def push(i, j):
    if ((i < len(nums1)) and (j < len(nums2))):
        heappush(min_heap, [(nums1[i] + nums2[j]), i, j])
def push(i, j):
    if ((i < len(nums1)) and (j < len(nums2))):
        heappush(min_heap, [(nums1[i] + nums2[j]), i, j])