= 15)
        {
            break;
        }
    }
    srand(time(NULL));
    for (b = 0 ; b < 10;++b)
    {
        r = rand()%i;
        p = rand()+1;
        printf("Winner is Number %d student ID %d prize is %d %s\n",r+1,x[r],p,name[p-1]);
    }
   
    return 0;
}