1474.cpp

	int bas = (M - totalSize) / (N - 1);
	int redBlank = (M - totalSize) % (N - 1);

	
	for (int i = 1; i < N; ++i) {
		if (redBlank > 0 && ('a' <= bb[i][0] && bb[i][0] <= 'z')) {
			bb[i] = '_' + bb[i];
			redBlank--;
		}
	}

	for (int i = N - 1; i > 0; --i) {
		if (redBlank > 0 && 'A' <= bb[i][0] && bb[i][0] <= 'Z') {
			bb[i] = '_' + bb[i];
			redBlank--;
		}
	}
	for (int i = 1; i < N; ++i)
		for (int j = 0; j < bas; ++j)
			bb[i] = '_' + bb[i];