for (size_t i = 0; i < LENGTH(edges); ++i) {

	for (unsigned int i = 0; i < LENGTH(edges); ++i) {

	for (size_t i = 0; i < nlayers; ++i) {

	for (unsigned int i = 0; i < nlayers; ++i) {

	for (size_t i = 0; i < len; ++i) {

	for (unsigned int i = 0; i < len; ++i) {