#include <stdio.h>
#include <limits.h>

int minprzek (int A[], int B[], int n)
{
    int l = 0, p = n - 1, min = INT_MAX, it = -1;
    while (l < p)
    {
        int s = (l + p) / 2;
        int x = A[s], y = B[s];
        if (x * x + y * y < min)
        {
            it = s;
            min = x * x + y * y;
        }
        if (A[s] < B[s]) l = s + 1;
        else p = s;
    }

    l = it; p = n - 1;
    while (l < p)
    {
        int s = (l + p + 1) / 2;
        int x = A[s], y = B[s];
        if (x * x + y * y < min)
        {
            it = s;
            min = x * x + y * y;
        }
        if (A[s] > B[s]) p = s - 1;
        else l = s;
    }
    return it;
}

int main ()
{
    int A[] = {0}, B[] = {0}, n = 1;
    int k = minprzek (A, B, n);
    printf ("%d", k);
}