#include <stdio.h>

main ()
{
int a[10] = {1, 15, 7, 5, 6, 12, 16, 31, 31, 25}, T=15, result=-1, i, size=10;
for (i=0; i<size; i++)
{
if (a[i]>=T) {T=a[i]; result=i;}
}
printf ("%d", result);
}

8