codechef2.c

#include <stdio.h>

int main(void)
{
    // your code goes here
    int n, x, y;
    int sum = 0;
    int day = 0;
    int k = 1;
    scanf("%i", &n);
    scanf("%i", &x);
    scanf("%i", &y);
    int arr1[n], arr2[n];
    for (int i = 0; i < n; i++)
    {
        scanf("%i", &arr1[i]);
    }
    for (int i = 0; i < n; i++)
    {
        scanf("%i", &arr2[i]);
    }
    while (k > 0)
    {
        for (int i = 0; i < n; i++)
        {
            arr1[i] += arr2[i];
        }
        day++;
        for (int i = 0; i < n; i++)
        {
            if (arr1[i] >= y)
            {
                sum += arr1[i];
                arr1[i] = 0;
                if (sum > x)
                {
                    printf("%i", day);
                    k = -1;
                    break;
                }
            }
        }
    }
    return 0;
}